检索结果-南通市图书馆

All-silicon chiral metasurfaces and wavefront shaping assisted by interference

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2021年第11期64卷 69-77页

作者： Chenglong Zheng Jie Li Jitao Li Zhen Yue Silei Wang Mengyao Li Hongliang Zhao xuanruo hao Huaping Zang Yating Zhang Jianquan Yao Key Laboratory of Opto-Electronics Information Technology(Tianjin University) Ministry of EducationSchool of Precision Instruments and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China

Chiral metasurfaces have different electromagnetic responses with circularly polarized lights,showing as circular dichroism and optical ***,a novel kind of all-silicon chiral metasurface is proposed by introducing destructive interference between achiral *** maximum value of circular dichroism spectra can reach *** adding an antireflective layer at the side of the silicon substrate,the maximum circular dichroism reaches *** is more,the bandwidth of circular dichroism greater than 0.4 reaches 0.15 *** samples are fabricated to verify the feasibility of this scheme,and the experimental results are in good agreement with the *** addition,the proposed scheme can also be used to generate various interesting functions,such as beam control and vortex *** flexible and efficient implementation solution of chiral metasurface can bring new ideas to the development of chiral devices in the future.

关键词： metasurface chiral terahertz decoupling

Terahertz wavefront shaping with multi-channel polarization conversion based on all-dielectric metasurface

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2021年第10期9卷 1939-1947页

作者： JIE LI CHENGLONG ZHENG JITAO LI GUOCUI WANG JINGYU LIU ZHEN YUE xuanruo hao YUE YANG FUYU LI TINGTING TANG YATING ZHANG YAN ZHANG JIANQUAN YAO Key Laboratory of Opto-Electronics Information Technology(Tianjin University) Ministry of EducationSchool of Precision Instruments and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China Beijing Key Laboratory for Metamaterials and Devices Key Laboratory of Terahertz OptoelectronicsMinistry of Educationand Beijing Advanced Innovation Center for Imaging TechnologyDepartment of PhysicsCapital Normal UniversityBeijing 100048China Beijing Engineering Research Center for Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Information Materials and Device Applications Key Laboratory of Sichuan Provincial Universities Chengdu University of Information TechnologyChengdu 610225China

Polarization manipulation of electromagnetic wave or polarization multiplexed beam shaping based on metasurfaces has been reported in various frequency ***,it is difficult to shape the beam with multi-channel polarization conversion in a single ***,we propose a new method for terahertz wavefront shaping with multi-channel polarization conversion via all-silicon metasurface,which is based on the linear shape birefringence effect in spatially interleaved anisotropic *** superimposing the eigen-and non-eigen-polarization responses of the two kinds of meta-atoms,we demonstrate the possibility for high-efficiency evolution of several typical polarization states with two independent channels for linearly polarized *** measured polarization conversion efficiency is higher than 70%in the range of 0.9–1.3 THz,with a peak value of 89.2%at 1.1 *** addition,when more other polarization states are incident,combined with the integration of sub-arrays,we can get more channels for both polarization conversion and beam *** and experimental results verify the feasibility of this *** proposed method provides a new idea for the design of terahertz multi-functional metadevices.

关键词： surface. method. dielectric

Manipulation of polarization conversion and multiplexing via all-silicon phase-modulated metasurfaces

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2022年第4期20卷 82-86页

作者： Zhen Yue Jitao Li Chenglong Zheng Jie Li Mingyang Chen xuanruo hao Hang Xu Qi Wang Yating Zhang Jianquan Yao Key Laboratory of Opto-Electronics Information Technology(Tianjin University) Ministry of EducationSchool of Precision Instruments and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China Department of Optoelectronic Information Science and Engineering Jiangsu UniversityZhenjiang 212013China

Phase-modulated metasurfaces that can implement the independent manipulation of co-and cross-polarized output waves under circularly polarized[CP]incidence have been *** this,we introduce one particular metasurface composed of meta-atoms with a phase difference of 2π/3 to generate specific elliptically polarized waves under various polarized ***,a metasurface composed of these above meta-atoms and the meta-atoms with a phase difference of π/3 arranged in a certain rule can realize polarization conversion function between linearly polarized and CP *** designs shed new light on multifarious optical devices and may further promote the development of metasurface polarization optics.

关键词： phase-modulated metasurfaces polarization conversion multiplexing

在线全文

学校读者我要写书评

暂无评论

全介质超表面中的手性太赫兹响应

太赫兹科学与电子信息学报 2021年第5期19卷 800-803页

作者：李杰郑程龙李继涛岳震郝璇若张雅婷姚建铨天津大学激光与光电子研究所天津300072

基于单层金属手性谐振器的超表面在垂直入射条件下很难激发较大的手性光学响应,难以形成与电偶极矩不正交的面内磁偶极矩分量。光场在介质超原子中激发的位移电流可能引发面内磁矩,进而实现高效的手性光学响应。基于无损的全硅超表面在... 详细信息

基于单层金属手性谐振器的超表面在垂直入射条件下很难激发较大的手性光学响应,难以形成与电偶极矩不正交的面内磁偶极矩分量。光场在介质超原子中激发的位移电流可能引发面内磁矩,进而实现高效的手性光学响应。基于无损的全硅超表面在太赫兹波段实现了巨大的手性响应。手性硅柱中的泄露波导模式同时激发了面内电偶和磁偶极矩,从而引发了自旋选择的后向电磁辐射,进而实现了太赫兹波的手性光学响应。利用线栅偏振片搭建了偏振相关的时域光谱测试系统,测得透射光谱中的圆二色性峰值达0.2。这种制备简单的全硅超表面为太赫兹手性超器件的设计提供了新的思路,有望应用于太赫兹偏振成像、光谱检测等领域。

关键词：太赫兹波手性全介质超表面圆偏振