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Few-layer metasurfaces with arbitrary scattering properties

Science China(Physics,Mechanics & Astronomy) 2020年第8期63卷 2-13页

作者： zhancheng li Wenwei liu Hua Cheng Shuqi Chen The Key Laboratory of Weak light Nonlinear Photonics Ministry of EducationSchool of Physics and TEDA Institute of Applied PhysicsRenewable Energy Conversion and Storage CenterNankai UniversityTianjin 300071China The Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Collaborative Innovation Center of light Manipulations and Applications Shandong Normal UniversityJinan 250358China

Metasurfaces,which are planar arrays of subwavelength artificial structures,have emerged as excellent platforms for the integration and miniaturization of electromagnetic devices and provided ample possibilities for single-dimensional and multi-dimensional manipulations of electromagnetic ***,owing to the limited interactions between planar thin metallic nanostructures and electromagnetic waves as well as intrinsic losses in metals,metasurfaces exhibit disadvantages in terms of efficiency,controllability,and *** advances in this field show that few-layer metasurfaces can overcome these ***-layer metasurfaces composed of more than one functional layer enable more degrees of design ***,they possess unprecedented capabilities for electromagnetic wave manipulation,which have considerable impact in the area of *** article reviews recent advances in few-layer metasurfaces from the viewpoint of their scattering *** scattering matrix theory is briefly introduced,and the advantages and drawbacks of few-layer metasurfaces for the realization of arbitrary scattering properties are ***,a detailed overview of typical few-layer metasurfaces with various scattering properties and their design principles is ***,an outlook on the future directions and challenges in this promising research area is presented.

关键词： few-layer metasurfaces light-matter interaction scattering matrix full-space manipulation

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Few-layer metasurfaces with engineered structural symmetry

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Science China(Physics,Mechanics & Astronomy) 2021年第6期64卷 125-126页

作者： zhancheng li Hua Cheng ShuQi Chen Key Laboratory of Weak light Nonlinear Photonics Ministry of EducationSchool of Physics and TEDA Institute of Applied PhysicsNankai UniversityTianjin 300071China The Collaboraive Innovation Center of Extreme Optics Shanxi UnjversityTaiyuan 030006China Collaborative Innovation Center of light Manipulations and Applications Shandong Normal UniversityJinan 250358China

Metasurfaces are planar arrays composed of artificial nanostructures at the subwavelength *** the first demonstration of their excellent capacity in the phase manipulation of optical waves,metasurfaces have attracted increasing attention in optics and other disciplines,with extraordinary progress over the past *** unique capabilities of metasurfaces in the multidimensional manipulation of optical waves have made them versatile and powerful platforms for integrating and minimizing optical devices[1,2].

关键词： surfaces symmetry versatile

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Enhanced wide-angle third-harmonic generation in flat-band-engineered quasi-BIC metagratings

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 81-87页

作者： Yijia Zang Ruoheng Chai Wenwei liu zhancheng li Hua Cheng Jianguo Tian Shuqi Chen The Key Laboratory of Weak light Nonlinear Photonics Ministry of EducationSchool of Physics and TEDA Institute of Applied PhysicsNankai UniversityTianjin 300071China School of Materials Science and Engineering Smart Sensing Interdisciplinary Science CenterNankai UniversityTianjin 300350China The Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Nonlinear metasurfaces and photonic crystals provide a significant way to generate and manipulate nonlinear signals owing to the resonance-and symmetry-based light-matter interactions supported by the artificial ***,the nonlinear conversion efficiency is generally limited by the angular dispersion of optical resonances especially in nonparaxial ***,we propose a metagrating realizing a quasi-bound-state in the continuum in a flat band to dramatically improve the third harmonic generation(THG)efficiency.A superior operating angular range is achieved based on the interlayer and intralayer couplings,which are introduced by breaking the mirror symmetry of the *** demonstrate the relation of angular dispersion between the nonlinear and linear responses at different incident *** also elucidate the mechanism of these offaxis flat-band-based nonlinear conversions through different mode *** scheme provides a robust and analytical way for nonparaxial nonlinear generation and paves the way for further applications such as wide-angle nonlinear information transmission and enhanced nonlinear generation under tight focusing.

关键词： nonlinear metasurfaces quasi-bound-state in the continuum angular dispersion third harmonic generation efficiency

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Controllable optical activity with non-chiral plasmonic metasurfaces

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light(Science & Applications) 2016年第1期5卷 646-652页

作者： Ping Yu Jianxiong li Chengchun Tang Hua Cheng Zhaocheng liu zhancheng li Zhe liu Changzhi Gu Junjie li Shuqi Chen Jianguo Tian The MOE Key Laboratory of Weak light Nonlinear Photonics School of PhysicsTeda Applied Physics Instituteand the 2011 Project Collaborative Innovation Center for Biological TherapyNankai UniversityTianjin 300071China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Optical activity is the rotation of the plane of linearly polarized light along the propagation direction as the light travels through optically active *** existing methods,the strength of the optical activity is determined by the chirality of the materials,which is difficult to control *** we numerically and experimentally investigated an alternative approach to realize and control the optical activity with non-chiral plasmonic *** judicious design of the structural units of the metasurfaces,the right and left circular polarization components of the linearly polarized light have different phase retardations after transmitting through the metasurfaces,leading to large optical ***,the strength of the optical activity can be easily and accurately tuned by directly adjusting the phase *** proposed approach based on non-chiral plasmonic metasurfaces exhibits large optical activity with a high controllable degree of freedom,which may provide more possibilities for applications in photonics.

关键词： metasurfaces optical activity surface plasmon polaritons

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Color-selective three-dimensional polarization structures

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light(Science & Applications) 2022年第11期11卷 2706-2715页

作者： Yuttana Intaravanne Ruoxing Wang Hammad Ahmed Yang Ming Yaqin Zheng Zhang-Kai Zhou zhancheng li Shuqi Chen Shuang Zhang Xianzhong Chen Institute of Photonics and Quantum Sciences School of Engineering and Physical SciencesHeriot-Watt UniversityEdinburgh EH144ASUK Department of Mathematics and Physics North China Electric Power UniversityBaoding 071003China School of Physics and Electronic Engineering Changshu Institute of TechnologySuzhou 215000China State Key Laboratory of Optoelectronic Materials and Technologies School of PhysicsSun Yat-sen UniversityGuangzhou 510275China School of Physics and TEDA Applied Physics Institute Nankai University94 Weijin RoadTianjin 300071China Department of Physics University of Hong KongHong KongChina Department of Electronic&Electrical Engineering University of Hong KongHong KongChina

Polarization as an important degree of freedom for light plays a key role in *** beams with controlled polarization profles have diverse applications,such as information encoding,display,medical and biological imaging,and manipulation of ***,conventional polarization optics can only realize two-dimensional polarization structures in a transverse *** emergent ultrathin optical devices consisting of planar nanostructures,so-called metasurfaces,have shown much promise for polarization *** we propose and experimentally demonstrate color-selective three-dimensional(3D)polarization structures with a single *** geometric metasurfaces are designed based on color and phase multiplexing and polarization rotation,creating various 3D polarization ***,different 3D polarization knots in the same observation region can be achieved by controlling the incident wavelengths,providing unprecedented polarization control with color information in 3D *** research findings may be of interest to many practical applications such as vector beam generation,virtual reality,volumetric displays,security,and anti-counterfeiting.

关键词： polarization optics dimensional

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Electromagnetic wave manipulation based on few-layer metasurfaces and polyatomic metasurfaces

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ChemPhysMater 2022年第1期1卷 6-16页

作者： Shiwang Yu Jiaqi Cheng zhancheng li Wenwei liu Hua Cheng Jianguo Tian Shuqi Chen The Key Laboratory of Weak light Nonlinear Photonics Ministry of EducationRenewable Energy Conversion and Storage CenterSchool of Physics and TEDA Institute of Applied PhysicsNankai UniversityTianjin 300071China The Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Metasurfaces,whose electromagnetic(EM)responses can be artificially designed,are two-dimensional arrays composed of subwavelength *** by various fascinating developments in the past decade,metasurfaces have been proved as a powerful platform for the implementation of EM wave ***,the planar monoatomic metasurfaces widely used in previous works have limited design freedoms,resulting in some disadvantages for the realization of high-performance and new functional EM wave *** latest developments show that few-layer metasurfaces and polyatomic metasurfaces are good alternatives to overcome the drawbacks of planar monoatomic metasurfaces and realize high-efficient,multi-band and broad-band EM *** provide additional degrees of design freedom via introducing multilayer layouts or combining multiple meta-atoms into a unit cell ***,recent advances of few-layer and polyatomic metasurfaces are *** design strategies,EM properties and main advantages of few-layer metasurfaces and polyatomic metasurfaces are overviewed ***,few-layer metasurfaces and polyatomic metasurfaces in recent progress for EM wave manipulation are classified and discussed from the viewpoint of their design *** last,an outlook on future development trends and potential applications in these fast-developing research areas is presented.

关键词： EM wave manipulation Few-layer metasurfaces Polyatomic metasurfaces Collective interference

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复合穿孔板吸声结构的声学特性分析与应用

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农业机械学报 2007年第12期38卷 156-159页

作者：周晋花左言言李占成史文献江苏大学汽车与交通工程学院

对带有吸声材料的复合穿孔板吸声结构的声学特性进行了研究与计算,比较了吸声材料紧贴穿孔板和吸声材料紧贴刚性壁时吸声结构的吸声性能,分析了吸声结构的参数对吸声性能的影响,为穿孔板吸声结构的工程应用提供了参考依据。将复合穿孔... 详细信息

对带有吸声材料的复合穿孔板吸声结构的声学特性进行了研究与计算,比较了吸声材料紧贴穿孔板和吸声材料紧贴刚性壁时吸声结构的吸声性能,分析了吸声结构的参数对吸声性能的影响,为穿孔板吸声结构的工程应用提供了参考依据。将复合穿孔板吸声结构应用到工程实际中,取得了良好的降噪效果。

关键词：穿孔板吸声特性应用

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叶绿素仪在玉米氮营养诊断及推荐施肥中的研究与应用

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作物杂志 2011年第4期 58-62页

作者：李占成李玮梁秀枝杨富山西省农业科学院高寒区作物研究所山西大同037008 山西农业大学经济贸易学院山西太谷030801

叶绿素仪由于具有方便、灵巧、快速测定、准确,以及非破坏性的特点,近年来在氮素营养诊断及推荐施肥中越来越得到重视。通过田间试验研究表明,叶绿素仪测定值与玉米叶片全氮含量、玉米子粒产量以及施氮量之间均有显著相关性。对叶绿素... 详细信息

叶绿素仪由于具有方便、灵巧、快速测定、准确,以及非破坏性的特点,近年来在氮素营养诊断及推荐施肥中越来越得到重视。通过田间试验研究表明,叶绿素仪测定值与玉米叶片全氮含量、玉米子粒产量以及施氮量之间均有显著相关性。对叶绿素仪测定值的预测精度进行初步研究,经过矫正后,叶绿素仪测定值推荐施肥预测玉米产量的精度为68%,预测玉米的最佳施氮量为175kg/hm2。

关键词：玉米叶绿素测定值营养诊断推荐施肥

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基于虚拟仪器技术的农田气象信息远程监测系统开发

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农机化研究 2014年第9期36卷 81-84页

作者：张兰英邓铭辉李占成东北农业大学电气与信息学院哈尔滨150030

为了进行农田气象信息的远程监控,开发出一个基于LabVIEW语言的虚拟仪器技术系统。系统由室外自动气象站和气象信息管理系统组成,主控系统由采集器控制田间传感器对气象信息的定时连续采集,同时通过通信模块把收集到气象数据传输到集成L... 详细信息

为了进行农田气象信息的远程监控,开发出一个基于LabVIEW语言的虚拟仪器技术系统。系统由室外自动气象站和气象信息管理系统组成,主控系统由采集器控制田间传感器对气象信息的定时连续采集,同时通过通信模块把收集到气象数据传输到集成LabVIEW的气象信息管理系统中,通过程序对数据信息的统计分析,直观地把结果呈现出来。该系统的成功开发,提高了农业气象信息监测的连续性和准确性,可用以评估气象信息对农业生产的危害程度,提高应对突发天气状况的能力,对实现农业现代化、信息化具有重要的现实意义。

关键词：虚拟仪器 LabVIEW 农田气象信息监测

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化学抑尘剂专利申请现状及技术进展

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化工矿物与加工 2023年第6期52卷 32-37+44页

作者：胡新涛李占成国家知识产权局专利局专利审查协作江苏中心

随着矿业、建材、冶金等行业的快速发展，可吸入颗粒物已成为大气中的一种主要污染物，化学抑尘剂对于可吸入颗粒物具有有效的控制作用。梳理了化学抑尘剂领域的专利申请量变化趋势和申请人类型分布，总结了化学抑尘剂的技术发展路线，... 详细信息

随着矿业、建材、冶金等行业的快速发展，可吸入颗粒物已成为大气中的一种主要污染物，化学抑尘剂对于可吸入颗粒物具有有效的控制作用。梳理了化学抑尘剂领域的专利申请量变化趋势和申请人类型分布，总结了化学抑尘剂的技术发展路线，阐述了润湿型、黏结型、凝聚型、生态环保型和功能型化学抑尘剂的技术研究进展，以期为相关领域的企业和科研机构的技术研发及知识产权保护提供参考。

关键词：化学抑尘剂专利申请可吸入颗粒物生态环保型功能型高价值专利

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