| 基于单层超表面的双频太赫兹波线偏振变圆偏振转换器 |
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| 引用本文： | 刘素吉,臧小飞,朱亦鸣.基于单层超表面的双频太赫兹波线偏振变圆偏振转换器[J].光学仪器,2017,39(3):16-20. |
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| 作者姓名： | 刘素吉 臧小飞 朱亦鸣 |
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| 作者单位： | 上海理工大学 上海市现代光学系统重点实验室,上海 200093;上海理工大学 光电信息与计算机工程学院, 上海 2300093 |
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| 基金项目： | 国家重大基础研究项目973计划（2014CB339806）；国家自然科学基金项目（61307126） |
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| 摘 要： | 提出了一种基于单层超表面的双频太赫兹波线偏振变圆偏振转换器。该偏振转换器采用两个不同尺寸的十字型金属缝阵列结构形成两个线偏振变圆偏振转换频点,从而实现双频的太赫兹波线偏振变圆偏振转换。计算结果表明,设计的偏振转换器能在0.760THz和1.068THz将一束线偏振太赫兹波转换为圆偏振太赫兹波。该双频的线偏振变圆偏振转换器仅由单层的超表面组成,结构简单易于制备,因而为操控电磁波和设计新颖的太赫兹波器件提供了参照。
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| 关 键 词： | 太赫兹波 线偏振变圆偏振转换器 超表面 双频 |
| 收稿时间： | 2016/12/24 0:00:00 |
Dual-band terahertz linear-to-circular polarization converter based on single-layer metasurface |
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| LIU Suji,ZANG Xiaofei and ZHU Yiming.Dual-band terahertz linear-to-circular polarization converter based on single-layer metasurface[J].Optical Instruments,2017,39(3):16-20. |
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| Authors: | LIU Suji ZANG Xiaofei and ZHU Yiming |
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| Affiliation: | Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China;School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China,Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China;School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China and Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China;School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China |
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| Abstract: | In this paper,we propose a dual-band terahertz linear-to-circular(LTC) polarization converter based on single-layer metasurface consisting of two different-sized metallic cross apertures.Each of them can be considered as a separated single-band LTC polarization converter on the corresponding resonance frequency,leading to a dual-band characteristic.Simulation result shows that the polarization converter can convert linearly-polarized terahertz wave into the left-handed circularly-polarized terahertz wave at 0.760 THz and 1.068 THz,respectively.In addition,this kind of dual-band LTC polarization converter is composed of single-layer metasurface which is beneficial to device fabrication.Such polarization converter will provide a reference for manipulating electromagnetic wave and designing novel terahertz devices. |
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| Keywords: | terahertz linear-to-circular polarization converter metasurface dual-band |
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