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Global Cross-Attention Transformer for Zero-Shot Metasurface Inverse Design 认领 引用
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作者 Li Zhu Yichen Wang +3 位作者 Guangming He Ouling Wu Hongsheng Chen Chao Qian 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第4期74-82,共9页
The integration of artificial intelligence with electromagnetic metasurfaces has inaugurated a new era of intelligent metasurfaces,enabling self-adaptive ability for various user demands and in complex environments.Ho... The integration of artificial intelligence with electromagnetic metasurfaces has inaugurated a new era of intelligent metasurfaces,enabling self-adaptive ability for various user demands and in complex environments.However,inverse design,as the core of intelligent metasurfaces,is typically trained based on an assumption of ideal input,thus failing to maintain robustness against complex real-world signal distortions. 展开更多
关键词 intelligent metasurfacesenabling metasurface inverse design intelligent metasurfacesis zero shot artificial intelligence electromagnetic metasurfaces global cross attention transformer
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Fundamental and emerging applications of metasurfaces in laser optics:an overview 认领 引用
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作者 Tao He Xiaofeng Rao +7 位作者 Chao Feng Chengfeng Li Jingyao Zhang Junming Fan Zeyong Wei Yuzhi Shi Zhanshan Wang Xinbin Cheng 《Photonics Insights》 2026年第2期52-93,共42页
.Over the past 15 years,metasurfaces have emerged as a prominent research focus in nanophotonics.They offer remarkable capabilities for controlling light by tailoring its fundamental properties,such as phase,amplitude... .Over the past 15 years,metasurfaces have emerged as a prominent research focus in nanophotonics.They offer remarkable capabilities for controlling light by tailoring its fundamental properties,such as phase,amplitude,and polarization,at subwavelength scales in both pixel size and thickness.At the same time,due to the excellent monochromaticity,coherence,and high-power performance,lasers have become an indispensable part of various disciplines.A significant amount of research has explored the application of metasurfaces in various laser systems.However,the nanophotonics community currently lacks a comprehensive review that both summarizes these achievements and outlines future research directions.This review provides an overview of the latest advancements in metasurfaces for laser systems,including their underlying physical mechanisms and applications in both passive and active laser systems.Here,“active systems”refers to the metasurfaces integrated within the gain medium.Finally,we conclude with a perspective on prospective developments in metasurfaces for laser systems. 展开更多
关键词 metasurface passive metasurface active metasurface high-performance meta-device nanophotonics
Integrated metasurface-freeform system enabled multi-focal planes augmented reality display 认领 引用 被引量：3
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作者 Shifei Zhang Lina Gao +9 位作者 Yidan Zhao Yongdong Wang Bo Wang Junjie Li Jiaxi Duan Dewen Cheng Cheng-Wei Qiu Yongtian Wang Tong Yang Lingling Huang 《Opto-Electronic Science》 CAS 2026年第1期1-12,共12页
The advent of artificial intelligence(AI)has propelled augmented reality(AR)display technology to a pivotal juncture,positioning it as a contender for the next generation of mobile intelligent terminals.However,the pu... The advent of artificial intelligence(AI)has propelled augmented reality(AR)display technology to a pivotal juncture,positioning it as a contender for the next generation of mobile intelligent terminals.However,the pursuit of advanced AR displays,particularly those capable of delivering immersive 3D experiences,is significantly hindered by the performance limitations of current hardware and the complexity of system integration.In this study,we present an innovative multi-focal plane AR display system that integrates a non-orthogonal polarization-multiplexing metasurface,freeform optical elements,and an OLED display screen.All optical elements are integrated into a single solid-state architecture,based on a joint optimization design approach of ray tracing and diffraction theory.The multi-focal plane AR visual effect is realized by the compact and multiplexing metasurface,which performs distinct phase functions across diverse polarization channels.Meanwhile,freeform surfaces offer ample design flexibility for the collaborative optimization of multi-focal plane imaging and the see-through systems.Followed by a mechanical design and prototype assembly,we demonstrate the system's capabilities in real-time and multi-focal plane display.The digital images at all virtual image distances seamlessly integrate with the real environment,fully exhibiting the system's high parallelism and real-time interactivity.With the innovative design concept and joint design method,we believe that our work will spur more innovative and compact intelligent solutions for AR displays and inject new vitality into hybrid optical systems. 展开更多
关键词 augmented reality metasurface-freeform multi-focal planes display non-orthogonal polarizationmultiplexing metasurfaces
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Ambient-energy-driven space-time-coding metasurface for spacefrequency-division multiplexing wireless communications 认领 引用
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作者 Han Wei Tian Chao Song +3 位作者 Dong Jie Wang Qian Zhu Tie Jun Cui Wei Xiang Jiang 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2026年第2期12-26,共15页
Programmable metasurfaces have shown exceptional potentials in wireless communications due to their capability to manipulate electromagnetic(EM)waves dynamically and flexibly.However,the large-scale application and fl... Programmable metasurfaces have shown exceptional potentials in wireless communications due to their capability to manipulate electromagnetic(EM)waves dynamically and flexibly.However,the large-scale application and flexible deployment of programmable metasurfaces still face challenges of high communication capacity requirements and stringent energy constraints.Here,we report an ambient-energy-driven space-time-coding metasurface to address these issues.On one hand,the metasurface can achieve efficient space-frequency-division multiplexing manipulations by dynamically controlling multiple frequencies and the spatial propagation directions of reflection EM waves.On the other hand,the shared-aperture ambient solar energy harvesting capability and low power consumption characteristic of the metasurface enable it to be self-powered without relying on any external power supply.To demonstrate these remarkable features,a four-channel wireless communication system prototype is built using the programmable metasurface.Experimental results confirm that four distinct images can be transmitted to four user terminals simultaneously,independently,and in real time with remarkably low energy consumption per bit.Such innovative metasurface provides a simple and effective approach for integrating ambient energy harvesting,multidimensional microwave manipulation,and direct information modulation on a single physical platform,which will advance the wireless communications in cost-effectiveness,enhanced capacity,energy efficiency,and environmental friendliness. 展开更多
关键词 programmable metasurfaces space-time-coding metasurfaces ambient energy harvesting self-powered multiplexing wireless communications energy-efficient
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A double-layer reflective metasurface with increased polarization independent channels through rotating array 认领 引用
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作者 Bo YIN Xiaoliang LI Shubin WANG 《Optoelectronics Letters》 EI 2026年第6期337-343,共7页
The implementation of multifunctional metasurfaces through loading diodes has extremely high costs,while increasing the number of channels in the element through polarization multiplexing technology is limited.This pa... The implementation of multifunctional metasurfaces through loading diodes has extremely high costs,while increasing the number of channels in the element through polarization multiplexing technology is limited.This paper proposes a dual-band five-channel(DBFC)1-bit surface,which expands the polarization independent(PD)channels through rotating array.The polarization-independent metasurface element consists of three layers of metal,with the top layer comprising three rectangular patches oriented in the x-direction,the middle layer featuring a Jerusalem cross structure with accompanying resonators,and the bottom layer being a metal ground plane.The middle layer element can easily independently provide the required 1-bit reflection phases for two orthogonal polarizations in every frequency.The rectangular patches in the x-direction on the top layer do not contribute to the phase of y-polarization.By rotating the upper layer dielectric array 90°,the rectangular patches change to the y-direction.Under y-polarized illumination,the current distribution in the middle layer is shielded,providing a fifth set of polarization independent phases.The proposed 1-bit DBFC metasurface array has advantages in terms of structure and cost,while enhancing the utilization rate of the metasurface array.It has high application potential in microwave imaging,wireless power transmission,and other projects. 展开更多
关键词 Polarization independent channels Rotating array multifunctional metasurfaces loading diodes three rectangular patches Double layer reflective metasurface rotating arraythe polarization multiplexing technology
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Wide-angle retroreflector engineered with an angle-insensitive,broadband reconfigurable metasurface 认领 引用
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作者 XIN WEI MIN HUANG +6 位作者 YIJUN ZOU ZHENG ZHEN KAI WANG HAOMIN WANG WEI ZHOU HAORAN HAN BIN ZHENG 《Photonics Research》 SCIE EI CAS CSCD 2026年第5期2334-2345,共12页
Current metasurface retroreflectors are often constrained by narrow bandwidths,limited angular performance,and confinement to one-dimensional operation,which hinders their integration into compact electromagnetic syst... Current metasurface retroreflectors are often constrained by narrow bandwidths,limited angular performance,and confinement to one-dimensional operation,which hinders their integration into compact electromagnetic systems.Here,we propose a reconfigurable metasurface that overcomes these limitations to achieve broadband,wide-angle,and two-dimensional(2D)retroreflection for both TE and TM polarizations.The design strategy integrates varactor-loaded meta-atoms for continuous dynamic phase tuning with a metallic via-fenced topology.This configuration creates decoupled resonant cavities that effectively suppress spatial dispersion and mutual coupling,ensuring robust angular stability even under highly oblique incidence. 展开更多
关键词 two dimensional retroreflection wide angle metasurface retroreflectors broadband compact electromagnetic systemsherewe metallic v phase tuning reconfigurable metasurface
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Conformal diffusion acoustic metasurfaces with soft materials for scattering reduction 认领 引用
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作者 Kunhong Li Wenkang Cao +3 位作者 Qiao Huang Jinsong Ye Kaiping Nie Jie Hu 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第6期773-780,共8页
Planar diffusion acoustic metasurfaces(PDAMs)with rigid materials have attracted much attention due to their ability to redistribute acoustic energy in various directions and to realize acoustic stealth.In this paper,... Planar diffusion acoustic metasurfaces(PDAMs)with rigid materials have attracted much attention due to their ability to redistribute acoustic energy in various directions and to realize acoustic stealth.In this paper,to enhance the adaptability of PDAMs to complex curved surfaces,a conformal diffusion acoustic metasurface(CDAM)with soft materials is proposed to manipulate scattering features,leading to considerable scattering reduction in the specular direction.To realize the proposed CDAM,eight kinds of meta-atoms with phase differences of 45°are introduced.Polydimethylsiloxane(PDMS)is chosen as the material of meta-atoms,which not only has a low modulus but also possesses the ability to deform compliantly with environmental conditions.The simulated results demonstrate that the proposed CDAM can achieve backward scattering reduction of at least 9 dB with bending angles of the CDAM from 0°to 90°,and has potential applications in noise control,acoustic stealth,architectural acoustics,and other relevant applications. 展开更多
关键词 conformal diffusion acoustic metasurface scattering reduction soft materials coding metasurface
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Brillouin zone folding-driven multi-QBIC metasurfaces for enhanced trace analyte identification 认领 引用
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作者 WENSHUO CHEN YUE WANG +7 位作者 GUANGCHENG SUN GENGYU BAI RUI WU ZIJIAN CUI XIAOGUANG ZHAO SUGUO CHEN QIN ZHANG SUNCHAO HUANG 《Photonics Research》 SCIE EI CAS CSCD 2026年第5期2252-2262,共11页
The high Q factors and local field enhancement effect of bound states in the continuum(BIC)resonances offer significant potential for detecting trace substances.However,conventional BIC-based metasurface sensors suffe... The high Q factors and local field enhancement effect of bound states in the continuum(BIC)resonances offer significant potential for detecting trace substances.However,conventional BIC-based metasurface sensors suffer from material loss-induced low Q factors,limited field enhancement,and the constraint of a single resonance mode on the metasurface.Here,a Brillouin-zone-folding-driven metasurface supporting multiple quasi-BIC(QBIC)resonances is introduced to improve the detection performance of trace analytes. 展开更多
关键词 detecting trace substanceshoweverconventional metasurface sensors Brillouin zone folding trace analyte identification high Q factors trace analytes multi QBIC metasurfaces local field enhancement
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A Dual-Broadband Liquid-Crystal Programmable Metasurface and Its Application in Terahertz Wireless Communications 认领 引用
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作者 Yuan Fu Yuanbo Li +8 位作者 Xiaojian Fu Lu Xu Yujie Liu Qun Yan Zhou Jun Yang Chong Han Jun Yan Dai Qiang Cheng Tie Jun Cui 《Engineering》 SCIE EI CSCD 2026年第4期352-363,共12页
Terahertz communication technology is envisioned as a promising candidate for the pivotal spectrum technology in future wireless communication networks.However,the limited penetration ability of terahertz waves makes ... Terahertz communication technology is envisioned as a promising candidate for the pivotal spectrum technology in future wireless communication networks.However,the limited penetration ability of terahertz waves makes line-of-sight(LoS)transmission indispensable,hindering the extensive application of terahertz communications.In this work,a novel liquid-crystal programmable metasurface(LCPM)is proposed for the first time,which can effectively achieve dual-broadband beam manipulation to improve link stability and extend coverage for terahertz communications in non-line-of-sight(NLoS)scenarios.The LCPM is operated in both the W band that covers 94 GHz and the D band that covers 140 GHz,corresponding to x-polarized and y-polarized wave incidence,respectively.Based on the proposed LCPM,realistic NLoS terahertz communication links are established and showcased.Communication measurements substantiate that the LCPM is capable of realizing extensive dynamic channel regulations and long-distance communications across both bands in various modulation schemes,supporting real-time high-speed video transmission.The experimental results validate the feasibility of employing the LCPM for terahertz wireless communications,paving the way for developing and implementing ubiquitous terahertz communication networks even with LoS blockage. 展开更多
关键词 Programmable metasurface Terahertz communication Reconfigurable intelligent surface Dual-frequency Broadband Beamforming
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Tunable terahertz chiral response in all-dielectric BIC metasurfaces 认领 引用
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作者 YANG Yue YAO Bu-yi +9 位作者 DAI Hai-tao HAO Xi-chen WANG Yu-han WANG Ruo-tong GUO Ting-yang DU Wen GAO Ming TAN Qi LI Ji-ning YAO Jian-quan 《中国光学（中英文）》 EI CAS CSCD 北大核心 2026年第4期1026-1034,共9页
Chiral metasurfaces play critical role in physics,materials science,pharmacognosy,and communications.To achieve high-performance chiral responses,such as high circular dichroism(CD)and highquality factors(Q-factors),b... Chiral metasurfaces play critical role in physics,materials science,pharmacognosy,and communications.To achieve high-performance chiral responses,such as high circular dichroism(CD)and highquality factors(Q-factors),bound-state-in continuum(BIC),BIC-based metasurfaces have been extensively studied as a promising platform.However,most realized BIC metasurfaces rely on metallic constituents whose high electromagnetic losses and absence of dynamic chirality tuning together impose a severe limit on their practical potential.This paper presents an all-dielectric chiral BIC metasurface.By illumination symmetry breaking,the metasurface exhibits a CD value of 0.93.Additionally,dynamic tuning of CD is enabled by external optical pumping.This scheme provides a new avenue for dynamically manipulating the chiral metasurface,which can be used to achieve more complex dynamic chiral characterization and applications. 展开更多
关键词 all-dielectric metasurface circular dichroism dynamic control terahertz
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High-precision detection of topological charge of integral and fractional vortices based on metasurface 认领 引用
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作者 GAO Xin-peng DING Shuang-shuang +4 位作者 MA Jing-wen ZHOU Xiao-xiao SHANG Yu-li FAN Shi-song TENG Shu-yun 《中国光学（中英文）》 EI CAS CSCD 北大核心 2026年第3期754-761,共8页
High-precision detection of topological charge is significant for the practical applications of vor-tex beams.In view of the existing evaluation with low resolution of topological charge and more complexity to judge s... High-precision detection of topological charge is significant for the practical applications of vor-tex beams.In view of the existing evaluation with low resolution of topological charge and more complexity to judge simultaneously integer and fraction,this paper theoretically proposes and numerically verifies the double judgment method for topological charge based on the designed metasurface.The inner and outer dif-fraction patterns of metasurface can judge the value and sign of topological charge.The detection precision of the proposed method reaches 0.05.The theoretic and simulated results give the solid verification for the ef-fectiveness of the proposed method.This method has outstanding advantages including planar structure design without additional elements,direct judgment without data processing and high precision over the ex-isting methods,which is beneficial to the detection of topological charge and the applications of optical vor-tices. 展开更多
关键词 optical vortex topological charge metasurface
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Pixelated liquid crystal programmable metasurface enabled multi-functional terahertz near-field wavefront manipulation 认领 引用
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作者 YUAN FU XIAOJIAN FU +4 位作者 LIFENG CHEN PENG WANG LIHAO HUANG JUN YANG TIE JUN CUI 《Photonics Research》 SCIE EI CAS CSCD 2026年第5期2068-2079,共12页
Reconfigurable intelligent surface(RIS)technology is believed to effectively solve the dilemma of terahertz wireless communication in non-line-of-sight scenarios.Notably,the deployment of large-scale RIS arrays at hig... Reconfigurable intelligent surface(RIS)technology is believed to effectively solve the dilemma of terahertz wireless communication in non-line-of-sight scenarios.Notably,the deployment of large-scale RIS arrays at high frequencies brings about significant near-field effects,resulting in extensive near-field areas,which provides the possibility for the application of near-field communication.In this paper,a pixelated liquid crystal program-mable metasurface(PLCPM)is proposed to effectively manipulate terahertz waves in the near-field region.Leveraging the tunability of liquid crystal(LC)materials,the proposed PLCPM achieves 1-bit phase coding capability within the 104-110 GHz frequency band. 展开更多
关键词 multi functional terahertz near field wavefront manipulation manipulate terahertz terahertz wireless communication reconfigurable intelligent surface pixelated liquid crystal programmable metasurface non line sight scenarios near field communication reconfigurable intelligent surface ris technology
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Mid-infrared chemical imaging of living cells enabled by plasmonic metasurfaces 认领 引用
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作者 Steven H.Huang Po-Ting Shen +4 位作者 Aditya Mahalanabish Giovanni Sartorello Jenny Li Xuefeng Liu Gennady Shvets 《Advanced Photonics Nexus》 CSCD 2026年第3期148-159,共12页
Mid-infrared(MIR)chemical imaging provides rich chemical information of biological samples in a label-free and nondestructive manner.Yet,its adoption for live-cell analysis is limited by the strong attenuation of MIR ... Mid-infrared(MIR)chemical imaging provides rich chemical information of biological samples in a label-free and nondestructive manner.Yet,its adoption for live-cell analysis is limited by the strong attenuation of MIR light in water,often necessitating cell culture geometries that are incompatible with the prolonged viability of cells.Here,we introduce a new approach to MIR microscopy,where cells are imaged through their localized near-field interaction with a plasmonic metasurface.Chemical contrast of distinct molecular groups provided sub-cellular resolution images of the proteins,lipids,and nucleic acids in the cells that were collected using an inverted MIR microscope.Time-lapse imaging of living cells demonstrated that their behaviors,including motility,viability,and substrate adhesion,can be monitored over extended periods of time using low-power MIR light.The presented approach provides a method for the nonperturbative MIR imaging of living cells,which is well-suited for integration with modern high-throughput screening technologies for the label-free,high-content chemical imaging of living cells. 展开更多
关键词 infrared microscopy vibrational microscopy metasurfaces plasmonics surface-enhanced infrared absorption
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High-efficiency infrared upconversion imaging with nonlinear silicon metasurfaces empowered by quasi-bound states in the continuum 认领 引用
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作者 Tingting Liu Jumin Qiu +6 位作者 Meibao Qin Xu Tu Huifu Qiu Feng Wu Tianbao Yu Qiegen Liu Shuyuan Xiao 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2026年第4期75-85,共11页
Infrared imaging is indispensable for its ability to penetrate obscurants and visualize thermal signatures,yet its practical use is hindered by the intrinsic limitations of conventional detectors.Nonlinear upconversio... Infrared imaging is indispensable for its ability to penetrate obscurants and visualize thermal signatures,yet its practical use is hindered by the intrinsic limitations of conventional detectors.Nonlinear upconversion,which converts infrared light into the visible band,offers a promising pathway to address these challenges.Here,we demonstrate high-efficiency infrared upconversion imaging using nonlinear silicon metasurfaces.By strategically breaking in-plane symmetry,the metasurface supports a high-Q quasi-bound states in the continuum resonance,leading to strongly enhanced third-harmonic generation(THG)with a conversion efficiency of 3×10-5 at a pump intensity of 10 GW/cm2.Through this THG process,the metasurface enables high-fidelity upconversion of arbitrary infrared images into the visible range,achieving a spatial resolution of~6μm as verified using a resolution target and various customized patterns.This work establishes a robust platform for efficient nonlinear conversion and imaging,highlighting the potential of CMOS-compatible silicon metasurfaces for high-performance infrared sensing applications with reduced system complexity. 展开更多
关键词 infrared upconversion imaging nonlinear metasurfaces bound states in the continuum third-harmonic generation
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Pixelated BIC metasurfaces for terahertz integrated sensing and imaging 认领 引用
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作者 Zhanqiang Xue Guizhen Xu +4 位作者 Junliang Chen Junxing Fan Hongyang Xing Ye Zhou Longqing Cong 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2026年第3期81-92,共12页
Conventional terahertz(THz)single-pixel imaging relies on a sequential process involving compressed sensing,which requires a spatial modulator and is often time-intensive.Here,we propose a new THz single-pixel imaging... Conventional terahertz(THz)single-pixel imaging relies on a sequential process involving compressed sensing,which requires a spatial modulator and is often time-intensive.Here,we propose a new THz single-pixel imaging scheme operating in a parallelized fashion with a pixelated metasurface,demonstrated within a standard THz timedomain spectroscopy system.This approach encodes spatial information through multiple narrow linewidth resonances based on bound states in the continuum(BIC)physics,and the BIC-enabled pixelated metasurface facilitates the near-field distributed sensing through local field enhancement.We validate this integrated imaging and sensing capability using a 2×2 metasurface array in a proof-of-concept experiment,with scalability to larger arrays.The approach achieves 100%accuracy in binary imaging reconstruction from a single THz pulse and enables refractive index sensing with a sensitivity higher than 14.39 GHz/RIU.Leveraging the intrinsic penetration capability of THz radiation,this technique offers significant promise for next-generation noninvasive applications such as security inspection and defect detection in semiconductor chips and pharmaceutical products. 展开更多
关键词 bound states in the continuum pixelated metasurfaces terahertz photonics integrated imaging and sensing
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Electric-Field-Driven Generative Nanoimprinting for Tilted Metasurface Nanostructures 认领 引用 被引量：1
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作者 Yu Fan Chunhui Wang +6 位作者 Hongmiao Tian Xiaoming Chen Ben QLi Zhaomin Wang Xiangming Li Xiaoliang Chen Jinyou Shao 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第1期290-305,共16页
Tilted metasurface nanostructures,with excellent physical properties and enormous application potential,pose an urgent need for manufacturing methods.Here,electric-field-driven generative-nanoimprinting technique is p... Tilted metasurface nanostructures,with excellent physical properties and enormous application potential,pose an urgent need for manufacturing methods.Here,electric-field-driven generative-nanoimprinting technique is proposed.The electric field applied between the template and the substrate drives the contact,tilting,filling,and holding processes.By accurately controlling the introduced included angle between the flexible template and the substrate,tilted nanostructures with a controllable angle are imprinted onto the substrate,although they are vertical on the template.By flexibly adjusting the electric field intensity and the included angle,large-area uniform-tilted,gradient-tilted,and high-angle-tilted nanostructures are fabricated.In contrast to traditional replication,the morphology of the nanoimprinting structure is extended to customized control.This work provides a cost-effective,efficient,and versatile technology for the fabrication of various large-area tilted metasurface structures.As an illustration,a tilted nanograting with a high coupling efficiency is fabricated and integrated into augmented reality displays,demonstrating superior imaging quality. 展开更多
关键词 Generative nanoimprinting Electric field assistance Tilted metasurface structures Large-area fabrication
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Open thermal cloak based on active thermal metasurfaces 认领 引用
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作者 Bao-Quan Hou Fei Sun +5 位作者 Yi-Chao Liu Jia-Peng Wang Ya-Ru Feng Bin-Zhao Cao Hong-Ming Fei Jie Wu 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期504-510,共7页
The enclosed configuration of conventional thermal cloaks prevents the passage of matter across their boundaries.To overcome this limitation,we propose an open thermal cloak(OTC)that simultaneously provides effective ... The enclosed configuration of conventional thermal cloaks prevents the passage of matter across their boundaries.To overcome this limitation,we propose an open thermal cloak(OTC)that simultaneously provides effective thermal cloaking and incorporates a functional exit that allows unimpeded passage and exchange of matter.The OTC integrates a closed thermal cloak with an exit(CTCE)and a thermal shifter designed via coordinate transformation.The thermal shifter compensates for performance degradation caused by the exit by transferring the thermal regulation function of the removed segment back to the exit location,using a material with equivalent negative thermal conductivity derived from transformation thermotics.For practical implementation,this idealized material is replaced with discrete active thermal metasurfaces(ATMs)at the boundary to replicate the required heat flux conditions.Numerical simulations show that the ATM-based OTC exhibits excellent cloaking performance under varying heat flow directions and across exits of different sizes and shapes,maintaining background temperature field integrity and a near-uniform temperature distribution inside the protected region.The average temperature disturbance induced is significantly lower than that of CTCE and a directly exposed object,with performance approaching that of an ideal closed thermal cloak(CTC).This work breaks the enclosure limitation of traditional thermal cloaks and shows promise for infrared thermal protection of underground shelters and the thermal management of heat-sensitive electronics. 展开更多
关键词 thermal cloaking thermal metasurface transformation thermotics open cloak active metasurface
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Metasurface Enhanced Photothermal Cement Foam for Robust and High-Throughput Seawater Desalination 认领 引用
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作者 Jianjun Guo Zhenxing Du +2 位作者 Wenqiang Zuo Zhangyu Wu Wei She 《Carbon Energy》 SCIE EI CAS CSCD 2026年第5期65-75,共11页
Solar-driven interfacial vapor generation provides a sustainable solution to global water scarcity,but balancing high evaporationrates,durable solar-thermal conversion,and salt resistance remains a significant challen... Solar-driven interfacial vapor generation provides a sustainable solution to global water scarcity,but balancing high evaporationrates,durable solar-thermal conversion,and salt resistance remains a significant challenge.Here,we present a novel cementbasedsolar evaporator(CSE)featuring a multi-scale hierarchical pore structure,fabricated via cost-effective vacuum casting.The CSE's metasurface comprises about 7000 aligned micro-honeycomb pores(150μm diameter)per square centimeter,expanding the evaporation area by 623%and enabling 96.9%broadband light absorption.Nano-scale gel pores from cementhydration weaken water hydrogen bonds,reducing vaporization enthalpy by 80%.This synergy achieves an evaporation rate of5.47 kgm-2h-1under one-sun illumination(93.3%efficiency)and 1.90 kgm-2h-1under dark conditions.Moreover,theunique open-closed dual-pore architecture,wherein open pores enable rapid salt ion diffusion and closed pores suppress heatloss,ensures continuous seawater desalination for over 30 days without performance degradation or salt accumulation.Acradle-to-grave life cycle assessment(LCA)reveals a 99%reduction in environmental impact.By transforming cement,theworld's most abundant construction material,into a metasurface-engineered evaporator,this work offers a durable and scalablesolution for solar desalination. 展开更多
关键词 foam cement long-term evaporation metasurface seawater desalination
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Tunable multi-frequency exceptional points in non-Hermitian terahertz metasurfaces 认领 引用
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作者 Xiang Hou Fangze Deng +10 位作者 Zhihua Han Yumeng Ma Chenglong Wang Yuchao Li Keke Cheng Ke Ma Yansheng Shao Ruidan Zhou Yuping Zhang Meng Liu Huiyun Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期623-634,共12页
Exceptional points(EPs)in non-Hermitian metasurfaces have garnered considerable attention due to their unique advantages in cutting-edge applications such as ultra-sensitive sensing and unidirectional reflectionlessne... Exceptional points(EPs)in non-Hermitian metasurfaces have garnered considerable attention due to their unique advantages in cutting-edge applications such as ultra-sensitive sensing and unidirectional reflectionlessness.However,existing studies on metasurfaces employing both active and passive tuning mechanisms can only observe a single EP,which fails to meet the requirements for multi-frequency responses or multifunctional integration,thus limiting the enhancement of device performance.In this study,we design a terahertz(THz)non-Hermitian metasurface device that is actively tuned by the phase-change material VO2.By keeping the geometric dimensions of the device unchanged,we achieve the simultaneous induction and detection of multi-frequency EPs at multiple frequency points.Through the regulation of VO2conductivity,the gain-loss distribution of the system can be continuously controlled,leading to the degeneracy of eigenvalues and eigenstates across multiple discrete frequency bands,thereby forming multi-frequency EPs.Furthermore,the design of chiral structures demonstrates that,under identical conductivity conditions,the eigenstates of the original metasurface structure and its chiral counterpart can degenerate into circularly polarized states with opposite rotations,enabling the switching of polarization chirality.These results illustrate that the deep integration of phase-change materials,non-Hermitian photonics,and electromagnetic manipulation in metasurfaces provides a novel design paradigm for the dynamic regulation of multi-frequency EPs and circular polarization control,laying a foundation for the development of high-performance and multifunctional integrated photonic platforms in the THz regime. 展开更多
关键词 exceptional points terahertz non-Hermitian metasurfaces
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Dual-functional metasurface image-processor 认领 引用
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作者 DING Shuang-shuang GAO Xin-peng +4 位作者 MA Jing-wen ZHOU Xiao-xiao SHANG Yu-li FAN Shi-song TENG Shu-yun 《中国光学（中英文）》 EI CAS CSCD 北大核心 2026年第3期683-688,共6页
Optical image processing has the advantages of fast and parallel operation. One single-layered metasurface is designed to implement the optical imaging and edge detection of image. The dual-functional image processing... Optical image processing has the advantages of fast and parallel operation. One single-layered metasurface is designed to implement the optical imaging and edge detection of image. The dual-functional image processing is conducted without the aid of 4f system and it is switched only by the handedness of in-cident circularly polarized light. The designed metasurface consists of silicon nanopillars and the optimized nanopillars are equivalent to half-wave plates with the transmittance of 87%. The simulation and experiment-al results verify the performance of metasurface. The integrated optical metasurface enables the extremely simple image processing system and it paves the way for the applications of metasurfaces in parallel image processing and optical integrating. 展开更多
关键词 metasurface optical imaging edge detection of image optical image processing
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