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
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
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
The development of circularly polarized luminescence (CPL) materials from simple organic molecules is of critical importance for advancing their practical applications, yet it remains hindered by challenges such as lo...The development of circularly polarized luminescence (CPL) materials from simple organic molecules is of critical importance for advancing their practical applications, yet it remains hindered by challenges such as low dissymmetry factors (glum) and complex synthetic process. Herein, we report a facile one-step [2+2] condensation strategy to access a Schiff-base pyrene dimer featuring 1,6-substituted pyrenes and trans-1,2-diaminocyclohexane units in 77% yield. Taking advantages of face-to-face π-π stacking of pyrene rings in the constrained D_(2) symmetric structure, intense excimer CPL was successfully realized with a |glum| value of 0.021 and a CPL brightness, BCPL, value of 154.5 M-1·cm-1. The optimized excited state structures reveal that the high |glum| value arises from the parallel arrangement of electric and magnetic dipole transition moments. Importantly, the rigid pyrene dimer architecture ensures robust CPL performance invariant under diverse conditions, including changes in temperature, concentration, and solvents, as well as in polymer films.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
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
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
This study investigates the performance of a new compact(55 cm×56 cm×48 cm)in situ spin-exchange optical pumping ^(3)He neutron spin filter(NSF)system developed at the China Spallation Neutron Source.The enc...This study investigates the performance of a new compact(55 cm×56 cm×48 cm)in situ spin-exchange optical pumping ^(3)He neutron spin filter(NSF)system developed at the China Spallation Neutron Source.The enclosed NSF cell,filled with3He at 2.53 bar,achieved an initial ^(3)He polarization of approximately 60%.After subsequent improvements in the magnetic field and heating system,this in situ system achieved a ^(3)He polarization of 75.66%±0.09%,resulting in 96.30%neutron polarization at 2A.This highly compact in situ system is equipped with self-supportive features,pre-pumping capabilities,polarization maintenance,and a low-noise nuclear magnetic resonance system.These advantages significantly reduce the preparation time and simplify polarized neutron experiments,making it suitable for various neutron beamlines in China,particularly those with a limited sample space.These characteristics establish it as a quasi-standardized system that plays a vital role in polarized neutron experiments,including those involving polarized neutron imaging,neutron reflection,the performance calibration of polarized neutron instruments,and the neutron optics parity and time reversal experiment.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
Metal-complexed chiral macrocyclic architectures have attracted increasing research interests in circularly polarized luminescence owing to their distinctive structural and functional attributes.The method of metal co...Metal-complexed chiral macrocyclic architectures have attracted increasing research interests in circularly polarized luminescence owing to their distinctive structural and functional attributes.The method of metal coordination has emerged as a robust methodology for chirality induction in many systems.In this work,we engineered two rigid and flexible chiral organic ligands(L_(1) and L_(2))by synergizing the inherent planar chirality of pillar[5]arenes with tailored metal-coordination moieties.They demonstrate versatile coordination capabilities toward both 3d-and 4f-block metals,enabling modulation of luminescent characteristics with blue,green and red emissions.Four planar chiral complexes exhibiting CPL activity were synthesized through systematic coordination of L_(1)/L_(2) with Zn^(2+),Eu^(3+),and Tb^(3+).The coordination processes effectively rigidify molecular conformations,leading to an enhanced CPL performance.Particularly,the Tb-L_(2) complex displays superior lanthanide-centered emission with a fluorescence quantum yield of~55%and an emission dissymmetry factor glum=5.5×10^(-3).By engineering the substitution on pillar[5]arene scaffolds,we have established a metal-coordination platform with CPL characteristics,which paves the way in the design of new metal-based luminescent materials.展开更多
The two-dimensional electron gas(2DEG)formed at the interface between two oxide insulators provides new opportunities for electronics and spintronics.The broken inversion symmetry at the heterointerface results in a R...The two-dimensional electron gas(2DEG)formed at the interface between two oxide insulators provides new opportunities for electronics and spintronics.The broken inversion symmetry at the heterointerface results in a Rashba spin-orbit coupling(RSOC)effect that enables the conversion between spin and charge currents.However,conducting oxide interfaces that simultaneously exhibit strong RSOC and high carrier mobility-a combination query for achieving high spin-to-charge inter-conversion efficiencies-remain scarce.Herein,we report a correlated 2DEG with giant Rashba splitting and high electron mobility in(111)-oriented EuTiO_(3)/KTaO_(3)(ETO/KTO)heterostructures under light illumination.Upon light modulation,a unique carrier-dependent giant anomalous Hall effect,the signature of spin-polarized 2DEG,emerges with a sign crossover at a carrier density of approximately 5.0×10^(13)cm^(-2),highlighting dramatic changes in the band topology of KTO(111)interface.Furthermore,at 2 K,the carrier mobility is enhanced from 103 cm^(2)·V^(-1)·s^(-1)to 1800 cm^(2)·V^(-1)·s^(-1),a remarkable enhancement of approximately 20 times.Accompanying with a giant Rashba coefficient αR up to 360meV·˚A,this high mobility ferromagnetic 5d oxide 2DEG is predicted to achieve a giant spin-to-charge conversion efficiency ofλ~10 nm,showing great potential for designing low-power spin-orbitronic devices.展开更多
Due to its broken out-of-plane symmetry,z-cut periodically poled lithium niobate(PPLN)has exhibited ultrahigh second-order optical nonlinearity.Precise quantification of the domain structure of z-cut PPLN plays a crit...Due to its broken out-of-plane symmetry,z-cut periodically poled lithium niobate(PPLN)has exhibited ultrahigh second-order optical nonlinearity.Precise quantification of the domain structure of z-cut PPLN plays a critical role during poling fabrication.To enhance the imaging detection efficiency of the domain structure in z-cut PPLN,we have developed a second-harmonic generation microscope system specifically designed to produce a longitudinal electric field in foci for the imaging domain inversion.We demonstrated that imaging using a longitudinal electric field can achieve a contrast ratio enhancement by a factor of 1.77,showing high imaging efficiency and making the proposed method suitable for in situ monitoring of the z-cut PPLN poling process.展开更多
A millimeter-wave (mmW) broadband dual circularly polarized (dual-CP) antenna with high port isolation is proposed in this paper. The dual-CP performance is realized based on the symmetrical septum circular polarizer ...A millimeter-wave (mmW) broadband dual circularly polarized (dual-CP) antenna with high port isolation is proposed in this paper. The dual-CP performance is realized based on the symmetrical septum circular polarizer based on the gap waveguide (GWG) technology. Two sets of symmetrical septum circular polarizers are used for common aperture combination,achieving the broadband dual-CP characteristics. Taking advantage of GWG structure without good electrical contact, the antenna can also be fabricated and assembled easily in the mmW band. The principle analysis of the antenna is given, and the antenna is simulated and fabricated. The measured results show that the bandwidth for S11lower than-10.7 dB and the axial ratio (AR) lower than 2.90 dB in 75-110 GHz, with realative bandwidth of 38%. Over the frequency band, the gain is higher than 9.16 dBic, and the dual-CP port isolation is greater than32 dB. The proposed antenna with dual-CP and highly isolated in a wide bandwidth range has broad application prospects in the field of mmW communication.展开更多
The complex interplay of magnetic interactions at the yttrium iron garnet(YIG)/ferromagnet interface is important for spintronic and magnonic devices.In this study,we present a comprehensive investigation of the inter...The complex interplay of magnetic interactions at the yttrium iron garnet(YIG)/ferromagnet interface is important for spintronic and magnonic devices.In this study,we present a comprehensive investigation of the interlayer coupling and switching mechanisms in YIG/Py(permalloy)heterostructures based on gadolinium gallium garnet(GGG)and SiO_(2)substrates.We observe antiferromagnetic interlayer coupling between Py and YIG on SiO_(2)substrates,whereas ferromagnetic interlayer coupling is observed on GGG substrates.Using polarized neutron reflectometry with depth-and elementresolved measurements,we obtain an in-depth understanding of the magnetic interactions between the YIG and Py layers.We demonstrate that polycrystalline YIG gives rise to antiferromagnetic interlayer coupling.This work provides valuable insights into designing and controlling magnetic coupling in hybrid structures for spintronic applications.展开更多
We performed real-time and real-space numerical simulations of high-order harmonic generation in the threedimensional structured molecule methane(CH_(4)) using time-dependent density functional theory. By irradiating ...We performed real-time and real-space numerical simulations of high-order harmonic generation in the threedimensional structured molecule methane(CH_(4)) using time-dependent density functional theory. By irradiating the methane molecule with an elliptically polarized laser pulse polarized in the x–y plane, we observed significant even-order harmonic emission in the z-direction. By analyzing the electron dynamics in the electric field and the multi-orbital effects of the molecule, we revealed that electron recombination near specific atoms in methane is the primary source of highorder harmonic generation in the z-direction. Furthermore, we identified the dominant molecular orbitals responsible for the enhancement of harmonics in this direction and demonstrated the critical role played by multi-orbital effects in this process.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
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 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 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.
基金the financial support of the National Natural Science Foundation of China(No.22471057)Natural Science Foundation of Hebei Province(Nos.226Z1501G,B2024205039)+2 种基金Young Scientific and Technological Talents Support Project of Jiangsu Province(JSTJ-2024-426)Jiangsu FundingProgram for Excellent Postdoctoral Talent(2024zB630)We also gratefully acknowledge the support from the National Demonstration Center for Experimental Chemistry Education of Hebei Normal University.
文摘The development of circularly polarized luminescence (CPL) materials from simple organic molecules is of critical importance for advancing their practical applications, yet it remains hindered by challenges such as low dissymmetry factors (glum) and complex synthetic process. Herein, we report a facile one-step [2+2] condensation strategy to access a Schiff-base pyrene dimer featuring 1,6-substituted pyrenes and trans-1,2-diaminocyclohexane units in 77% yield. Taking advantages of face-to-face π-π stacking of pyrene rings in the constrained D_(2) symmetric structure, intense excimer CPL was successfully realized with a |glum| value of 0.021 and a CPL brightness, BCPL, value of 154.5 M-1·cm-1. The optimized excited state structures reveal that the high |glum| value arises from the parallel arrangement of electric and magnetic dipole transition moments. Importantly, the rigid pyrene dimer architecture ensures robust CPL performance invariant under diverse conditions, including changes in temperature, concentration, and solvents, as well as in polymer films.
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.
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supported by the National Science Fund for Distinguished Young Scholars(Grant No.12425512)the National Key Research and Development Program of China(Grant No.2020YFA0406000)+4 种基金the National Natural Science Foundation of China(Grant No.11875265)the Scientific Instrument Developing Project of the Chinese Academy of Sciences(Grant No.ZDKYYQ20190004)the Guangdong Basic and Applied Basic Research Foundation(Grant No.2019B1515120079)Dongguan Introduction Program of Leading Innovative and Entrepreneurial Talents(Grant No.20191122)Guangdong Provincial Key Laboratory of Extreme Conditions,Dongguan Key Laboratory。
文摘This study investigates the performance of a new compact(55 cm×56 cm×48 cm)in situ spin-exchange optical pumping ^(3)He neutron spin filter(NSF)system developed at the China Spallation Neutron Source.The enclosed NSF cell,filled with3He at 2.53 bar,achieved an initial ^(3)He polarization of approximately 60%.After subsequent improvements in the magnetic field and heating system,this in situ system achieved a ^(3)He polarization of 75.66%±0.09%,resulting in 96.30%neutron polarization at 2A.This highly compact in situ system is equipped with self-supportive features,pre-pumping capabilities,polarization maintenance,and a low-noise nuclear magnetic resonance system.These advantages significantly reduce the preparation time and simplify polarized neutron experiments,making it suitable for various neutron beamlines in China,particularly those with a limited sample space.These characteristics establish it as a quasi-standardized system that plays a vital role in polarized neutron experiments,including those involving polarized neutron imaging,neutron reflection,the performance calibration of polarized neutron instruments,and the neutron optics parity and time reversal experiment.
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.
基金supported by the Beijing Natural Science Foundation(No.2232024)the Analysis&Testing Centre at Beijing Institute of Technology for advanced facilities.
文摘Metal-complexed chiral macrocyclic architectures have attracted increasing research interests in circularly polarized luminescence owing to their distinctive structural and functional attributes.The method of metal coordination has emerged as a robust methodology for chirality induction in many systems.In this work,we engineered two rigid and flexible chiral organic ligands(L_(1) and L_(2))by synergizing the inherent planar chirality of pillar[5]arenes with tailored metal-coordination moieties.They demonstrate versatile coordination capabilities toward both 3d-and 4f-block metals,enabling modulation of luminescent characteristics with blue,green and red emissions.Four planar chiral complexes exhibiting CPL activity were synthesized through systematic coordination of L_(1)/L_(2) with Zn^(2+),Eu^(3+),and Tb^(3+).The coordination processes effectively rigidify molecular conformations,leading to an enhanced CPL performance.Particularly,the Tb-L_(2) complex displays superior lanthanide-centered emission with a fluorescence quantum yield of~55%and an emission dissymmetry factor glum=5.5×10^(-3).By engineering the substitution on pillar[5]arene scaffolds,we have established a metal-coordination platform with CPL characteristics,which paves the way in the design of new metal-based luminescent materials.
基金supported by the Science Center of the National Science Foundation of China(Grant No.52088101)the National Key Research and Development Program of China(Grant Nos.2023YFA1406400,2021YFA1400300,and 2023YFA1607403)the National Natural Science Foundation of China(Grant Nos.T2394472 and T2394470).
文摘The two-dimensional electron gas(2DEG)formed at the interface between two oxide insulators provides new opportunities for electronics and spintronics.The broken inversion symmetry at the heterointerface results in a Rashba spin-orbit coupling(RSOC)effect that enables the conversion between spin and charge currents.However,conducting oxide interfaces that simultaneously exhibit strong RSOC and high carrier mobility-a combination query for achieving high spin-to-charge inter-conversion efficiencies-remain scarce.Herein,we report a correlated 2DEG with giant Rashba splitting and high electron mobility in(111)-oriented EuTiO_(3)/KTaO_(3)(ETO/KTO)heterostructures under light illumination.Upon light modulation,a unique carrier-dependent giant anomalous Hall effect,the signature of spin-polarized 2DEG,emerges with a sign crossover at a carrier density of approximately 5.0×10^(13)cm^(-2),highlighting dramatic changes in the band topology of KTO(111)interface.Furthermore,at 2 K,the carrier mobility is enhanced from 103 cm^(2)·V^(-1)·s^(-1)to 1800 cm^(2)·V^(-1)·s^(-1),a remarkable enhancement of approximately 20 times.Accompanying with a giant Rashba coefficient αR up to 360meV·˚A,this high mobility ferromagnetic 5d oxide 2DEG is predicted to achieve a giant spin-to-charge conversion efficiency ofλ~10 nm,showing great potential for designing low-power spin-orbitronic devices.
基金supported by the National Key Research and Development Program of China(Grant Nos.2022YFC3401100 and 2022YFF0712500)the Guangdong Major Project of Basic and Applied Basic Research(Grant No.2020B0301030009)+2 种基金the National Natural Science Foundation of China(Grant Nos.12204017,12004012,12004013,12041602,91750203,91850111,and 92150301)the China Postdoctoral Science Foundation(Grant No.2020M680220 and 2020M680230)the Clinical Medicine Plus X-Young Scholars Project,Peking University,Fundamental Research Funds for the Central Universities.
文摘Due to its broken out-of-plane symmetry,z-cut periodically poled lithium niobate(PPLN)has exhibited ultrahigh second-order optical nonlinearity.Precise quantification of the domain structure of z-cut PPLN plays a critical role during poling fabrication.To enhance the imaging detection efficiency of the domain structure in z-cut PPLN,we have developed a second-harmonic generation microscope system specifically designed to produce a longitudinal electric field in foci for the imaging domain inversion.We demonstrated that imaging using a longitudinal electric field can achieve a contrast ratio enhancement by a factor of 1.77,showing high imaging efficiency and making the proposed method suitable for in situ monitoring of the z-cut PPLN poling process.
文摘A millimeter-wave (mmW) broadband dual circularly polarized (dual-CP) antenna with high port isolation is proposed in this paper. The dual-CP performance is realized based on the symmetrical septum circular polarizer based on the gap waveguide (GWG) technology. Two sets of symmetrical septum circular polarizers are used for common aperture combination,achieving the broadband dual-CP characteristics. Taking advantage of GWG structure without good electrical contact, the antenna can also be fabricated and assembled easily in the mmW band. The principle analysis of the antenna is given, and the antenna is simulated and fabricated. The measured results show that the bandwidth for S11lower than-10.7 dB and the axial ratio (AR) lower than 2.90 dB in 75-110 GHz, with realative bandwidth of 38%. Over the frequency band, the gain is higher than 9.16 dBic, and the dual-CP port isolation is greater than32 dB. The proposed antenna with dual-CP and highly isolated in a wide bandwidth range has broad application prospects in the field of mmW communication.
基金supported by the National Key Basic Research Program of China(Grant Nos.2021YFA1400300 and 2023YFA1610400)the National Natural Science Foundation of China(Grant Nos.12204268,52371169,52130103,and U22A20263)+1 种基金the Guangdong Basic and Applied Basic Research Foundation(Grant No.2023B1515120015)the Open Research Fund of Songshan Lake Materials Laboratory(Grant No.2022SLABFN13)。
文摘The complex interplay of magnetic interactions at the yttrium iron garnet(YIG)/ferromagnet interface is important for spintronic and magnonic devices.In this study,we present a comprehensive investigation of the interlayer coupling and switching mechanisms in YIG/Py(permalloy)heterostructures based on gadolinium gallium garnet(GGG)and SiO_(2)substrates.We observe antiferromagnetic interlayer coupling between Py and YIG on SiO_(2)substrates,whereas ferromagnetic interlayer coupling is observed on GGG substrates.Using polarized neutron reflectometry with depth-and elementresolved measurements,we obtain an in-depth understanding of the magnetic interactions between the YIG and Py layers.We demonstrate that polycrystalline YIG gives rise to antiferromagnetic interlayer coupling.This work provides valuable insights into designing and controlling magnetic coupling in hybrid structures for spintronic applications.
基金Project supported by the National Natural Science Foundation of China (Grant No. 12204214)the National Key Research and Development Program of China (Grant No. 2022YFE0134200)+1 种基金the Fundamental Research Funds for the Central Universities (Grant No. GK202207012), QCYRCXM-2022-241the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2025A1515011117)。
文摘We performed real-time and real-space numerical simulations of high-order harmonic generation in the threedimensional structured molecule methane(CH_(4)) using time-dependent density functional theory. By irradiating the methane molecule with an elliptically polarized laser pulse polarized in the x–y plane, we observed significant even-order harmonic emission in the z-direction. By analyzing the electron dynamics in the electric field and the multi-orbital effects of the molecule, we revealed that electron recombination near specific atoms in methane is the primary source of highorder harmonic generation in the z-direction. Furthermore, we identified the dominant molecular orbitals responsible for the enhancement of harmonics in this direction and demonstrated the critical role played by multi-orbital effects in this process.
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.
