| 太赫兹超表面近场等离子体涡旋偏移器件设计 |
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| 引用本文： | 李振. 太赫兹超表面近场等离子体涡旋偏移器件设计[J]. 光学仪器, 2020, 42(5): 63-69 |
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| 作者姓名： | 李振 |
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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 200093 |
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| 摘 要： | 为了提升太赫兹（terahertz，THz）通讯容量，设计了一种基于单层超表面的激发近场等离子体涡旋偏移的太赫兹器件。基于几何相位超表面，采用FITD（时域有限积分）软件，对该器件的近场涡旋偏移进行了仿真研究。结果表明，所设计的器件在圆偏振光的入射下，能够实现空间任意位置的偏移。该类功能器件在一定程度上提升了太赫兹通讯容量，可应用于6G技术中。
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| 关 键 词： | 超表面 近场 等离子体涡旋 |
| 收稿时间： | 2020-04-21 |
Design of near-field plasmonic vortex with shifting based on metasurface in terahertz region |
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| LI Zhen. Design of near-field plasmonic vortex with shifting based on metasurface in terahertz region[J]. Optical Instruments, 2020, 42(5): 63-69 |
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| Authors: | LI Zhen |
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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 |
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| Abstract: | In this paper, a THz device based on single-layer metasurface has been designed to generate near-field plasmonic vortex with shifting functionality for increasing THz communication capacity. Based on the geometric metasurface, the shifting of near-field vortex of the device is simulated by FITD (the finite integration time domain). The corresponding results suggest that position shifting of the field distribution in the whole space can be achieved under the illumination of circularly polarized light. To a certain extent, the kind of functional devices can improve the THz communication capacity and can be used in 6G technology. |
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| Keywords: | metasurface near-field plasmonic vortex |
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