Circularly polarized luminescence(CPL)and two-photon absorption(TPA)materials have garnered considerable attentions due to their minimal energy loss and superior optical penetration[1,2].However,the current challenge ...Circularly polarized luminescence(CPL)and two-photon absorption(TPA)materials have garnered considerable attentions due to their minimal energy loss and superior optical penetration[1,2].However,the current challenge lies in the absence of well-developed strategies for designing materials that combine these two exceptional optical properties.展开更多
Mid-infrared(MIR)-polarized thermal emission has broad applications in areas such as molecular sensing,information encryption,target detection,and optical communication.However,it is difficult for objects in nature to...Mid-infrared(MIR)-polarized thermal emission has broad applications in areas such as molecular sensing,information encryption,target detection,and optical communication.However,it is difficult for objects in nature to produce polarized thermal emission.Moreover,simultaneously generating and modulating broadband MIR thermal emission with both circular and linear polarization is even more difficult.We present a chiral plasmonic metasurface emitter(CPME)composed of asymmetric L-shaped and I-shaped antennas.The CPME consists of In_(3)SbTe_(2)(IST)phase-change material(PCM)antennas,an Al_(2)O_(3) dielectric layer,and an Au substrate.It is demonstrated that the CPME can selectively emit polarized light with different polarization states.Numerical simulations show that the CPME can achieve full Stokes parameter control of MIR thermal emission.By changing the state of the PCM IST,the spectral emissivity of 0 deg,45 deg,90 deg,and 135 deg linearly polarized(LP)lights and left-handed/right-handed circularly polarized(LCP/RCP)lights can be adjusted.In the crystalline state,the CPME exhibits the total degree of polarization(DoP)greater than 0.5 in the wavelength range of 3.4 to 5.3μm,the degree of linear polarization(DoLP)greater than 0.4 in the range of 3.0 to 5.1μm,and the degree of circular polarization(DoCP)greater than 0.4 in the range of 4.5 to 5.6μm.The physical mechanism of polarized emission has been investigated fully based on the near-field intensity distribution and power loss distribution.Finally,the potential applications of the designed CPME in infrared polarization detection and antidetection are verified through numerical calculations.展开更多
The morphological description of wear particles in lubricating oil is crucial for wear state monitoring and fault diagnosis in aero-engines.Accurately and comprehensively acquiring three-dimensional(3D)morphological d...The morphological description of wear particles in lubricating oil is crucial for wear state monitoring and fault diagnosis in aero-engines.Accurately and comprehensively acquiring three-dimensional(3D)morphological data of these particles has became a key focus in wear debris analysis.Herein,we develop a novel multi-view polarization-sensitive optical coherence tomography(PS-OCT)method to achieve accurate 3D morphology detection and reconstruction of aero-engine lubricant wear particles,effectively resolving occlusion-induced information loss while enabling material-specific characterization.The particle morphology is captured by multi-view imaging,followed by filtering,sharpening,and contour recognition.The method integrates advanced registration algorithms with Poisson reconstruction to generate high-precision 3D models.This approach not only provides accurate 3D morphological reconstruction but also mitigates information loss caused by particle occlusion,ensuring model completeness.Furthermore,by collecting polarization characteristics of typical metals and their oxides in aero-engine lubricants,this work comprehensively characterizes and comparatively analyzes particle polarization properties using Stokes vectors,polarization uniformity,and cumulative phase retardation,and obtains a three-dimensional model containing polarization information.Ultimately,the proposed method enables multidimensional information acquisition for the reliable identification of abrasive particle types.展开更多
Strong feld-induced nonsequential double ionization(NSDI)is a signifcant multi-electron phenomenon that provides crucial insights into understanding electron correlation and multiple ionization of atoms and molecules,...Strong feld-induced nonsequential double ionization(NSDI)is a signifcant multi-electron phenomenon that provides crucial insights into understanding electron correlation and multiple ionization of atoms and molecules,but it is typically unattainable in a circularly polarized laser pulse,especially for long-wavelength lasers.We present evidence that NSDI can occur in the presence of a near-infrared or beyond laser pulse by introducing a bowtie-nanotip.The laser-induced local plasmon can alter the local ellipticity of the feld,thereby enabling NSDI through elliptical trajectories that facilitate recollisions with parent atoms.An oval-shaped momentum distribution of recoiled ions provides evidence for the modifcation of trajectories by the aligned nanotips.Our study introduces an innovative control knob to manipulate NSDI and electron dynamics through the utilization of nanostructures.展开更多
The significance of laser-driven polarized beam acceleration has been increasingly recognized in recent years.We propose an efficient method for generating polarized proton beams from a pre-polarized hydrogen halide g...The significance of laser-driven polarized beam acceleration has been increasingly recognized in recent years.We propose an efficient method for generating polarized proton beams from a pre-polarized hydrogen halide gas jet,utilizing magnetic vortex acceleration enhanced by a laser-driven plasma bubble.When a petawatt laser pulse passes through a pre-polarized gas jet,a bubble-like ultra-nonlinear plasma wave is formed.As a portion of the particles constituting this wave,background protons are swept by the acceleration field of the bubble and oscillate significantly along the laser propagation axis.Some of the pre-accelerated protons in the plasma wave are trapped by the acceleration field at the rear side of the target.This acceleration field is intensified by the transverse expansion of the laser-driven magnetic vortex,resulting in energetic polarized proton beams.The spin of energetic protons is determined by their precession within the electromagnetic field,which is described using the Thomas-Bargmann-Michel-Telegdi equation in analytical models and particle-in-cell simulations.Multidimensional simulations reveal that monoenergetic proton beams with an energy of hundreds of MeV,a beam charge of hundreds of pC,and a beam polarization of tens of percent can be produced at laser powers of several petawatts.Such laser-driven polarized proton beams have promise for application in polarized beam colliders,where they can be utilized to investigate particle interactions and to explore the properties of matter under extreme conditions.展开更多
Nighttime navigation faces challenges from limited data and interference,especially when satellite signals are unavailable.Leveraging lunar polarized light,polarization navigation offers a promising solution for night...Nighttime navigation faces challenges from limited data and interference,especially when satellite signals are unavailable.Leveraging lunar polarized light,polarization navigation offers a promising solution for nighttime autonomous navigation.Current algorithms,however,are limited by the requirement for known horizontal attitudes,restricting applications.This study introduces an autonomous 3-D attitude determination method to overcome this limitation.Our approach utilizes the Angle of Polarization(AOP)at night to extract neutral points from the AOP pattern.This allows for the calculation of polarization meridian plane information for attitude determination.Subsequently,we present an optimized Polarization TRIAD(Pol-TRIAD)algorithm to acquire the 3-D attitude.The proposed method outperforms the existing approaches in outdoor experiments by achieving lower Root Mean Square Error(RMSE).For one baseline attitude,it improves pitch by 31.7%,roll by 21.7%,and yaw by 2.6%,while for the attitude with a larger tilt angle,the improvements are 64.4%,30.4%,and 9.1%,respectively.展开更多
Considering the environmental sustainability,the ceramic substrate is preferred in conventional global navigation satellite system(GNSS)antennas.However,the high-density ceramic increases the antennas'mass,and ban...Considering the environmental sustainability,the ceramic substrate is preferred in conventional global navigation satellite system(GNSS)antennas.However,the high-density ceramic increases the antennas'mass,and bandwidth of the GNSS antenna is narrowed by the high permittivity of ceramic.To solve these issues,a compact,lightweight circularly polarized(CP),transmitting(Tx)and receiving(Rx)integrated antenna was proposed for the lightweight and wide-bandwidth GNSS communications antennas.A hollowing sandwich layer was used to balance the bandwidth and weight performance.By optimizing hollowed dimensions,a lightweight and wide bandwidth GNSS antenna could be achieved.Both Tx-Rx antennas were integrated into a printed circuit board(PCB),minimizing the satellite installation space.Simulations and measurements are conducted.The results show that the operating frequency band around 1.6 GHz(Tx)and around 1.5 GHz(Rx),with realized gains 3 dBi(Tx)and 2.5 dBi(Rx).The total mass of the proposed antenna is around 59 g within a compact space of 50 mm×50 mm×10 mm.The proposed CP GNSS antennas show excellent performance in size,mass,and bandwidth,which can be a potential solution for the micro-nano satellite-ground communications.展开更多
Perovskites showcased potential promise for innovative circularly polarized luminescence (CPL)-active multi-channelinformation encryption, owing to the exceptional luminescence brightness. It was still a formidablecha...Perovskites showcased potential promise for innovative circularly polarized luminescence (CPL)-active multi-channelinformation encryption, owing to the exceptional luminescence brightness. It was still a formidablechallenge to fabricate CPL-active perovskites with significant luminescent asymmetry factor (glum) and full-colour-tailorableCPL properties. Indeed, compared to isotropic perovskites, anisotropic perovskite nanowires (NWs)were conducive to carrier separation and transport for polarization enhancement. Herein, three types of CsPb(Br/I)3 NWs with green, orange, red fluorescence (FL) were respectively synthesized and assembled into chiral NWfilms. The right-handed/left-handed chiral NW films constructed by 4+4 layers and 45° inter-angles exhibitshighly symmetric and mirror-like chiral signals. The strongest chiral intensity is more than 3000 medg. CPLsignals with wide colour gamut produce ranging from 480 nm to 800 nm, and tailorable CPL wavelengths aremanipulated by the emission wavelength of perovskite NWs. A giant CPL signal with a maximum glum of up to 10^(-1) is achieved. The polarization imaging of chiral NW films produces brilliant differential circularly polarizedstructural colours, making it more widely used in multilevel anti-counterfeiting systems. A significant break-throughlies in the development of advanced chiral perovskite materials with remarkable glum and tailorable CPLproperties, which sheds new light on optical anti-counterfeiting and intelligent information encryption.展开更多
Symmetry breaking,a critical phenomenon in both natural and artificial systems,is pivotal in constructing chiral structures from achiral building units.This study focuses on the achiral molecule 8,8',8'',8...Symmetry breaking,a critical phenomenon in both natural and artificial systems,is pivotal in constructing chiral structures from achiral building units.This study focuses on the achiral molecule 8,8',8'',8'''-((pyrazine-2,3,5,6-tetrayltetrakis(benzene-4,1-iyl))tetrakis(oxy))tetrakis(octan-1-ol)(TPP-C8OH),an aggregation-induced emission(AIE)molecule,to explore its symmetry breaking behavior in supramolecular assembly.By analyzing TPP-C8OH in various solvents—both non-chiral and chiral—we find that chiral solvents significantly enhance the molecule's symmetry breaking and chiroptical properties.Specially,alcohol solvents,particularly dodecyl alcohol,facilitate the formation of helical structures with both left-handed(M)and right-handed(P)helices within single twisted nanoribbons.This observation contrasts with previously reported symmetry breaking phenomena in assembly systems.Chiral solvents induce assemblies with distinct helical orientations,resulting in notable circularly polarized luminescence(CPL)and circular dichroism(CD)signals.This study elucidates the impact of solvent choice on symmetry breaking and chiral assembly,offering insights into the design of advanced chiral materials with tailored self-assembly processes.展开更多
Recently circularly polarized luminescence(CPL)materials have attracted significant interest.Introducing reversible dynamic property to these materials has been a key focus in cutting-edge fields,such as in high-level...Recently circularly polarized luminescence(CPL)materials have attracted significant interest.Introducing reversible dynamic property to these materials has been a key focus in cutting-edge fields,such as in high-level information encryption.Here,we provided a novel and general strategy involving handednessselective filtration and ground-state chiral self-recovery(CSR)in double film system to address this issue.Based on this strategy,we achieved CPL switch through the reversible modulation of ground-state chirality including absorption and scattering circular dichroism(CD)signals over the full UV-visible wavelength range(365-700 nm)in a single azobenzene polymer(PAzo)film.More importantly,by flexibly changing the type of fluorescent films,it is convenient to achieve general excited-state CSR,that is reversible switching of full-color including ideal white(CIE coordinate(0.33,0.33)),as well as room-temperature phosphorescent CPL.All these CPL signals without almost any intensity decay after three cycles of onand-off switching.Experimental results indicated that the trans-cis isomerization and ordered rearrangement of azobenzene units in PAzo film were the fundamental reasons for realizing CPL switching.Finally,based on this system we achieved dynamic visual encryption and decryption process including multiple decryption methods.This study provides an effective method for constructing a universally applicable chiroptical switch in excited state.展开更多
Although many racemic M4L6cages have been synthesized,little attention has been paid to the resolution of M4L6cages because resolution of these cages is very difficult.To explore the use of optically pure M4L6cages in...Although many racemic M4L6cages have been synthesized,little attention has been paid to the resolution of M4L6cages because resolution of these cages is very difficult.To explore the use of optically pure M4L6cages in chiral applications,it is important to obtain a single enantiomer.In this work,the anionicΛΛΛΛ-Zr_(4)L_(6)andΛΛΛΛ-Zr_(4)L_(6)(L=embonate)cages have been completely separated by introducing chiral organic ligands R/S-BINAP and 1S,2S/1R,2R-DPEN,respectively,and the active vertex of homochiral Zr_(4)L_(6)cage trapsπ-conjugated coordination silver cations(such as[Ag_(2)(DPPM)_(2)]^(2+),chiral[Ag_(2)(PPh_(3))_(2)(DPEN)]^(2+)and[Ag(PPh_(3))(DPEN)]^(+)),obtaining two pair of pure enantiomers(PTC-375(Λ/Λ)and PTC-376(Λ/Λ)).Interestingly,the chiral resolution and surface modification of such zirconium cage endow it with homochirality and significant circularly polarized luminescence(CPL)response,and PTC-376 enantiomers show a CPL output with glumvalues up to~1.4×10^(-2).This work not only provides a new resolution strategy for metal-organic cages,but also expands their chiral application especially in CPL field.展开更多
OBJECTIVE:To evaluate the effects of external application of warm meridian medicated wine and polarized light therapy combined with acupuncture on pain management following vertebroplasty. METHODS:A total of 120 patie...OBJECTIVE:To evaluate the effects of external application of warm meridian medicated wine and polarized light therapy combined with acupuncture on pain management following vertebroplasty. METHODS:A total of 120 patients with osteoporotic vertebral compression fractures treated by vertebroplasty at our hospital were divided into four groups. The control group received non-steroidal anti-inflammatory drugs, the Treatment Group Ⅰ received acupuncture alone, Treatment Group Ⅱ was treated with medicated wine for warming meridians alongside polarized light physiotherapy, and Treatment Group Ⅲ received a combination of medicated wine for warming meridians, polarized light therapy, and acupuncture. The clinical efficacy, pain thresholds at various time points, temperature pain threshold, electric pain threshold, quality of life, sleep quality index, lumbar dysfunction index, visual analog scale(VAS) scores, and incidence of adverse reactions were compared and analyzed across the four groups. RESULTS:The total clinical effective rate in Treatment Group Ⅲ was significantly higher than that in the control group, Treatment Group Ⅰ, and Treatment Group Ⅱ(P < 0.05). At 24 and 72 h post-treatment, the VAS scores, temperature pain thresholds, and electric pain thresholds in Treatment Group Ⅲ were significantly lower than those in the control group, Treatment Group Ⅰ, and Treatment Group Ⅱ(P < 0.05). Additionally, quality-of-life scores in Treatment Group Ⅲ were markedly higher compared to the control group, Treatment Group Ⅰ, and Treatment Group Ⅱ, while the Pittsburgh Sleep Quality Index scores, Oswestry Disability Index scores, and incidence of adverse reactions in Treatment Group Ⅲ were significantly lower than in the other groups(P < 0.05). CONCLUSION:The external application of warm meridian medicated wine and polarized light therapy combined with acupuncture significantly reduces postoperative pain following vertebroplasty, enhances lumbar function, and improves both sleep quality and overall quality of life for patients. This approach is recommended for clinical application.展开更多
Phosphorus-based luminescent materials consist of certain phosphorus in the aromatic backbones,endowing a larger nuclear charge(Z,15P),rich valence states for the phosphorus core,and various electron geometries.These ...Phosphorus-based luminescent materials consist of certain phosphorus in the aromatic backbones,endowing a larger nuclear charge(Z,15P),rich valence states for the phosphorus core,and various electron geometries.These features enable promising exploitation for luminescent materials with significant quantum efficiencies and tunable singlet and triplet populations.This mini review focuses on the break-throughs of organic and organometallic phosphorus compounds in advanced circularly polarized fluorescence(CPF)and circularly polarized room-temperature phosphorescence(CP-RTP)by unveiling the structure-function relationships,e.g.,design concept,charge transfer(CT)type,chiral conformation,and excited state transition configuration,and the recent applications in optical information encryption,lighting-displaying,and organic light emitting diodes(OLEDs).By dedicated analysis of current progresses,we hope this work will throw insights into phosphorus-based CPF and CP-RTP behaviors and provide a reference for the rational design of high-performance phosphorus-based emitters.展开更多
Chiral metal-organic clusters(MOCs)integrating lanthanide ions(Ln^(3+))and organic luminophores present a promising platform for modulating circularly polarized luminescence(CPL).However,achieving dual-wavelength CPL ...Chiral metal-organic clusters(MOCs)integrating lanthanide ions(Ln^(3+))and organic luminophores present a promising platform for modulating circularly polarized luminescence(CPL).However,achieving dual-wavelength CPL in discrete cluster systems constitutes a considerable challenge.Herein,two enantiomeric pairs of heterometallic EuSn oxo clusters,designated as Sn_(2)EuL_(2)-R/S and Sn_(2)EuL_(4)-R/S,were strategically synthesized using axially chiral binaphthol-phosphonate ligands.These hybrid clusters exhibit dual emission,characterized by a broad ligand-derived fluorescence band superimposed with sharp,characteristic Eu^(3+)f-f transitions,which enables excitation-dependent luminescence color tuning.Their emission profiles and quantum yields are found to be exquisitely adjusted by the distinct coordination environments of Sn^(4+)centers.Notably,Sn_(2)EuL_(2)-R/S demonstrates CPL activity in both near-UV(|g_(lum)|=1.7×10^(-3))and visible(|g_(lum)|=3.1×10^(-2))regions.This work not only reports the first instance of dual-wavelength CPL in a lanthanide/tin oxo complex but also establishes a robust design strategy for fabricating color-tunable chiral photonic materials.展开更多
In photocatalysis field,S-scheme heterojunctions show unique advantages and prospects.However,the carrier shielding effect of heterojunctions limits the separation and migration of interfacial charges.In this study,a ...In photocatalysis field,S-scheme heterojunctions show unique advantages and prospects.However,the carrier shielding effect of heterojunctions limits the separation and migration of interfacial charges.In this study,a strategy of“dynamic cascade electric fields to deplete unilaterally accumulated charges”was innovatively proposed to overcome this drawback.By modulating g-C_(3)N_(4)(CN)and Bi_(2)WO_(6)(BWO)using the polarized electric field(PEF)of spontaneously polarized ceramic(SPC),a BWO/SPC-CN composite with cascade internal electric field(IEF)and PEF was successfully constructed for efficient piezophotocatalytic degradation of recalcitrant pollutants.BWO/SPC-CN contributed to 96.8% degradation of carbamazepine,significantly surpassing BWO/CN(70.5%).BWO/SPC-CN performed excellent capacity of harvesting piezoelectric energy due to its unique three-dimensional porous nano-network structure.The PEF of SPC modulated the electronic band structure and thus strengthened the IEF of BWO/SPC-CN,providing a persistent driving force for interfacial charge migration.Moreover,SPC with a strong PEF unilaterally consumed the charges accumulated on CN under periodic piezoelectricity,weakening the shielding electric field to inhibit the recombination of electron-hole pairs.As a consequence,the dynamic cascade PEF-IEF ultimately broke the carrier shielding effect in heterojunction photocatalysis and enhanced interfacial electron transfer.This work provides reliable methods to enhance the interfacial charge transfer in heterojunction and new insights into piezo-photocatalytic mechanism.展开更多
AIM:To evaluate the effects of polarized and nonpolarized sunglasses on visual functions,including distance and near visual acuity,phoria,stereopsis and contrast sensitivity across five spatial frequencies(1.5,3,6,12,...AIM:To evaluate the effects of polarized and nonpolarized sunglasses on visual functions,including distance and near visual acuity,phoria,stereopsis and contrast sensitivity across five spatial frequencies(1.5,3,6,12,18 cycles/degree).METHODS:A before-after study was conducted on 45 emmetropic students from Shahid Beheshti University of Medical Sciences.Visual acuity,contrast sensitivity,stereopsis and phoria were measured under three conditions:without sunglasses,with non-polarized sunglasses and with polarized sunglasses.Tests were conducted under controlled glare conditions to simulate outdoor environments.RESULTS:A total of 45 participants were evaluated,comprising 17 males(37.8%)and 28 females(62.2%).The mean age was 21.67±2.31y(range 18-27y).The mean of distance and near visual acuity in all three conditions were equal to 0.00 logMAR.Contrast sensitivity generally decreased slightly with the use of non-polarized sunglasses compared to the no-sunglasses condition.The mean stereopsis with polarized sunglasses was 101.33±56.139 arc sec,which was worse than the no-sunglasses condition(94.33±46.632 arc sec)and better than the non-polarized sunglasses condition(105.67±58.965 arc sec),although these changes were not significant.In the phoria parameter,distance phoria appeared more affected than near phoria.CONCLUSION:Polarized and non-polarized sunglasses do not significantly affect visual acuity,stereopsis,or phoria under controlled glare conditions.Slight changes in contrast sensitivity are noted,but they are not statistically significant.展开更多
The high mortality rates of colon and rectal tumors have put forward an urgent need for rapid, sensitive, and accurate diagnosis. The polarization imaging technology, with the advantages of noninvasiveness, noncontact...The high mortality rates of colon and rectal tumors have put forward an urgent need for rapid, sensitive, and accurate diagnosis. The polarization imaging technology, with the advantages of noninvasiveness, noncontact, quantification, rapidity, and high sensitivity, is expected to be used for auxiliary diagnosis of colorectal cancer. Herein, the differences in colorectal tissues of four pathological types were studied using this powerful technology. Polarized light imaging combined with the Mueller matrix decomposition (MMPD) method was applied to extract structural features that may be related to colorectal tumors. It demonstrated that parameters δ and θ could reflect the structural differences of colorectal tumors. Preliminary simulated experiment results revealed that the parameter δ was related to the fiber density, and the parameter θ was related to the fiber angle. Then Tamura image texture analysis was used to quantitatively describe tissues of different pathological types, and the results showed that the coarseness, contrast, directionality, and roughness of the four groups were statistically different. Texture analysis based on the quantitative data of the four dimensions could be applied for the identification of benign and malignant colorectal tumors.展开更多
Circularly polarized luminescence(CPL)-active materials have a wide range of technological applications.Traditionally,creating CPL-active materials relies on the use of chiral luminophores.In contrast,supramolecular a...Circularly polarized luminescence(CPL)-active materials have a wide range of technological applications.Traditionally,creating CPL-active materials relies on the use of chiral luminophores.In contrast,supramolecular assembly introduces an innovative and promising strategy for developing CPL-active materials not only from chiral luminophores but also from achiral species.This approach significantly enriches the diversity of CPL-active materials.It also offers an effective means to optimize the performance of CPL-active materials,such as enhancing the asymmetry factor|glum|.Compared to polymers,the assembly of small molecules is generally easier to control.This review systematically summarizes the recent progress and developments in CPL from small-molecule assemblies,particularly focusing on differences,merits,and demerits of three typical assembly modes.The aim is to provide valuable insights for the future development of chiroptical materials.展开更多
Linearly polarized photodetectors(PDs),leveraging the inherent structural and material information encoded in light's polarization state,hold transformative potential for applications ranging from remote sensing t...Linearly polarized photodetectors(PDs),leveraging the inherent structural and material information encoded in light's polarization state,hold transformative potential for applications ranging from remote sensing to biomedical imaging.Traditional systems that rely on external polarizing elements face challenges in miniaturization and efficiency,driving interest in materials with intrinsic anisotropy.Low-dimensional metal halide perovskites,distinguished by their tunable bandgaps,high carrier mobility,and quantum confinement effects,have emerged as a groundbreaking platform for next-generation polarized PDs.This review comprehensively summarizes the theory,materials,and device engineering of linearly polarized PDs based on low-dimensional perovskites.It aims to elucidate polarization mechanisms across dimensions by establishing a rigorous theoretical foundation for linearly polarized PDs of low-dimensional perovskites.Beyond theoretical insights,the review also highlights cutting-edge fabrication techniques for one-dimensional nano wires and two-dimensional heterostructures,along with performance benchmarks of state-of-the-art devices.By integrating experimental advancements with theoretical insights,this work not only advances the fundamental understanding of polarization mechanisms but also outlines actionable pathways for optimizing device performance,stability,and scalability,which may serve as a critical resource for researchers aiming to harness the full potential of low-dimensional perovskites in polarized optoelectronics.展开更多
Non-covalent interactions-driven host-vip assembly based on metallo-tweezers has been used to construct varied optical functional materials with attractive structures and properties.We reported here two pairs of chi...Non-covalent interactions-driven host-vip assembly based on metallo-tweezers has been used to construct varied optical functional materials with attractive structures and properties.We reported here two pairs of chiral gold(Ⅰ)-based metallo-tweezers as hosts to clip Ag^(Ⅰ)or Cu^(Ⅰ)cations for circularly polarized phosphorescence(CPP),driven by the integration of two-fold coordination and heterometallophilic interactions.The Au^(Ⅰ)-based hosts and metal ions-vips formed sandwich structures in 1:1 ratio with high binding affinity.The achieved tweezer/cation adducts exhibited red-shifted absorption bands and circular dichroism signals,which were attributed to the newly formed ligand to metal-metal charge transfer process.Remarkably,the host-vip supramolecular adducts showed turn-on phosphorescence and CPP,which benefited from rigidifying effect of multiple intermolecular interactions and shorter excited-state lifetime.Overall,our findings bring new insights into the feasibility to achieve and modulate CPP performance by fabricating metallo-tweezer-based host-vip complexes.展开更多
基金supported by NSFC(22271282)the Self-deployment Project Research Program of Haixi Institutes,Chinese Academy of Sciences with the grant number of CXZX-2022-JQ04.
文摘Circularly polarized luminescence(CPL)and two-photon absorption(TPA)materials have garnered considerable attentions due to their minimal energy loss and superior optical penetration[1,2].However,the current challenge lies in the absence of well-developed strategies for designing materials that combine these two exceptional optical properties.
基金supported by the National Natural Science Foundation of China(Grant No.61775050).
文摘Mid-infrared(MIR)-polarized thermal emission has broad applications in areas such as molecular sensing,information encryption,target detection,and optical communication.However,it is difficult for objects in nature to produce polarized thermal emission.Moreover,simultaneously generating and modulating broadband MIR thermal emission with both circular and linear polarization is even more difficult.We present a chiral plasmonic metasurface emitter(CPME)composed of asymmetric L-shaped and I-shaped antennas.The CPME consists of In_(3)SbTe_(2)(IST)phase-change material(PCM)antennas,an Al_(2)O_(3) dielectric layer,and an Au substrate.It is demonstrated that the CPME can selectively emit polarized light with different polarization states.Numerical simulations show that the CPME can achieve full Stokes parameter control of MIR thermal emission.By changing the state of the PCM IST,the spectral emissivity of 0 deg,45 deg,90 deg,and 135 deg linearly polarized(LP)lights and left-handed/right-handed circularly polarized(LCP/RCP)lights can be adjusted.In the crystalline state,the CPME exhibits the total degree of polarization(DoP)greater than 0.5 in the wavelength range of 3.4 to 5.3μm,the degree of linear polarization(DoLP)greater than 0.4 in the range of 3.0 to 5.1μm,and the degree of circular polarization(DoCP)greater than 0.4 in the range of 4.5 to 5.6μm.The physical mechanism of polarized emission has been investigated fully based on the near-field intensity distribution and power loss distribution.Finally,the potential applications of the designed CPME in infrared polarization detection and antidetection are verified through numerical calculations.
文摘The morphological description of wear particles in lubricating oil is crucial for wear state monitoring and fault diagnosis in aero-engines.Accurately and comprehensively acquiring three-dimensional(3D)morphological data of these particles has became a key focus in wear debris analysis.Herein,we develop a novel multi-view polarization-sensitive optical coherence tomography(PS-OCT)method to achieve accurate 3D morphology detection and reconstruction of aero-engine lubricant wear particles,effectively resolving occlusion-induced information loss while enabling material-specific characterization.The particle morphology is captured by multi-view imaging,followed by filtering,sharpening,and contour recognition.The method integrates advanced registration algorithms with Poisson reconstruction to generate high-precision 3D models.This approach not only provides accurate 3D morphological reconstruction but also mitigates information loss caused by particle occlusion,ensuring model completeness.Furthermore,by collecting polarization characteristics of typical metals and their oxides in aero-engine lubricants,this work comprehensively characterizes and comparatively analyzes particle polarization properties using Stokes vectors,polarization uniformity,and cumulative phase retardation,and obtains a three-dimensional model containing polarization information.Ultimately,the proposed method enables multidimensional information acquisition for the reliable identification of abrasive particle types.
基金supported by the National Key Research and Development Program of China(Grant No.2022YFE0134200)the National Natural Science Foundation of China(Grant Nos.12474343,12174147,and 12074142)the Natural Science Foundation of Jilin Province,China(Grant No.20220101016JC)。
文摘Strong feld-induced nonsequential double ionization(NSDI)is a signifcant multi-electron phenomenon that provides crucial insights into understanding electron correlation and multiple ionization of atoms and molecules,but it is typically unattainable in a circularly polarized laser pulse,especially for long-wavelength lasers.We present evidence that NSDI can occur in the presence of a near-infrared or beyond laser pulse by introducing a bowtie-nanotip.The laser-induced local plasmon can alter the local ellipticity of the feld,thereby enabling NSDI through elliptical trajectories that facilitate recollisions with parent atoms.An oval-shaped momentum distribution of recoiled ions provides evidence for the modifcation of trajectories by the aligned nanotips.Our study introduces an innovative control knob to manipulate NSDI and electron dynamics through the utilization of nanostructures.
基金supported by the National Natural Science Foundation of China(Grant Nos.12075081 and 12404395)the Innovation Group Project of the Natural Science Foundation of Hubei Province of China(Grant No.2024AFA038)Bin Liu acknowledges the support of Guangdong High Level Innovation Research Institute Project,Grant No.2021B0909050006.
文摘The significance of laser-driven polarized beam acceleration has been increasingly recognized in recent years.We propose an efficient method for generating polarized proton beams from a pre-polarized hydrogen halide gas jet,utilizing magnetic vortex acceleration enhanced by a laser-driven plasma bubble.When a petawatt laser pulse passes through a pre-polarized gas jet,a bubble-like ultra-nonlinear plasma wave is formed.As a portion of the particles constituting this wave,background protons are swept by the acceleration field of the bubble and oscillate significantly along the laser propagation axis.Some of the pre-accelerated protons in the plasma wave are trapped by the acceleration field at the rear side of the target.This acceleration field is intensified by the transverse expansion of the laser-driven magnetic vortex,resulting in energetic polarized proton beams.The spin of energetic protons is determined by their precession within the electromagnetic field,which is described using the Thomas-Bargmann-Michel-Telegdi equation in analytical models and particle-in-cell simulations.Multidimensional simulations reveal that monoenergetic proton beams with an energy of hundreds of MeV,a beam charge of hundreds of pC,and a beam polarization of tens of percent can be produced at laser powers of several petawatts.Such laser-driven polarized proton beams have promise for application in polarized beam colliders,where they can be utilized to investigate particle interactions and to explore the properties of matter under extreme conditions.
基金supported in part by the National Key Research and Development Program of China(Nos.2020YFA0711200,2022YFB4701301)in part by the Defense Industrial Technology Development Program,China(No.JCKY2021601B016)+1 种基金in part by the Fundamental Research Funds for the Central Universities,China(No.YWF-23-JC-07)in part by the National Natural Science Foundation of China(No.62425302)。
文摘Nighttime navigation faces challenges from limited data and interference,especially when satellite signals are unavailable.Leveraging lunar polarized light,polarization navigation offers a promising solution for nighttime autonomous navigation.Current algorithms,however,are limited by the requirement for known horizontal attitudes,restricting applications.This study introduces an autonomous 3-D attitude determination method to overcome this limitation.Our approach utilizes the Angle of Polarization(AOP)at night to extract neutral points from the AOP pattern.This allows for the calculation of polarization meridian plane information for attitude determination.Subsequently,we present an optimized Polarization TRIAD(Pol-TRIAD)algorithm to acquire the 3-D attitude.The proposed method outperforms the existing approaches in outdoor experiments by achieving lower Root Mean Square Error(RMSE).For one baseline attitude,it improves pitch by 31.7%,roll by 21.7%,and yaw by 2.6%,while for the attitude with a larger tilt angle,the improvements are 64.4%,30.4%,and 9.1%,respectively.
基金funded by Basic Research Program of Jiangsu under grant BK20252030。
文摘Considering the environmental sustainability,the ceramic substrate is preferred in conventional global navigation satellite system(GNSS)antennas.However,the high-density ceramic increases the antennas'mass,and bandwidth of the GNSS antenna is narrowed by the high permittivity of ceramic.To solve these issues,a compact,lightweight circularly polarized(CP),transmitting(Tx)and receiving(Rx)integrated antenna was proposed for the lightweight and wide-bandwidth GNSS communications antennas.A hollowing sandwich layer was used to balance the bandwidth and weight performance.By optimizing hollowed dimensions,a lightweight and wide bandwidth GNSS antenna could be achieved.Both Tx-Rx antennas were integrated into a printed circuit board(PCB),minimizing the satellite installation space.Simulations and measurements are conducted.The results show that the operating frequency band around 1.6 GHz(Tx)and around 1.5 GHz(Rx),with realized gains 3 dBi(Tx)and 2.5 dBi(Rx).The total mass of the proposed antenna is around 59 g within a compact space of 50 mm×50 mm×10 mm.The proposed CP GNSS antennas show excellent performance in size,mass,and bandwidth,which can be a potential solution for the micro-nano satellite-ground communications.
基金supported by the National Natural Science Foundation of China(22278184,22272065)the Natural Science Foundation of Jiangsu Province(BK20211530)+1 种基金the Fundamental Research Funds for the Central Universities(JUSRP622018,JUSRP202404022)the Key Research and Development Special Project of Yichun City,Jiangxi Province,China(2023ZDYFZX06).
文摘Perovskites showcased potential promise for innovative circularly polarized luminescence (CPL)-active multi-channelinformation encryption, owing to the exceptional luminescence brightness. It was still a formidablechallenge to fabricate CPL-active perovskites with significant luminescent asymmetry factor (glum) and full-colour-tailorableCPL properties. Indeed, compared to isotropic perovskites, anisotropic perovskite nanowires (NWs)were conducive to carrier separation and transport for polarization enhancement. Herein, three types of CsPb(Br/I)3 NWs with green, orange, red fluorescence (FL) were respectively synthesized and assembled into chiral NWfilms. The right-handed/left-handed chiral NW films constructed by 4+4 layers and 45° inter-angles exhibitshighly symmetric and mirror-like chiral signals. The strongest chiral intensity is more than 3000 medg. CPLsignals with wide colour gamut produce ranging from 480 nm to 800 nm, and tailorable CPL wavelengths aremanipulated by the emission wavelength of perovskite NWs. A giant CPL signal with a maximum glum of up to 10^(-1) is achieved. The polarization imaging of chiral NW films produces brilliant differential circularly polarizedstructural colours, making it more widely used in multilevel anti-counterfeiting systems. A significant break-throughlies in the development of advanced chiral perovskite materials with remarkable glum and tailorable CPLproperties, which sheds new light on optical anti-counterfeiting and intelligent information encryption.
基金support from the National Natural Science Foundation of China(Nos.22471198,22101208)the Fundamental Research Funds for the Central Universities.
文摘Symmetry breaking,a critical phenomenon in both natural and artificial systems,is pivotal in constructing chiral structures from achiral building units.This study focuses on the achiral molecule 8,8',8'',8'''-((pyrazine-2,3,5,6-tetrayltetrakis(benzene-4,1-iyl))tetrakis(oxy))tetrakis(octan-1-ol)(TPP-C8OH),an aggregation-induced emission(AIE)molecule,to explore its symmetry breaking behavior in supramolecular assembly.By analyzing TPP-C8OH in various solvents—both non-chiral and chiral—we find that chiral solvents significantly enhance the molecule's symmetry breaking and chiroptical properties.Specially,alcohol solvents,particularly dodecyl alcohol,facilitate the formation of helical structures with both left-handed(M)and right-handed(P)helices within single twisted nanoribbons.This observation contrasts with previously reported symmetry breaking phenomena in assembly systems.Chiral solvents induce assemblies with distinct helical orientations,resulting in notable circularly polarized luminescence(CPL)and circular dichroism(CD)signals.This study elucidates the impact of solvent choice on symmetry breaking and chiral assembly,offering insights into the design of advanced chiral materials with tailored self-assembly processes.
基金the financial support from the National Natural Science Foundation of China(Nos.22301206,92356305 and 22301208)Natural Science Foundation of Anhui Province(No.2308085J15)+5 种基金Natural Science Foundation of Anhui Provincial Higher Education Institutions(No.2023AH010012)China Post-doctoral Science Foundation(No.2022M722312)the Key Laboratory of Polymeric Material Design and Synthesis for Biomedical Functionthe Priority Academic Program Development(PAPD)of Jiangsu Higher Education InstitutionsJiangsu Funding Program for Excellent Postdoctoral Talentthe Program of Innovative Research Team of Soochow University。
文摘Recently circularly polarized luminescence(CPL)materials have attracted significant interest.Introducing reversible dynamic property to these materials has been a key focus in cutting-edge fields,such as in high-level information encryption.Here,we provided a novel and general strategy involving handednessselective filtration and ground-state chiral self-recovery(CSR)in double film system to address this issue.Based on this strategy,we achieved CPL switch through the reversible modulation of ground-state chirality including absorption and scattering circular dichroism(CD)signals over the full UV-visible wavelength range(365-700 nm)in a single azobenzene polymer(PAzo)film.More importantly,by flexibly changing the type of fluorescent films,it is convenient to achieve general excited-state CSR,that is reversible switching of full-color including ideal white(CIE coordinate(0.33,0.33)),as well as room-temperature phosphorescent CPL.All these CPL signals without almost any intensity decay after three cycles of onand-off switching.Experimental results indicated that the trans-cis isomerization and ordered rearrangement of azobenzene units in PAzo film were the fundamental reasons for realizing CPL switching.Finally,based on this system we achieved dynamic visual encryption and decryption process including multiple decryption methods.This study provides an effective method for constructing a universally applicable chiroptical switch in excited state.
基金supported by the National Natural Science Foundation of China(Nos.92261108 and 2022YFA1503303)the STS Project of Fujian-CAS(No.2023T3054)。
文摘Although many racemic M4L6cages have been synthesized,little attention has been paid to the resolution of M4L6cages because resolution of these cages is very difficult.To explore the use of optically pure M4L6cages in chiral applications,it is important to obtain a single enantiomer.In this work,the anionicΛΛΛΛ-Zr_(4)L_(6)andΛΛΛΛ-Zr_(4)L_(6)(L=embonate)cages have been completely separated by introducing chiral organic ligands R/S-BINAP and 1S,2S/1R,2R-DPEN,respectively,and the active vertex of homochiral Zr_(4)L_(6)cage trapsπ-conjugated coordination silver cations(such as[Ag_(2)(DPPM)_(2)]^(2+),chiral[Ag_(2)(PPh_(3))_(2)(DPEN)]^(2+)and[Ag(PPh_(3))(DPEN)]^(+)),obtaining two pair of pure enantiomers(PTC-375(Λ/Λ)and PTC-376(Λ/Λ)).Interestingly,the chiral resolution and surface modification of such zirconium cage endow it with homochirality and significant circularly polarized luminescence(CPL)response,and PTC-376 enantiomers show a CPL output with glumvalues up to~1.4×10^(-2).This work not only provides a new resolution strategy for metal-organic cages,but also expands their chiral application especially in CPL field.
文摘OBJECTIVE:To evaluate the effects of external application of warm meridian medicated wine and polarized light therapy combined with acupuncture on pain management following vertebroplasty. METHODS:A total of 120 patients with osteoporotic vertebral compression fractures treated by vertebroplasty at our hospital were divided into four groups. The control group received non-steroidal anti-inflammatory drugs, the Treatment Group Ⅰ received acupuncture alone, Treatment Group Ⅱ was treated with medicated wine for warming meridians alongside polarized light physiotherapy, and Treatment Group Ⅲ received a combination of medicated wine for warming meridians, polarized light therapy, and acupuncture. The clinical efficacy, pain thresholds at various time points, temperature pain threshold, electric pain threshold, quality of life, sleep quality index, lumbar dysfunction index, visual analog scale(VAS) scores, and incidence of adverse reactions were compared and analyzed across the four groups. RESULTS:The total clinical effective rate in Treatment Group Ⅲ was significantly higher than that in the control group, Treatment Group Ⅰ, and Treatment Group Ⅱ(P < 0.05). At 24 and 72 h post-treatment, the VAS scores, temperature pain thresholds, and electric pain thresholds in Treatment Group Ⅲ were significantly lower than those in the control group, Treatment Group Ⅰ, and Treatment Group Ⅱ(P < 0.05). Additionally, quality-of-life scores in Treatment Group Ⅲ were markedly higher compared to the control group, Treatment Group Ⅰ, and Treatment Group Ⅱ, while the Pittsburgh Sleep Quality Index scores, Oswestry Disability Index scores, and incidence of adverse reactions in Treatment Group Ⅲ were significantly lower than in the other groups(P < 0.05). CONCLUSION:The external application of warm meridian medicated wine and polarized light therapy combined with acupuncture significantly reduces postoperative pain following vertebroplasty, enhances lumbar function, and improves both sleep quality and overall quality of life for patients. This approach is recommended for clinical application.
基金supported by the National Natural Science Foundation of China(No.21871133)the Natural Science Foundation of Jiangsu Province(No.BK20211146)the Science,Technology,and Innovation Commission of Shenzhen Municipality(No.JCYJ20180307153251975)。
文摘Phosphorus-based luminescent materials consist of certain phosphorus in the aromatic backbones,endowing a larger nuclear charge(Z,15P),rich valence states for the phosphorus core,and various electron geometries.These features enable promising exploitation for luminescent materials with significant quantum efficiencies and tunable singlet and triplet populations.This mini review focuses on the break-throughs of organic and organometallic phosphorus compounds in advanced circularly polarized fluorescence(CPF)and circularly polarized room-temperature phosphorescence(CP-RTP)by unveiling the structure-function relationships,e.g.,design concept,charge transfer(CT)type,chiral conformation,and excited state transition configuration,and the recent applications in optical information encryption,lighting-displaying,and organic light emitting diodes(OLEDs).By dedicated analysis of current progresses,we hope this work will throw insights into phosphorus-based CPF and CP-RTP behaviors and provide a reference for the rational design of high-performance phosphorus-based emitters.
基金financially supported by the National Natural Science Foundation of China(22471268)the National Key Research and Development Project(2022YFA1503900)+2 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB1170000)the Natural Science Foundation of Fujian Province(2022J05090,2024T3003)the Self-deployment Project Research Program of Haixi Institutes,Chinese Academy of Sciences(CXZX-2022-GH03,CXZX-2024-JQ08).
文摘Chiral metal-organic clusters(MOCs)integrating lanthanide ions(Ln^(3+))and organic luminophores present a promising platform for modulating circularly polarized luminescence(CPL).However,achieving dual-wavelength CPL in discrete cluster systems constitutes a considerable challenge.Herein,two enantiomeric pairs of heterometallic EuSn oxo clusters,designated as Sn_(2)EuL_(2)-R/S and Sn_(2)EuL_(4)-R/S,were strategically synthesized using axially chiral binaphthol-phosphonate ligands.These hybrid clusters exhibit dual emission,characterized by a broad ligand-derived fluorescence band superimposed with sharp,characteristic Eu^(3+)f-f transitions,which enables excitation-dependent luminescence color tuning.Their emission profiles and quantum yields are found to be exquisitely adjusted by the distinct coordination environments of Sn^(4+)centers.Notably,Sn_(2)EuL_(2)-R/S demonstrates CPL activity in both near-UV(|g_(lum)|=1.7×10^(-3))and visible(|g_(lum)|=3.1×10^(-2))regions.This work not only reports the first instance of dual-wavelength CPL in a lanthanide/tin oxo complex but also establishes a robust design strategy for fabricating color-tunable chiral photonic materials.
基金financially supported by the National Natural Science Foundation of China(No.22068007).
文摘In photocatalysis field,S-scheme heterojunctions show unique advantages and prospects.However,the carrier shielding effect of heterojunctions limits the separation and migration of interfacial charges.In this study,a strategy of“dynamic cascade electric fields to deplete unilaterally accumulated charges”was innovatively proposed to overcome this drawback.By modulating g-C_(3)N_(4)(CN)and Bi_(2)WO_(6)(BWO)using the polarized electric field(PEF)of spontaneously polarized ceramic(SPC),a BWO/SPC-CN composite with cascade internal electric field(IEF)and PEF was successfully constructed for efficient piezophotocatalytic degradation of recalcitrant pollutants.BWO/SPC-CN contributed to 96.8% degradation of carbamazepine,significantly surpassing BWO/CN(70.5%).BWO/SPC-CN performed excellent capacity of harvesting piezoelectric energy due to its unique three-dimensional porous nano-network structure.The PEF of SPC modulated the electronic band structure and thus strengthened the IEF of BWO/SPC-CN,providing a persistent driving force for interfacial charge migration.Moreover,SPC with a strong PEF unilaterally consumed the charges accumulated on CN under periodic piezoelectricity,weakening the shielding electric field to inhibit the recombination of electron-hole pairs.As a consequence,the dynamic cascade PEF-IEF ultimately broke the carrier shielding effect in heterojunction photocatalysis and enhanced interfacial electron transfer.This work provides reliable methods to enhance the interfacial charge transfer in heterojunction and new insights into piezo-photocatalytic mechanism.
文摘AIM:To evaluate the effects of polarized and nonpolarized sunglasses on visual functions,including distance and near visual acuity,phoria,stereopsis and contrast sensitivity across five spatial frequencies(1.5,3,6,12,18 cycles/degree).METHODS:A before-after study was conducted on 45 emmetropic students from Shahid Beheshti University of Medical Sciences.Visual acuity,contrast sensitivity,stereopsis and phoria were measured under three conditions:without sunglasses,with non-polarized sunglasses and with polarized sunglasses.Tests were conducted under controlled glare conditions to simulate outdoor environments.RESULTS:A total of 45 participants were evaluated,comprising 17 males(37.8%)and 28 females(62.2%).The mean age was 21.67±2.31y(range 18-27y).The mean of distance and near visual acuity in all three conditions were equal to 0.00 logMAR.Contrast sensitivity generally decreased slightly with the use of non-polarized sunglasses compared to the no-sunglasses condition.The mean stereopsis with polarized sunglasses was 101.33±56.139 arc sec,which was worse than the no-sunglasses condition(94.33±46.632 arc sec)and better than the non-polarized sunglasses condition(105.67±58.965 arc sec),although these changes were not significant.In the phoria parameter,distance phoria appeared more affected than near phoria.CONCLUSION:Polarized and non-polarized sunglasses do not significantly affect visual acuity,stereopsis,or phoria under controlled glare conditions.Slight changes in contrast sensitivity are noted,but they are not statistically significant.
文摘The high mortality rates of colon and rectal tumors have put forward an urgent need for rapid, sensitive, and accurate diagnosis. The polarization imaging technology, with the advantages of noninvasiveness, noncontact, quantification, rapidity, and high sensitivity, is expected to be used for auxiliary diagnosis of colorectal cancer. Herein, the differences in colorectal tissues of four pathological types were studied using this powerful technology. Polarized light imaging combined with the Mueller matrix decomposition (MMPD) method was applied to extract structural features that may be related to colorectal tumors. It demonstrated that parameters δ and θ could reflect the structural differences of colorectal tumors. Preliminary simulated experiment results revealed that the parameter δ was related to the fiber density, and the parameter θ was related to the fiber angle. Then Tamura image texture analysis was used to quantitatively describe tissues of different pathological types, and the results showed that the coarseness, contrast, directionality, and roughness of the four groups were statistically different. Texture analysis based on the quantitative data of the four dimensions could be applied for the identification of benign and malignant colorectal tumors.
基金support from the National Natural Science Foundation of China(52473192)。
文摘Circularly polarized luminescence(CPL)-active materials have a wide range of technological applications.Traditionally,creating CPL-active materials relies on the use of chiral luminophores.In contrast,supramolecular assembly introduces an innovative and promising strategy for developing CPL-active materials not only from chiral luminophores but also from achiral species.This approach significantly enriches the diversity of CPL-active materials.It also offers an effective means to optimize the performance of CPL-active materials,such as enhancing the asymmetry factor|glum|.Compared to polymers,the assembly of small molecules is generally easier to control.This review systematically summarizes the recent progress and developments in CPL from small-molecule assemblies,particularly focusing on differences,merits,and demerits of three typical assembly modes.The aim is to provide valuable insights for the future development of chiroptical materials.
基金financially supported by the National Natural Science Foundation of China(Nos.62205011,52473305,92256202,and 12261131500)the Fundamental Research Funds for the Central Universities(No.PY2507)Qian Xuesen Youth Innovation Fund of CASC
文摘Linearly polarized photodetectors(PDs),leveraging the inherent structural and material information encoded in light's polarization state,hold transformative potential for applications ranging from remote sensing to biomedical imaging.Traditional systems that rely on external polarizing elements face challenges in miniaturization and efficiency,driving interest in materials with intrinsic anisotropy.Low-dimensional metal halide perovskites,distinguished by their tunable bandgaps,high carrier mobility,and quantum confinement effects,have emerged as a groundbreaking platform for next-generation polarized PDs.This review comprehensively summarizes the theory,materials,and device engineering of linearly polarized PDs based on low-dimensional perovskites.It aims to elucidate polarization mechanisms across dimensions by establishing a rigorous theoretical foundation for linearly polarized PDs of low-dimensional perovskites.Beyond theoretical insights,the review also highlights cutting-edge fabrication techniques for one-dimensional nano wires and two-dimensional heterostructures,along with performance benchmarks of state-of-the-art devices.By integrating experimental advancements with theoretical insights,this work not only advances the fundamental understanding of polarization mechanisms but also outlines actionable pathways for optimizing device performance,stability,and scalability,which may serve as a critical resource for researchers aiming to harness the full potential of low-dimensional perovskites in polarized optoelectronics.
基金financially supported by the National Natural Science Foundation of China(Nos.92356304,92061201,and 22105177)the National Key R&D Program of China(No.2021YFA1200301)+1 种基金the China Postdoctoral Science Foundation(No.2021TQ0294)the Zhongyuan Thousand Talents(Zhongyuan Scholars)Program of Henan Province(No.234000510007)。
文摘Non-covalent interactions-driven host-vip assembly based on metallo-tweezers has been used to construct varied optical functional materials with attractive structures and properties.We reported here two pairs of chiral gold(Ⅰ)-based metallo-tweezers as hosts to clip Ag^(Ⅰ)or Cu^(Ⅰ)cations for circularly polarized phosphorescence(CPP),driven by the integration of two-fold coordination and heterometallophilic interactions.The Au^(Ⅰ)-based hosts and metal ions-vips formed sandwich structures in 1:1 ratio with high binding affinity.The achieved tweezer/cation adducts exhibited red-shifted absorption bands and circular dichroism signals,which were attributed to the newly formed ligand to metal-metal charge transfer process.Remarkably,the host-vip supramolecular adducts showed turn-on phosphorescence and CPP,which benefited from rigidifying effect of multiple intermolecular interactions and shorter excited-state lifetime.Overall,our findings bring new insights into the feasibility to achieve and modulate CPP performance by fabricating metallo-tweezer-based host-vip complexes.
