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Optoelectronics Letters 2025年第3期21卷 149-154页

作者： LI Wenqiang WU Min LI Weijun HAO Meilan YU Lina Ann Lab Institute of Semiconductors Chinese Academy of Sciences School of Electronic Electrical and Communication Engineering & School of Integrated Circuits University of Chinese Academy of Sciences Beijing key laboratory of Semiconductor Neural Network intelligent sensing and Computing Technology

In recent years, machine learning (ML) techniques have been shown to be effective in accelerating the development process of optoelectronic devices. However, as"black box"models, they have limited theoretical interpretability. In this work, we leverage symbolic regression (SR) technique for discovering the explicit symbolic relationship between the structure of the optoelectronic Fabry-Perot (FP) laser and its optical field distribution, which greatly improves model transparency compared to ML. We demonstrated that the expressions explored through SR exhibit lower errors on the test set compared to ML models, which suggests that the expressions have better fitting and generalization capabilities.

关键词： A

Recent progress on stability and applications of flexible perovskite photodetectors

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Journal of Semiconductors 2025年第1期46卷 5-19页

作者： Ying Hu Qianpeng Zhang Junchao Han Xinxin Lian Hualiang Lv Yu Pei Siqing Shen Yongli Liang Hao Hu Meng Chen Xiaoliang Mo Junhao Chu State key laboratory of Photovoltaic Science and Technology Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and PerceptionDepartment of Materials ScienceInstitute of OptoelectronicsFudan UniversityShanghai 200433China Advanced Silicon Technology Co. Ltd.Shanghai 201616China

Flexible photodetectors have garnered significant attention by virtue of their potential applications in environmental monitoring,wearable healthcare,imaging sensing,and portable optical *** stand out as particularly promising materials for photodetectors,offering exceptional optoelectronic properties,tunable band gaps,low-temperature solution processing,and notable mechanical *** this review,we explore the latest progress in flexible perovskite photodetectors,emphasizing the strategies developed for photoactive materials and device structures to enhance optoelectronic performance and ***,we discuss typical applications of these devices and offer insights into future directions and potential applications.

关键词： perovskite flexible photodetector stability versatile applications

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Lithium-plasmon-based low-powered dynamic color display

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National Science Review 2023年第1期10卷 205-213页

作者： Jie Liang Yan Jin Huiling Yu Xinjie Chen Lin Zhou Pengcheng Huo Ye Zhang Haiyang Ma Yi Jiang Bin Zhu Ting Xu Hui Liu Shining Zhu Jia Zhu National laboratory of Solid State Microstructures College of Engineering and Applied SciencesSchool of Physics Key Laboratory of Intelligent Optical Sensing and ManipulationMinistry of EducationJiangsu Key Laboratory of Artificial Functional MaterialsNanjing University

Display and power supply have been two essential and independent cornerstones of modern ***,we report a lithium-plasmon-based low-powered dynamic color display with intrinsic dual functionality（plasmonic display and energy recycling unit） which is a result of the electric-field-driven transformation of nanostructured lithium *** color displays are enabled by plasmonic transformation through electrodeposition（electrostripping） of lithium metals during the charging（discharging） process,while the consumed energy for coloring can be retrieved in the inverse process *** recycling of lithium metals brings energy consumption down to 0.390 mW cm-2(0.105 mW cm-2) for the active（static） coloration state of a pro of-of-concept display/battery device,which approaches nearly-zero-energy-consumption in the near-100%-energy-efficiency limit of commercial lithium *** the subwavelength feature of plasmonics with effective energy recycling,the lithium-plasmon-based dynamic display offers a promising route towards next-generation integrated photonic devices,with the intriguing advantages of low energy consumption,a small footprint and high resolution.

关键词： lithium plasmon dynamic display lithium metal battery low energy consumption lithium nanoparticle

Pancharatnam-Berry phase reversal via opposite-chirality-coexisted superstructures

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Light(Science & Applications) 2022年第6期11卷 1186-1193页

作者： Lin Zhu Chun-Ting Xu Peng Chen Yi-Heng Zhang Si-Jia Liu Quan-ming Chen Shi-Jun Ge Wei Hu Yan-Qing Lu National laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing University210093 NanjingChina

Recently discovered reflective Pancharatnam-Berry phase(PB phase)from chiral anisotropic media(e.g.,cholesteric liquid crystal,CLC)has aroused great interest in the emerging frontier of planar ***,the single chirality of common CLCs results in the intrinsic limitation of the same spin-selective PB phase manipulation,which means the reversal of the input spin cannot realize the conjugated PB *** this work,an innovative scheme based on opposite-chirality-coexisted superstructures is proposed to simultaneously modulate orthogonal circular polarization and get PB phase *** refilling CLC into a washed-out polymer network with opposite chirality and delicate photo-patterned structures,reflective optical vortex(OV)with opposite topological charges and vector beams with conjugated spiral PB phases are efficiently generated depending on the incident ***,OV holograms are encoded to reconstruct polarization-selective OV arrays,indicating the strong capability of such opposite-chirality-coexisted anisotropic *** work provides a new compact platform for planar optics,and sheds light on the architectures and functionalities of chiral superstructures.

关键词： opposite Berry optics

High-dimensional Poincarébeams generated through cascaded metasurfaces for high-security optical encryption

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PhotoniX 2024年第1期5卷 499-511页

作者： Jitao Ji Chen Chen Jiacheng Sun Xin Ye Zhizhang Wang Jian Li Junyi Wang Wange Song Chunyu Huang Kai Qiu Shining Zhu Tao Li National laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationJiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

optical encryption plays an increasingly important role in the field of information security owing to its parallel processing capability and low power *** the ultrathin metasurfaces in optical encryption has promoted the miniaturization and multifunctionality of encryption ***,with the few number of degrees of freedom(DoFs)multiplexed by single metasurface,both key space and encoding space are *** address this issue,we propose a high-security and large-capacity optical encryption scheme based on perfect high-dimensional Poincare beams with expanded *** cascading two arrayed metasurfaces,more beam properties can be independently engineered,which gives rise to the extensively expanded key and encoding *** work provides a promising strategy for optical encryption with high security level and large information capacity and might facilitate the applications of Poincare beams in optical communications and quantum information.

关键词： Poincare beams Cascaded metasurfaces optical encryption

A scalable fish-school inspired self-assembled particle system for solar-powered water-solute separation

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National Science Review 2021年第10期8卷 50-59页

作者： Ning Xu Haoran Zhang Zhenhui Lin Jinlei Li Guoliang Liu Xiuqiang Li Wei Zhao Xinzhe Min Pengcheng Yao Lin Zhou Yan Song Bin Zhu Shining Zhu Jia Zhu National laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesKey Laboratory of Intelligent Optical Sensing and ManipulationMinistry of EducationJiangsu Key Laboratory of Artificial Functional MaterialsNanjing University

Complete separation of water and solute is the ultimate goal of water treatment, for maximized resource recycling. However, commercialized approaches such as evaporative crystallizers consume a large amount of electricity with a significant carbon footprint, leading to calls for alternative energy-efficient and eco-friendly strategies. Here, inspired by schooling fish, we demonstrate a collective system self-assembled by expanded polystyrene（EPS）-core/graphene oxide（GO）-shell particles, which enables autonomous,efficient and complete water-solute separation powered by sunlight. By taking advantage of surface tension,these tailored particles school together naturally and are bonded as a system to function collectively and coordinatively, to nucleate, grow and output salt crystals continuously and automatically out of even saturated brine, to complete water-solute separation. Solar-vapor conversion efficiency over 90% and salt production rate as high as 0.39 kg m-2h-1are achieved under 1-sun illumination for this system. It reduces the carbon footprint of ～50 kg for treating 1-ton saturated brine compared with the commercialized approaches.

关键词： solar-vapor conversion self-assemble collective system water-solute separation

Advances in phase-sensitive optical time-domain reflectometry

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Opto-Electronic Advances 2022年第3期5卷 25-52,I0001页

作者： Shuaiqi Liu Feihong Yu Rui Hong Weijie Xu Liyang Shao Feng Wang Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518000China key laboratory of intelligent optical sensing and manipulation Ministry of EducationNanjing UniversityNanjing 210023China

Phase-sensitive optical time-domain reflectometry(Φ-OTDR)has attracted numerous attention due to its superior performance in detecting the weak perturbations along the *** on the ultra-sensitivity of light phase to the tiny deformation of optical fiber,Φ-OTDR has been treated as a powerful technique with a wide range of *** is fundamental to extract the phase of scattering light wave accurately and the methods include coherent detection,I/Q demodulation,3 by 3 coupler,dual probe pulses,and so ***,researchers have also made great efforts to improve the performance ofΦ-*** frequency response range,the measurement accuracy,the sensing distance,the spatial resolution,and the accuracy of event discrimination,all have been enhanced by various ***,lots of researches on the applications in various kinds of fields have been carried out,where certain modifications and techniques have been ***,Φ-OTDR remains as a booming technique in both researches and applications.

关键词： optical fiber sensors Ф-OTDR phase demodulation application research

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Efficient generation of vectorial terahertz beams using surface-wave excited metasurfaces

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Opto-Electronic Science 2025年第1期4卷 1-11页

作者： Zhuo Wang Weikang Pan Yu He Zhiyan Zhu Xiangyu Jin Muhan Liu Shaojie Ma Qiong He Shulin Sun Lei Zhou State key laboratory of Surface Physics and key laboratory of Micro and Nano Photonic Structures(Ministry of Education) Fudan UniversityShanghai 200433China Shanghai Engineering Research Centre of Ultra Precision optical Manufacturing Department of Optical Science and EngineeringSchool of Information Science and TechnologyFudan UniversityShanghai 200433China Shanghai key laboratory of Metasurfaces for Light manipulation Shanghai 200433China Yiwu Research Institute of Fudan University Chengbei RoadYiwu City 322000China.

On-chip devices for generating pre-designed vectorial optical fields(VOFs)under surface wave(SW)excitations are highly desired in integrated ***,conventional devices are usually of large footprints,low efficiencies,and limited wave-control ***,we present a generic approach to design ultra-compact on-chip devices that can efficiently generate pre-designed VOFs under SW excitations,and experimentally verify the concept in terahertz(THz)*** first describe how to design SW-excitation metasurfaces for generating circularly polarized complex beams,and experimentally demonstrate two meta-devices to realize directional emission and focusing of THz waves with oppo-site circular polarizations,*** then establish a systematic approach to construct an integrated device via merging two carefully designed metasurfaces,which,under SW excitations,can separately produce pre-designed far-field patterns with different circular polarizations and generate target VOF based on their *** a proof of con-cept,we demonstrate experimentally a meta-device that can generate a radially polarized Bessel beam under SW excita-tion at~0.4 *** results agree well with full-wave simulations,collectively verifying the performance of our *** study paves the road to realizing highly integrated on-chip functional THz devices,which may find many ap-plications in biological sensing,communications,displays,image multiplexing,and beyond.

关键词： surface waves vector beam multi-pixel metasurface terahertz ultrathin and high-efficiency

Cascaded chiral birefringent media enabled planar lens with programable chromatic aberration

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PhotoniX 2024年第1期5卷 411-423页

作者： Dewei Zhang Chun-Ting Xu Quan-Ming Chen Han Cao Hong-Guan Yu Qing-Gui Tan Yan-qing Lu Wei Hu National laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210023China National key laboratory of Science and Technology on Space Microwave China Academy of Space TechnologyXi‘anChina

Wavefront control is the fundamental requirement in optical *** optics have drawn intensive attention due to the merits of compactness and light ***,it remains a challenge to freely manipulate the dispersion,hindering practical applications,especially in ***,we propose the concept of frequencysynthesized phase engineering to solve this problem.A phasefront-frequency matrix is properly designed to encode different spatial phases to separate frequencies,thus makes arbitrary dispersion tailoring and even frequency-separated functionalization *** periodically rotated director endows cholesteric liquid crystal with a spin and frequency selective ***,via presetting the local initial orientation of liquid crystal,geometric phase is encoded to the reflected *** verify the proposed strategy by cascading the chiral anisotropic optical media of specifically designed helical pitches and initial director *** this means,planar lenses with RGB achromatic,enhanced chromatic aberration and color routing properties are ***-sized and high-efficient lenses are fabricated with low crosstalk among *** releases the freedom of dispersion control of planar optics,and even enables frequency decoupled phase *** work brings new insights to functional planar optics and may upgrade the performance of existing optical apparatuses.

关键词： Liquid crystals Planar lens Dispersion programmable Spatial light modulation

The revival of thermal utilization from the Sun: interfacial solar vapor generation

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National Science Review 2019年第3期6卷 562-578页

作者： Lin Zhou Xiuqiang Li George W.Ni Shining Zhu Jia Zhu National laboratory of Solid State Microstructures College of Engineering and Applied Sciences School of Physics Key Laboratory of Intelligent Optical Sensing and Manipulation Ministry of Education Collaborative Innovation Center of Advanced Microstructures Nanjing University Department of Mechanical Engineering Massachusetts Institute of Technology

Since solar energy is the ultimate energy resource and a significant amount of global energy utilization goes through heat, there have been persistent efforts for centuries to develop devices and systems for solar–thermal conversion. Most recently, interfacial solar vapor generation, as an emerging concept of solar–thermal conversion, has gained significant attention for its great potentials in various fields such as desalination, sterilization, catalysis, etc. With the advances of rationally designed materials and structures and photon and thermal management at the nanoscale, interfacial solar vapor generation has demonstrated both thermodynamic and kinetical advantages over conventional strategies. In this review, we aim to illustrate the definition, mechanism and figures of merit of interfacial solar vapor generation, and to summarize the development progress of relevant materials and applications, as well as to provide a prospective view of the future.

关键词： solar vapor generation solar absorber solar evaporator interfacial heating