Plasmonic nanolasers are transitioning from empirical optimization to a new paradigm driven by physical mechanisms.Owing to the lack of guidance from internal mechanisms,this transformation process remains highly chal...Plasmonic nanolasers are transitioning from empirical optimization to a new paradigm driven by physical mechanisms.Owing to the lack of guidance from internal mechanisms,this transformation process remains highly challenging.Therefore,elucidating the governing nanoscale light–matter interactions has become essential for unlocking their full performance potential.In this paper,we establish a framework that connects the strength of exciton–plasmon interactions with plasmonic nanolaser performance.The evolution of the laser spectrum under increasing pumping fluence,reflected by variations in intensity,spectral peak position,and full width at half maximum,provides clear evidence of exciton–plasmon interactions.These interactions are further verified by changes in the emission lifetime with incident fluence,and it is found that the lifetime variation correlates with the change in spectral full width at half maximum.Furthermore,we calculate and analyze various loss mechanisms in plasmonic nanolasers,revealing how the strength of exciton–plasmon interactions actively modulates optical loss channels and fundamentally controls the lasing threshold.Understanding exciton–plasmon interaction dynamics is not merely a theoretical pursuit but a critical step toward realizing truly practical and scalable nanophotonic devices.展开更多
Styrene epoxidation is a crucial reaction in the chemical industry.However,low Faradaic efficiency(FE)and product selectivity severely limit the efficiency of(photo)electrocatalytic styrene epoxidation processes.This ...Styrene epoxidation is a crucial reaction in the chemical industry.However,low Faradaic efficiency(FE)and product selectivity severely limit the efficiency of(photo)electrocatalytic styrene epoxidation processes.This study designs an efficient photothermal catalytic system based on an Au/NiCo_(2)O_(4)photoanode,which achieves the product selectivity of 98%and FE of 96%for bromide-mediated styrene epoxidation when the styrene conversion reaches 94%,surpassing most current reports on photoelectrocatalytic styrene epoxidation.A comprehensive mechanistic study reveals that the photothermal effect of the Au/NiCo_(2)O_(4)photoanode enhances local temperature,which facilitates bromine species mass transfer,reduces reaction activation energy and accelerates the oxidation kinetics of Br^(-).This study elucidates the photothermal-driven reaction mechanism of styrene epoxidation,providing guidelines for designing efficient and stable photothermal catalytic technologies.展开更多
Tunable plasmonic structures provide the possibility to actively modify the radiation from atoms through electromagnetic coupling.In this paper,we investigate the decay and radiation behavior of an atom near a dielect...Tunable plasmonic structures provide the possibility to actively modify the radiation from atoms through electromagnetic coupling.In this paper,we investigate the decay and radiation behavior of an atom near a dielectric nanosphere with conductive surface within the framework of macroscopic quantum electrodynamics.The electromagnetic fields including the losses in the materials can be taken as fundamental excitations which interact with the atom through a transition dipole.Both weak and strong coupling regimes have been investigated.The decay rate and the angle-dependent light intensities indeed strongly depend on the parameters of the system,i.e.,the position and orientation of the dipole,the geometric size,and the surface conductivity,providing the opportunity of artificial control over these quantities.Generalizing the formalism in this paper to other systems,like metamaterials,is straightforward,which we believe may pave a way for future active quantum nanophotonic devices.展开更多
The limited redox capability of photocatalysts often leads to harmful NO_(2) byproduct formation during photocatalytic NO oxidation.Herein,Bi_(4)Ti_(3)O_(12) nanosheets modified with plasmonic metallic bismuth and abu...The limited redox capability of photocatalysts often leads to harmful NO_(2) byproduct formation during photocatalytic NO oxidation.Herein,Bi_(4)Ti_(3)O_(12) nanosheets modified with plasmonic metallic bismuth and abundant oxygen vacancies were synthesized via an in-situ reduction method.The optimized catalyst(BTOR2,with a molar ratio of 40%NaBH_(4) to Bi_(4)Ti_(3)O_(12))achieved a maximum NO removal efficiency of 62.3%,significantly higher than pristine Bi_(4)Ti_(3)O_(12)(40.5%) while minimizing NO_(2) production.The results reveal that the synergistic effects of Bi’s plasmonic resonance and oxygen vacancies enhanced visible light absorption and charge separation.The density functional theory(DFT)analysis showed electrons can transfer from Bi_(4)Ti_(3)O_(12)to Bi,promoting O_(2)activation to·O_(2)^(-)radicals.In-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)confirmed that light-induced H2O adsorption was strengthened,improving·OH radical generation.These radicals promoted the selective conversion of activated NO-to NO_(3)^(-),rather than NO_(2).This work provides valuable insights for advancing research into efficient photocatalysts for air pollution control.展开更多
Chiroptical responses of chiral plasmonic nanoparticles are influenced by their morphology, yet the impact of supporting substrates is significant but not fully understood. In this study, we numerically investigate th...Chiroptical responses of chiral plasmonic nanoparticles are influenced by their morphology, yet the impact of supporting substrates is significant but not fully understood. In this study, we numerically investigate the effect of high-refractive-index dielectric substrates on the chiroptical response of individual chiral plasmonic nanoparticles. Using Au helicoid as an example, we observe that as the refractive index of the supporting substrate increases, there is a remarkable enhancement in the dissymmetry factor(g-factor), along with an abnormal peak separation between the absorption and scattering g-factor spectra, which is different from typical observations. This unique chiroptical evolution is attributed to the strong plasmon hybridization under circularly polarized in-plane excitation. To validate the universality of these findings, we vary the size and material of the helicoid, confirming the consistent occurrence of this phenomenon. Our findings provide valuable insights into the substrate effect of chiral plasmonic nanoparticles to facilitate their applications in on-chip devices and sensing technologies.展开更多
A D-type photonic crystal fiber(PCF) sensor based on surface plasmon resonance(SPR) principle is designed.In order to excite the SPR effect,a gold film is plated on the open-loop channel of the sensor,the free electro...A D-type photonic crystal fiber(PCF) sensor based on surface plasmon resonance(SPR) principle is designed.In order to excite the SPR effect,a gold film is plated on the open-loop channel of the sensor,the free electrons in a metal are resonated with photons.The structural parameters are fine-tuned and the sensing performance of the sensor is studied.The results show that the maximum spectral sensitivity reaches 18 000 nm/RIU in the refractive index range of 1.24—1.32,and the maximum resolution is 5.56×10^(-6) RIU.The novel structure with high sensitivity and low refractive index provides a new perspective for fluid density detection.展开更多
Achieving the precise control over high-quality(Q)resonances,particularly bound states in the continuum(BICs),within plasmonic metasurfaces remains a substantial challenge due to inherent material losses,which can und...Achieving the precise control over high-quality(Q)resonances,particularly bound states in the continuum(BICs),within plasmonic metasurfaces remains a substantial challenge due to inherent material losses,which can undermine the modulation efficiency and device performance in practical settings.Here,we introduce a mechanism,termed dual-channel-driven BICs,which exploits the cross-coupling between surface plasmon polaritons and guided mode resonances to enable the delicate formation and manipulation of high-Q bound states in dissipative plasmonic platforms.展开更多
Periodic metal nanoarrays serving as cavities can support directional-tunable amplified spontaneous emission that goes beyond the diffraction limit due to the hybrid states of surface plasmons and Bloch surface waves....Periodic metal nanoarrays serving as cavities can support directional-tunable amplified spontaneous emission that goes beyond the diffraction limit due to the hybrid states of surface plasmons and Bloch surface waves.Most of these modes'interactions remain within the weak coupling regime,yet strong coupling is also anticipated to occur.In this work,we present an intriguing case of amplified spontaneous emission(ASE),amplified by the splitting upper polariton mode within a strong coupling system,stemming from a square lattice of plasmonic cone lattices(PCLs).The PCLs are fabricated using an anodized aluminum oxide membrane(AAO),which facilitates strong coupling between surface plasmons and Bloch surface wave modes,with the maximum Rabi splitting observed at 0.258 eV for the sample with an aspect ratio of 0.33.A 13.5-fold increase in amplified spontaneous emission is recorded when the emission from Nile Red coincides with this flat energy branch of upper polariton,which exhibits a high photon density of states.Reduced group velocity can prolong photon lifetime and boost the probability of light-matter interaction.The observed ASE phenomenon in this strong coupling plasmonic system widens the scope for applications in nanolasing and polariton lasing.展开更多
We propose an effective surface plasmon resonance system designed to achieve both negative and positive Goos–H??nchen shifts in reflected light.This system comprises a metal film and an underlying medium,where the re...We propose an effective surface plasmon resonance system designed to achieve both negative and positive Goos–H??nchen shifts in reflected light.This system comprises a metal film and an underlying medium,where the real part of the permittivity of the underlying medium must be less than unity.Surface plasmon polaritons can be excited at the lower surface of the metal when light is incident from the air onto the upper surface of the metal.The excitation of surface plasmon polaritons leads to the exploration of the Goos–H??nchen shift(G–HS).Control over the negative and positive(G–HS)is investigated via the wavelength of the incident light.The magnitude of the G–HS is strongly dependent on the incident wavelength.A remarkable enhancement of both negative and positive G–HS in the reflected light is achieved at certain wavelengths and incident angles.Our system paves the way for exploring different characteristics of optical switching and micro-sensors with very high precision.展开更多
Plasmonic colors are attracting attention for their subwavelength small size,vibrant hues,and environmental sustainability beyond traditional pigments while suffering from angular and/or polarization dependency due to...Plasmonic colors are attracting attention for their subwavelength small size,vibrant hues,and environmental sustainability beyond traditional pigments while suffering from angular and/or polarization dependency due to distinct excitations of lattice resonances and/or surface plasmon polaritons(SPPs).Here,we demonstrate the sodium metasurface-based plasmonic color palettes with polarization-independent wide-view angle(approximately>〓〓60 deg in experiment and up to〓〓90 deg in theory)and single-particlelevel pixel size(down to∼60 nm)that integrate both pigment-like and structure coloring advantages,fabricated by the templated nanorod-pixelated solidification of wetted liquid metals.Such intriguing performances are mainly attributed to the particle plasmon dominant spectral response by steering the filling profile and thus the interplay between localized surface plasmons and SPPs.Combining low material cost,potentially scalable manufacturing process,and pronounced optical performance,the proposed sodium-based metasurfaces will provide a promising route for advanced color information technology.展开更多
Meta-devices have significantly revitalized the study of nonlinear optical phenomena.At the nanoscale,the detrimental effects of phase mismatching between fundamental and harmonic waves can be substantially reduced.Th...Meta-devices have significantly revitalized the study of nonlinear optical phenomena.At the nanoscale,the detrimental effects of phase mismatching between fundamental and harmonic waves can be substantially reduced.This review analyzes the theoretical frameworks of how plasmonic and dielectric materials induce nonlinear optical properties.Plasmonic and dielectric nonlinear meta-devices that can excite strong resonant modes for efficiency enhancement are explored.We outline different strategies designed to shape the radiation pattern in order to increase the collection capability of nonlinear signals emitted from meta-devices.In addition,we discuss how nonlinear phase manipulation in meta-devices can integrate the benefits of efficiency enhancement and radiation shaping,not only boosting the energy density of the nonlinear signal but also facilitating a wide range of applications.Finally,potential research directions within this field are discussed.展开更多
Structural engineering enhances plasmonic stability and amplifies localized electric fields,yet the limited intrinsic activity of plasmonic materials necessitates integrating catalytic active sites.Herein,we design a ...Structural engineering enhances plasmonic stability and amplifies localized electric fields,yet the limited intrinsic activity of plasmonic materials necessitates integrating catalytic active sites.Herein,we design a yolk@shell nanoreactor featuring dual-plasmonic Au@CuS core-shell structures encapsulated by sulfur vacancy-rich ZnIn2S4(Sv-ZIS).The electromagnetic“hotspots”from Au and CuS near-field coupling concentrate incident light to boost hot-carrier generation and migration while sulfur vacancies in Sv-ZIS promote hydrogen evolution.This dual mechanism synergistically achieves 86.3 mmol g^(-1)h-1of H2production(65.6%quantum efficiency at 420 nm),maintaining 48.3 mmol g^(-1)h-1at 6℃.Density functional theory(DFT)simulations demonstrate that sulfur vacancies not only reduce the H*adsorption energy barrier from 0.87 to 0.11 eV but also amplify the interfacial electric field strength by 9%.Vacancy-redirected fields favor proton reduction pathways,accelerating charge transfer kinetics.Comparative studies confirm the universal superiority of dual-plasmonic architecture,while Sv-ZIS shells exhibit optimized activity through defect-mediated electronic interactions.This work provides a blueprint for bridging plasmonic field enhancement and defect engineering in multi-component photocatalysts.展开更多
Vortex beams carrying orbital angular momentum(OAM)are of great significance for high-capacity communication and super-resolution imaging.However,there is a huge gap between the free-space vortices(FVs)and plasmonic v...Vortex beams carrying orbital angular momentum(OAM)are of great significance for high-capacity communication and super-resolution imaging.However,there is a huge gap between the free-space vortices(FVs)and plasmonic vortices(PVs)on chips,and active manipulation as well as multiplexing in more channels have become a pressing demand.In this work,we demonstrate a terahertz(THz)cascaded metadevice composed of a helical plasmonic metasurface,a liquid crystal(LC)layer,and a helical dielectric metasurface.By spin-orbital angular momentum coupling and photon state superposition,PVs and FVs are generated with mode purity of over 85%on average.Due to the inversion asymmetric design of the helical metasurfaces,the parity symmetry breaking of OAM is realized(the topological charge numbers no longer occur in positive and negative pairs,but all are positive),generating 6 independent channels associated with the decoupled spin states and the near-/far-field positions.Moreover,by the LC integration,dynamic mode switching and energy distribution can be realized,finally obtaining up to 12 modes with a modulation ratio of above 70%.This active tuning and multi-channel multiplexing metadevice establishes a bridge connection between the PVs and FVs,exhibiting promising applications in THz communication,intelligent perception,and information processing.展开更多
Hybrid organic-inorganic perovskite photodetectors have gained significant attention due to their superior potential for optoelectronic applications,offering various advantages such as low-cost processing,high charge ...Hybrid organic-inorganic perovskite photodetectors have gained significant attention due to their superior potential for optoelectronic applications,offering various advantages such as low-cost processing,high charge carrier mobility,and lightweight properties.However,these perovskite photodetectors exhibit relatively low absorption in the near-infrared(NIR)range,which limits their potential applications.Here,to address this challenge,the integration of gold nanorods(Au NRs)utilizing localized surface plasmon resonance(LSPR)effects in the NIR range has been developed,leading to enhanced light absorption in the active region and higher photocurrent generation.Additionally,∼7.9 nm of thin polyethyleneimine ethoxylated(PEIE)interlayers were incorporated into the Au NR photodetectors,suppressing dark current by blocking charge injection.As a result,the synergistic effect of the Au NR/PEIE hybrid layer has led to a high-performance photodetector with a responsivity of 0.360 A/W and a detectivity of 1.81×10^(10) Jones,demonstrating a noticeable enhancement compared to the control device.Finite-difference time-domain(FDTD)simulations,morphological characterizations,and photoluminescence studies further support the mechanism for enhancing the performance of the device.We believe that our plasmon-enhanced protocol holds strong potential as a promising platform for perovskite optoelectronic devices.展开更多
Bisphenol S(BPS)is an environmental endocrine disruptor that poses substantial risks to both ecosystems and human health.Its widespread occurrence necessitates the development of sensitive,rapid,cost-effective,and fie...Bisphenol S(BPS)is an environmental endocrine disruptor that poses substantial risks to both ecosystems and human health.Its widespread occurrence necessitates the development of sensitive,rapid,cost-effective,and field-deployable analytical tools for environmental monitoring.Herein,we developed a plasmon-enhanced CdIn_(2)S_(4)/Bi_(2)WO_(6)Z-scheme heterojunction to construct a photoelectrochemical(PEC)aptasensor for BPS detection.The Z-scheme configuration between CdIn_(2)S_(4)and Bi_(2)WO_(6)significantly enhances the PEC response by suppressing recombination of photogenerated electronhole pairs.Further integration with gold nanoparticles(AuNPs)amplifies the photocurrent through the surface plasmon resonance(SPR)effect,yielding a highly efficient PEC sensing platform.A BPS-specific aptamer was immobilized on the electrode to enable selective target capture.The resulting aptamer-target complex,upon exposure to BPS,impedes interfacial electron transfer,resulting in a concentration-dependent decrease in the photocurrent.The PEC aptasensor exhibited a wide linear detection range of 5 nM to 50μM and a detection limit of 0.64 nM.The sensor demonstrated high selectivity against structurally similar interfering substances.Application to real water samples yielded results consistent with that of HPLC-MS/MS,confirming the sensor's reliability and practical applicability.This work establishes a sensitive,rapid,and robust PEC strategy for monitoring BPS in complex environmental matrices with potential for routine environmental analysis.展开更多
Tamm plasmon polaritons(TPPs)are localized photonic states at the interface between a metal layer and one-dimensional(1D)photonic crystal substrate.Unlike surface plasmon polaritons(SPPs),TPPs can be excited by both t...Tamm plasmon polaritons(TPPs)are localized photonic states at the interface between a metal layer and one-dimensional(1D)photonic crystal substrate.Unlike surface plasmon polaritons(SPPs),TPPs can be excited by both transverse magnetic and electric waves without requiring additional coupling optics.TPPs offer robust color filtering,making them ideal for applications such as complementary metal oxide semiconductor(CMOS)image detectors.However,obtaining a large-area,reversible,and reconfigurable filter remains challenging.This study demonstrates a dynamically reconfigurable reflective color filter by integrating an ultrathin antimony trisulfide(Sb_(2)S_(3))layer with Tamm plasmonic photonic crystals.Reconfigurable tuning was achieved by inducing Sb_(2)S_(3) crystallization and reamorphization via thermal and optical activation,respectively.The material exhibited good stability after multiple switching cycles.The reflectance spectrum can be tuned across the visible range,with a shift of approximately 50 nm by switching Sb_(2)S_(3) between its amorphous and crystalline phases.This phase transition is nonvolatile and substantially minimizes the energy consumption,enhancing efficiency for practical applications.Tamm plasmonic photonic crystals are low-cost and large-scale production,offering a platform for compact color display systems and customizable photonic crystal filters for realistic system integration.展开更多
Confronting the escalating global challenge of counterfeit products,developing advanced anticounterfeiting materials and structures with physical unclonable functions(PUFs)has become imperative.All-optical PUFs,distin...Confronting the escalating global challenge of counterfeit products,developing advanced anticounterfeiting materials and structures with physical unclonable functions(PUFs)has become imperative.All-optical PUFs,distinguished by their high output complexity and expansive response space,offer a promising alternative to conventional electronic counterparts.For practical authentications,the expansion of optical PUF keys usually involves intricate spatial or spectral shaping of excitation light using bulky external apparatus,which largely hinders the applications of optical PUFs.Here,we report a plasmonic PUF system based on heterogeneous nanostructures.The template-assisted shadow deposition technique was employed to adjust the morphological diversity of densely packed metal nanoparticles in individual PUFs.Transmission images were processed via a hash algorithm,and the generated PUF keys with a scalable capacity from 2875 to 243401 exhibit excellent uniqueness,randomness,and reproducibility.Furthermore,the wavelength and the polarization state of the excitation light are harnessed as two distinct expanding strategies,offering the potential for multiscenario applications via a single PUF.Overall,our reported plasmonic PUFs operated with the multidimensional expanding strategy are envisaged to serve as easy-to-integrate,easy-to-use systems and promise efficacy across a broad spectrum of applications,from anticounterfeiting to data encryption and authentication.展开更多
The construction of a well-defined and efficient Z-scheme heterostructure with enhanced photogenerated charge carriers and their rapid transfer is vital for realizing efficient photocatalytic hydrogen production,to ac...The construction of a well-defined and efficient Z-scheme heterostructure with enhanced photogenerated charge carriers and their rapid transfer is vital for realizing efficient photocatalytic hydrogen production,to achieve carbon neutrality.Herein,we study the H_(2)evolution reaction by rationally constructing a hybrid Au-anchored UiO-66-NH_(2)with localized surface plasmon resonance(LSPR)properties,embedded with ZnIn_(2)S_(4)/MoS_(2)nanosheets.Interestingly,the synergistic effect of excellent heterojunction,tunes additional catalytic active sites,provides effective separation of photogenerated charges at the junction interface and establishes a dedicated microenvironment for the boosted electron transfer.Notably,the optimized hybrid photocatalyst(Au6@U6N)15/ZIS/MS5 exhibits highly efficient H_(2)generation of 58.2 mmol g^(-1)h^(-1),which is almost 16 and 1.5 folds of the pristine ZIS and MS/U6N/ZIS,correspondingly.It has an apparent quantum efficiency of 19.6%at a wavelength of 420 nm,surpassing several reported MOF-based ZnIn_(2)S_(4)photocatalytic H_(2)evolution activities.Significantly,this research provides insights into the design of interface-engineered plasmonic MOF with layered encapsulated heterostructures that elucidate the role of plasmonic LSPR effect and efficiently regulate the charge transfer with enhanced microchannels,hence boosting the visible-light-driven photocatalytic activity for realizing efficient green energy conversion.展开更多
The increasing importance of high-purity isopropyl alcohol(IPA)in semiconductor processing technology has led to a higher demand for technologies capable of detecting impurities in IPA.Although accurate and various im...The increasing importance of high-purity isopropyl alcohol(IPA)in semiconductor processing technology has led to a higher demand for technologies capable of detecting impurities in IPA.Although accurate and various impurity detection technologies have been developed,most of them have limitations in real-time and repeatable detection of impurities.Herein,for the first time,surface plasmon resonance(SPR)sensor was developed utilizing graphene transferred Au film(Au/graphene)to detect sub-ppm levels of 2,4-dinitrophenol(2,4-DNP)dissolved in IPA and this sensor demonstrates the ability to detect 2,4-DNP in real-time with great reversibility.The adsorption of 2,4-DNP to graphene is found to be stronger than that for Au film because of noncovalent graphene p–p stacking interaction,and the effect of graphene is demonstrated through density function theory(DFT)calculations and enhancement in sensing performance of Au/graphene sensor.Additionally,the presence of noncovalent p–p stacking interaction between 2,4-DNP and graphene has been demonstrated by confirming the p-doping effect of graphene-based solution field-effect transistor measurements and consecutive Raman spectra analysis.This study offers experimental and theoretical insights into the adsorption kinetics of 2,4-DNP dissolved in IPA and provides promising perspectives for real-time sensing technology utilizing label-free graphene to detect impurities in high-purity cleaning agents.展开更多
Negative friction refers to a frictional force that acts in the same direction as the motion of an object, which has been predicted in terahertz(THz) gain systems [Phys. Rev. B 108 045406(2023)]. In this work, we inve...Negative friction refers to a frictional force that acts in the same direction as the motion of an object, which has been predicted in terahertz(THz) gain systems [Phys. Rev. B 108 045406(2023)]. In this work, we investigate the enhancement of the negative friction experienced by nanospheres placed near a graphene substrate. We find that the magnitude of negative friction is related to the resonant coupling between the surface plasmon polaritons(SPPs) of the graphene and localized surface phonon polaritons(LSPh P) of nanospheres. We exam nanospheres consisted of several different materials, including SiO_(2), Si C, Zn Se, Na Cl, ln Sb. Our results suggest that the LSPh P of Na Cl nanospheres match effectively with the amplified SPPs of graphene sheets. The negative friction for Na Cl nanospheres can be enhanced about one-to-two orders of magnitude compared to that of silica(SiO_(2)) nanospheres. At the resonant peak of negative friction, the required quasi-Fermi energy of graphene is lower for Na Cl nanospheres. Our finds hold great prospects for the mechanical manipulations of nanoscale particles.展开更多
基金supported by the Natural Science Foundation of Anhui Jianzhu University(Grant No.2023QDZ05)the National Natural Science Foundation of China(Grant Nos.62204127 and 12304453)the Shanxi Province Science Foundation for Youths(Grant No.202503021212220)。
文摘Plasmonic nanolasers are transitioning from empirical optimization to a new paradigm driven by physical mechanisms.Owing to the lack of guidance from internal mechanisms,this transformation process remains highly challenging.Therefore,elucidating the governing nanoscale light–matter interactions has become essential for unlocking their full performance potential.In this paper,we establish a framework that connects the strength of exciton–plasmon interactions with plasmonic nanolaser performance.The evolution of the laser spectrum under increasing pumping fluence,reflected by variations in intensity,spectral peak position,and full width at half maximum,provides clear evidence of exciton–plasmon interactions.These interactions are further verified by changes in the emission lifetime with incident fluence,and it is found that the lifetime variation correlates with the change in spectral full width at half maximum.Furthermore,we calculate and analyze various loss mechanisms in plasmonic nanolasers,revealing how the strength of exciton–plasmon interactions actively modulates optical loss channels and fundamentally controls the lasing threshold.Understanding exciton–plasmon interaction dynamics is not merely a theoretical pursuit but a critical step toward realizing truly practical and scalable nanophotonic devices.
基金supported by the National Key R&D Program of China(2022YFA1505000)。
文摘Styrene epoxidation is a crucial reaction in the chemical industry.However,low Faradaic efficiency(FE)and product selectivity severely limit the efficiency of(photo)electrocatalytic styrene epoxidation processes.This study designs an efficient photothermal catalytic system based on an Au/NiCo_(2)O_(4)photoanode,which achieves the product selectivity of 98%and FE of 96%for bromide-mediated styrene epoxidation when the styrene conversion reaches 94%,surpassing most current reports on photoelectrocatalytic styrene epoxidation.A comprehensive mechanistic study reveals that the photothermal effect of the Au/NiCo_(2)O_(4)photoanode enhances local temperature,which facilitates bromine species mass transfer,reduces reaction activation energy and accelerates the oxidation kinetics of Br^(-).This study elucidates the photothermal-driven reaction mechanism of styrene epoxidation,providing guidelines for designing efficient and stable photothermal catalytic technologies.
基金supported by Hangzhou Dianzi University(Grant No.KYS075621018)supported by the Natural Science Foundation of Zhejiang Province(Grant No.LY24A050004)。
文摘Tunable plasmonic structures provide the possibility to actively modify the radiation from atoms through electromagnetic coupling.In this paper,we investigate the decay and radiation behavior of an atom near a dielectric nanosphere with conductive surface within the framework of macroscopic quantum electrodynamics.The electromagnetic fields including the losses in the materials can be taken as fundamental excitations which interact with the atom through a transition dipole.Both weak and strong coupling regimes have been investigated.The decay rate and the angle-dependent light intensities indeed strongly depend on the parameters of the system,i.e.,the position and orientation of the dipole,the geometric size,and the surface conductivity,providing the opportunity of artificial control over these quantities.Generalizing the formalism in this paper to other systems,like metamaterials,is straightforward,which we believe may pave a way for future active quantum nanophotonic devices.
基金supported by the Natural Science Foundation of Chongqing(Nos.CSTB2024NSCQ-MSX1278,CSTB2023NSCQ-MSX0006)Technology Innovation Project of Shapingba District,Chongqing(No.2024004)+2 种基金Science and Technology Research Program of Chongqing Municipal Education Commission(Nos.KJZD-K202403102,KJQN202103110,KJQN202400512,KJQN202403107)National Natural Science Foundation of China(No.22406014)China Postdoctoral Science Foundation(No.2023MD744137).
文摘The limited redox capability of photocatalysts often leads to harmful NO_(2) byproduct formation during photocatalytic NO oxidation.Herein,Bi_(4)Ti_(3)O_(12) nanosheets modified with plasmonic metallic bismuth and abundant oxygen vacancies were synthesized via an in-situ reduction method.The optimized catalyst(BTOR2,with a molar ratio of 40%NaBH_(4) to Bi_(4)Ti_(3)O_(12))achieved a maximum NO removal efficiency of 62.3%,significantly higher than pristine Bi_(4)Ti_(3)O_(12)(40.5%) while minimizing NO_(2) production.The results reveal that the synergistic effects of Bi’s plasmonic resonance and oxygen vacancies enhanced visible light absorption and charge separation.The density functional theory(DFT)analysis showed electrons can transfer from Bi_(4)Ti_(3)O_(12)to Bi,promoting O_(2)activation to·O_(2)^(-)radicals.In-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)confirmed that light-induced H2O adsorption was strengthened,improving·OH radical generation.These radicals promoted the selective conversion of activated NO-to NO_(3)^(-),rather than NO_(2).This work provides valuable insights for advancing research into efficient photocatalysts for air pollution control.
基金supported by the National Natural Science Foundation of China(Grant Nos.62575185 and 62205223)Guangdong Basic and Applied Basic Research Foundation (Grant Nos.2023A1515110091 and 2023A1515011455)+1 种基金Department of Science and Technology of Guangdong Province(Grant Nos.2023QN10C200 and 2023QN10X082)Science and Technology Innovation Commission of Shenzhen (Grant Nos.20231121120748002 and JSGGKQTD20221101115701006)。
文摘Chiroptical responses of chiral plasmonic nanoparticles are influenced by their morphology, yet the impact of supporting substrates is significant but not fully understood. In this study, we numerically investigate the effect of high-refractive-index dielectric substrates on the chiroptical response of individual chiral plasmonic nanoparticles. Using Au helicoid as an example, we observe that as the refractive index of the supporting substrate increases, there is a remarkable enhancement in the dissymmetry factor(g-factor), along with an abnormal peak separation between the absorption and scattering g-factor spectra, which is different from typical observations. This unique chiroptical evolution is attributed to the strong plasmon hybridization under circularly polarized in-plane excitation. To validate the universality of these findings, we vary the size and material of the helicoid, confirming the consistent occurrence of this phenomenon. Our findings provide valuable insights into the substrate effect of chiral plasmonic nanoparticles to facilitate their applications in on-chip devices and sensing technologies.
基金supported by the Natural Science Foundation of Tianjin City (No.19JCYBJC17000)the National Natural Science Foundation of China (No.11905159)。
文摘A D-type photonic crystal fiber(PCF) sensor based on surface plasmon resonance(SPR) principle is designed.In order to excite the SPR effect,a gold film is plated on the open-loop channel of the sensor,the free electrons in a metal are resonated with photons.The structural parameters are fine-tuned and the sensing performance of the sensor is studied.The results show that the maximum spectral sensitivity reaches 18 000 nm/RIU in the refractive index range of 1.24—1.32,and the maximum resolution is 5.56×10^(-6) RIU.The novel structure with high sensitivity and low refractive index provides a new perspective for fluid density detection.
基金National Natural Science Foundation of China(12004121,22202162)Natural Science Foundation of Fujian Province(2024J01080)+1 种基金Fundamental Research Funds for the Central Universities(ZQN-1006)Scientific Research Funds of Huaqiao University(605-50X19028)。
文摘Achieving the precise control over high-quality(Q)resonances,particularly bound states in the continuum(BICs),within plasmonic metasurfaces remains a substantial challenge due to inherent material losses,which can undermine the modulation efficiency and device performance in practical settings.Here,we introduce a mechanism,termed dual-channel-driven BICs,which exploits the cross-coupling between surface plasmon polaritons and guided mode resonances to enable the delicate formation and manipulation of high-Q bound states in dissipative plasmonic platforms.
基金financial supports from National Natural Science Foundation of China(No.61905051)Natural Science Foundation of Heilongjiang Province(No.LH2020F027).
文摘Periodic metal nanoarrays serving as cavities can support directional-tunable amplified spontaneous emission that goes beyond the diffraction limit due to the hybrid states of surface plasmons and Bloch surface waves.Most of these modes'interactions remain within the weak coupling regime,yet strong coupling is also anticipated to occur.In this work,we present an intriguing case of amplified spontaneous emission(ASE),amplified by the splitting upper polariton mode within a strong coupling system,stemming from a square lattice of plasmonic cone lattices(PCLs).The PCLs are fabricated using an anodized aluminum oxide membrane(AAO),which facilitates strong coupling between surface plasmons and Bloch surface wave modes,with the maximum Rabi splitting observed at 0.258 eV for the sample with an aspect ratio of 0.33.A 13.5-fold increase in amplified spontaneous emission is recorded when the emission from Nile Red coincides with this flat energy branch of upper polariton,which exhibits a high photon density of states.Reduced group velocity can prolong photon lifetime and boost the probability of light-matter interaction.The observed ASE phenomenon in this strong coupling plasmonic system widens the scope for applications in nanolasing and polariton lasing.
基金Hubei University of Automotive Technology through the start-up research grant(BK202212),located in Shiyan 442002,China。
文摘We propose an effective surface plasmon resonance system designed to achieve both negative and positive Goos–H??nchen shifts in reflected light.This system comprises a metal film and an underlying medium,where the real part of the permittivity of the underlying medium must be less than unity.Surface plasmon polaritons can be excited at the lower surface of the metal when light is incident from the air onto the upper surface of the metal.The excitation of surface plasmon polaritons leads to the exploration of the Goos–H??nchen shift(G–HS).Control over the negative and positive(G–HS)is investigated via the wavelength of the incident light.The magnitude of the G–HS is strongly dependent on the incident wavelength.A remarkable enhancement of both negative and positive G–HS in the reflected light is achieved at certain wavelengths and incident angles.Our system paves the way for exploring different characteristics of optical switching and micro-sensors with very high precision.
基金supported by the National Key Research and Development Program of China(Grant Nos.2021YFA1400700 and 2022YFA1404300)the National Natural Science Foundation of China(Grant Nos.12022403 and 62375123)the Natural Science Foundation of Jiangsu Province(Grant No.BK20243009).
文摘Plasmonic colors are attracting attention for their subwavelength small size,vibrant hues,and environmental sustainability beyond traditional pigments while suffering from angular and/or polarization dependency due to distinct excitations of lattice resonances and/or surface plasmon polaritons(SPPs).Here,we demonstrate the sodium metasurface-based plasmonic color palettes with polarization-independent wide-view angle(approximately>〓〓60 deg in experiment and up to〓〓90 deg in theory)and single-particlelevel pixel size(down to∼60 nm)that integrate both pigment-like and structure coloring advantages,fabricated by the templated nanorod-pixelated solidification of wetted liquid metals.Such intriguing performances are mainly attributed to the particle plasmon dominant spectral response by steering the filling profile and thus the interplay between localized surface plasmons and SPPs.Combining low material cost,potentially scalable manufacturing process,and pronounced optical performance,the proposed sodium-based metasurfaces will provide a promising route for advanced color information technology.
基金supported by the University Grants Committee/Research Grants Council of the Hong Kong Special Administrative Region,China(AoE/P-502/20,C1015-21E,C5031-22G,CityU15303521,CityU11305223,CityU11310522,CityU11300123,and G-CityU 101/22)the City University of Hong Kong(9380131 and 7005867)the National Natural Science Foundation of China(62375232).
文摘Meta-devices have significantly revitalized the study of nonlinear optical phenomena.At the nanoscale,the detrimental effects of phase mismatching between fundamental and harmonic waves can be substantially reduced.This review analyzes the theoretical frameworks of how plasmonic and dielectric materials induce nonlinear optical properties.Plasmonic and dielectric nonlinear meta-devices that can excite strong resonant modes for efficiency enhancement are explored.We outline different strategies designed to shape the radiation pattern in order to increase the collection capability of nonlinear signals emitted from meta-devices.In addition,we discuss how nonlinear phase manipulation in meta-devices can integrate the benefits of efficiency enhancement and radiation shaping,not only boosting the energy density of the nonlinear signal but also facilitating a wide range of applications.Finally,potential research directions within this field are discussed.
基金supported by the National Natural Science Foundation of China(22162007)the Science and Technology Supporting Project of Guizhou Province([2021]480)+1 种基金the Science and Technology Supporting Project of Guizhou Province([2023)379)the Project from Guizhou Institute of Innovation and development of dual-carbon and new energy technologies(DCRE-2023-05)。
文摘Structural engineering enhances plasmonic stability and amplifies localized electric fields,yet the limited intrinsic activity of plasmonic materials necessitates integrating catalytic active sites.Herein,we design a yolk@shell nanoreactor featuring dual-plasmonic Au@CuS core-shell structures encapsulated by sulfur vacancy-rich ZnIn2S4(Sv-ZIS).The electromagnetic“hotspots”from Au and CuS near-field coupling concentrate incident light to boost hot-carrier generation and migration while sulfur vacancies in Sv-ZIS promote hydrogen evolution.This dual mechanism synergistically achieves 86.3 mmol g^(-1)h-1of H2production(65.6%quantum efficiency at 420 nm),maintaining 48.3 mmol g^(-1)h-1at 6℃.Density functional theory(DFT)simulations demonstrate that sulfur vacancies not only reduce the H*adsorption energy barrier from 0.87 to 0.11 eV but also amplify the interfacial electric field strength by 9%.Vacancy-redirected fields favor proton reduction pathways,accelerating charge transfer kinetics.Comparative studies confirm the universal superiority of dual-plasmonic architecture,while Sv-ZIS shells exhibit optimized activity through defect-mediated electronic interactions.This work provides a blueprint for bridging plasmonic field enhancement and defect engineering in multi-component photocatalysts.
基金supported by the National Natural Science Foundation of China(62335012,62371258,624B2075,62205160,62435010)Young Scientific and Technological Talents in Tianjin(QN20230227)Fundamental Research Funds for the Central Universities,Nankai University(63231159).
文摘Vortex beams carrying orbital angular momentum(OAM)are of great significance for high-capacity communication and super-resolution imaging.However,there is a huge gap between the free-space vortices(FVs)and plasmonic vortices(PVs)on chips,and active manipulation as well as multiplexing in more channels have become a pressing demand.In this work,we demonstrate a terahertz(THz)cascaded metadevice composed of a helical plasmonic metasurface,a liquid crystal(LC)layer,and a helical dielectric metasurface.By spin-orbital angular momentum coupling and photon state superposition,PVs and FVs are generated with mode purity of over 85%on average.Due to the inversion asymmetric design of the helical metasurfaces,the parity symmetry breaking of OAM is realized(the topological charge numbers no longer occur in positive and negative pairs,but all are positive),generating 6 independent channels associated with the decoupled spin states and the near-/far-field positions.Moreover,by the LC integration,dynamic mode switching and energy distribution can be realized,finally obtaining up to 12 modes with a modulation ratio of above 70%.This active tuning and multi-channel multiplexing metadevice establishes a bridge connection between the PVs and FVs,exhibiting promising applications in THz communication,intelligent perception,and information processing.
基金supported by the National Research Foundation of Korea(NRF)Grant funded by the Korean Government(Nos.2020R1A2C3003958 and 2021R1C1C2010169)the Basic Science Research Program(Priority Research Institute)through the NRF of Korea funded by the Ministry of Education(No.2021R1A6A1A10039823)the Korea Basic Science Institute(National Research Facilities and Equipment Center)grant funded by the Ministry of Education(No.2020R1A6C101B194).
文摘Hybrid organic-inorganic perovskite photodetectors have gained significant attention due to their superior potential for optoelectronic applications,offering various advantages such as low-cost processing,high charge carrier mobility,and lightweight properties.However,these perovskite photodetectors exhibit relatively low absorption in the near-infrared(NIR)range,which limits their potential applications.Here,to address this challenge,the integration of gold nanorods(Au NRs)utilizing localized surface plasmon resonance(LSPR)effects in the NIR range has been developed,leading to enhanced light absorption in the active region and higher photocurrent generation.Additionally,∼7.9 nm of thin polyethyleneimine ethoxylated(PEIE)interlayers were incorporated into the Au NR photodetectors,suppressing dark current by blocking charge injection.As a result,the synergistic effect of the Au NR/PEIE hybrid layer has led to a high-performance photodetector with a responsivity of 0.360 A/W and a detectivity of 1.81×10^(10) Jones,demonstrating a noticeable enhancement compared to the control device.Finite-difference time-domain(FDTD)simulations,morphological characterizations,and photoluminescence studies further support the mechanism for enhancing the performance of the device.We believe that our plasmon-enhanced protocol holds strong potential as a promising platform for perovskite optoelectronic devices.
基金supported by the National Natural Science Foundation of China(Grant No.22276088,22576093)the Shenzhen Science and Technology Program(KCXFZ20230731093601003,KQTD20240729102048052,20231116144111001)the High Level of Special Funds(G03034K006)。
文摘Bisphenol S(BPS)is an environmental endocrine disruptor that poses substantial risks to both ecosystems and human health.Its widespread occurrence necessitates the development of sensitive,rapid,cost-effective,and field-deployable analytical tools for environmental monitoring.Herein,we developed a plasmon-enhanced CdIn_(2)S_(4)/Bi_(2)WO_(6)Z-scheme heterojunction to construct a photoelectrochemical(PEC)aptasensor for BPS detection.The Z-scheme configuration between CdIn_(2)S_(4)and Bi_(2)WO_(6)significantly enhances the PEC response by suppressing recombination of photogenerated electronhole pairs.Further integration with gold nanoparticles(AuNPs)amplifies the photocurrent through the surface plasmon resonance(SPR)effect,yielding a highly efficient PEC sensing platform.A BPS-specific aptamer was immobilized on the electrode to enable selective target capture.The resulting aptamer-target complex,upon exposure to BPS,impedes interfacial electron transfer,resulting in a concentration-dependent decrease in the photocurrent.The PEC aptasensor exhibited a wide linear detection range of 5 nM to 50μM and a detection limit of 0.64 nM.The sensor demonstrated high selectivity against structurally similar interfering substances.Application to real water samples yielded results consistent with that of HPLC-MS/MS,confirming the sensor's reliability and practical applicability.This work establishes a sensitive,rapid,and robust PEC strategy for monitoring BPS in complex environmental matrices with potential for routine environmental analysis.
文摘Tamm plasmon polaritons(TPPs)are localized photonic states at the interface between a metal layer and one-dimensional(1D)photonic crystal substrate.Unlike surface plasmon polaritons(SPPs),TPPs can be excited by both transverse magnetic and electric waves without requiring additional coupling optics.TPPs offer robust color filtering,making them ideal for applications such as complementary metal oxide semiconductor(CMOS)image detectors.However,obtaining a large-area,reversible,and reconfigurable filter remains challenging.This study demonstrates a dynamically reconfigurable reflective color filter by integrating an ultrathin antimony trisulfide(Sb_(2)S_(3))layer with Tamm plasmonic photonic crystals.Reconfigurable tuning was achieved by inducing Sb_(2)S_(3) crystallization and reamorphization via thermal and optical activation,respectively.The material exhibited good stability after multiple switching cycles.The reflectance spectrum can be tuned across the visible range,with a shift of approximately 50 nm by switching Sb_(2)S_(3) between its amorphous and crystalline phases.This phase transition is nonvolatile and substantially minimizes the energy consumption,enhancing efficiency for practical applications.Tamm plasmonic photonic crystals are low-cost and large-scale production,offering a platform for compact color display systems and customizable photonic crystal filters for realistic system integration.
基金supported by the National Natural Science Foundation of China(Grant Nos.62422503,62105080,22004016,and U22A2093)the Guangdong Basic and Applied Basic Research Foundation Regional Joint Fund(Grant Nos.2023A1515011944,2020B1515130006,and 2021B515120056)+1 种基金the Talent Recruitment Project of Guangdong(Grant No.2021QN02X179)the Science and Technology Innovation Commission of Shenzhen(Grant Nos.JCYJ20220531095604009 and RCYX20221008092907027).
文摘Confronting the escalating global challenge of counterfeit products,developing advanced anticounterfeiting materials and structures with physical unclonable functions(PUFs)has become imperative.All-optical PUFs,distinguished by their high output complexity and expansive response space,offer a promising alternative to conventional electronic counterparts.For practical authentications,the expansion of optical PUF keys usually involves intricate spatial or spectral shaping of excitation light using bulky external apparatus,which largely hinders the applications of optical PUFs.Here,we report a plasmonic PUF system based on heterogeneous nanostructures.The template-assisted shadow deposition technique was employed to adjust the morphological diversity of densely packed metal nanoparticles in individual PUFs.Transmission images were processed via a hash algorithm,and the generated PUF keys with a scalable capacity from 2875 to 243401 exhibit excellent uniqueness,randomness,and reproducibility.Furthermore,the wavelength and the polarization state of the excitation light are harnessed as two distinct expanding strategies,offering the potential for multiscenario applications via a single PUF.Overall,our reported plasmonic PUFs operated with the multidimensional expanding strategy are envisaged to serve as easy-to-integrate,easy-to-use systems and promise efficacy across a broad spectrum of applications,from anticounterfeiting to data encryption and authentication.
基金supported by the National Natural Science Foundationof China (No.52276216)the International Partnership Program ofChinese Academy of Sciences (No.123GJHZ2022055MI)+1 种基金the AnhuiProvincial Natural Science Foundation (No.2108085UD03)the Fundamental Research Funds for the Central Universities
文摘The construction of a well-defined and efficient Z-scheme heterostructure with enhanced photogenerated charge carriers and their rapid transfer is vital for realizing efficient photocatalytic hydrogen production,to achieve carbon neutrality.Herein,we study the H_(2)evolution reaction by rationally constructing a hybrid Au-anchored UiO-66-NH_(2)with localized surface plasmon resonance(LSPR)properties,embedded with ZnIn_(2)S_(4)/MoS_(2)nanosheets.Interestingly,the synergistic effect of excellent heterojunction,tunes additional catalytic active sites,provides effective separation of photogenerated charges at the junction interface and establishes a dedicated microenvironment for the boosted electron transfer.Notably,the optimized hybrid photocatalyst(Au6@U6N)15/ZIS/MS5 exhibits highly efficient H_(2)generation of 58.2 mmol g^(-1)h^(-1),which is almost 16 and 1.5 folds of the pristine ZIS and MS/U6N/ZIS,correspondingly.It has an apparent quantum efficiency of 19.6%at a wavelength of 420 nm,surpassing several reported MOF-based ZnIn_(2)S_(4)photocatalytic H_(2)evolution activities.Significantly,this research provides insights into the design of interface-engineered plasmonic MOF with layered encapsulated heterostructures that elucidate the role of plasmonic LSPR effect and efficiently regulate the charge transfer with enhanced microchannels,hence boosting the visible-light-driven photocatalytic activity for realizing efficient green energy conversion.
基金financially supported by National R&D Program(RS-2024-00405016)Nano Material Technology Development Program(2022M3HA1A01011993)financially supported by Samsung Electronics Co.,Ltd.
文摘The increasing importance of high-purity isopropyl alcohol(IPA)in semiconductor processing technology has led to a higher demand for technologies capable of detecting impurities in IPA.Although accurate and various impurity detection technologies have been developed,most of them have limitations in real-time and repeatable detection of impurities.Herein,for the first time,surface plasmon resonance(SPR)sensor was developed utilizing graphene transferred Au film(Au/graphene)to detect sub-ppm levels of 2,4-dinitrophenol(2,4-DNP)dissolved in IPA and this sensor demonstrates the ability to detect 2,4-DNP in real-time with great reversibility.The adsorption of 2,4-DNP to graphene is found to be stronger than that for Au film because of noncovalent graphene p–p stacking interaction,and the effect of graphene is demonstrated through density function theory(DFT)calculations and enhancement in sensing performance of Au/graphene sensor.Additionally,the presence of noncovalent p–p stacking interaction between 2,4-DNP and graphene has been demonstrated by confirming the p-doping effect of graphene-based solution field-effect transistor measurements and consecutive Raman spectra analysis.This study offers experimental and theoretical insights into the adsorption kinetics of 2,4-DNP dissolved in IPA and provides promising perspectives for real-time sensing technology utilizing label-free graphene to detect impurities in high-purity cleaning agents.
基金Project supported by the National Natural Science Foundation of China (Grant No. 11804288)the Key Scientific Research Project of Higher Education Institutions in Henan Province, China (Grant No. 20231205164502999)。
文摘Negative friction refers to a frictional force that acts in the same direction as the motion of an object, which has been predicted in terahertz(THz) gain systems [Phys. Rev. B 108 045406(2023)]. In this work, we investigate the enhancement of the negative friction experienced by nanospheres placed near a graphene substrate. We find that the magnitude of negative friction is related to the resonant coupling between the surface plasmon polaritons(SPPs) of the graphene and localized surface phonon polaritons(LSPh P) of nanospheres. We exam nanospheres consisted of several different materials, including SiO_(2), Si C, Zn Se, Na Cl, ln Sb. Our results suggest that the LSPh P of Na Cl nanospheres match effectively with the amplified SPPs of graphene sheets. The negative friction for Na Cl nanospheres can be enhanced about one-to-two orders of magnitude compared to that of silica(SiO_(2)) nanospheres. At the resonant peak of negative friction, the required quasi-Fermi energy of graphene is lower for Na Cl nanospheres. Our finds hold great prospects for the mechanical manipulations of nanoscale particles.
