Design of near-field plasmonic vortex with shifting based on metasurface in terahertz region

Zhen LI

doi:10.3969/j.issn.1005-5630.2020.05.010

Journals >Optical Instruments >Volume 42 >Issue 5 >Page 63 > Article

Optical Instruments
Vol. 42, Issue 5, 63 (2020)

Design of near-field plasmonic vortex with shifting based on metasurface in terahertz region

Zhen LI^1,2

Author Affiliations

¹Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China

²School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

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DOI: 10.3969/j.issn.1005-5630.2020.05.010 Cite this Article

Zhen LI. Design of near-field plasmonic vortex with shifting based on metasurface in terahertz region[J]. Optical Instruments, 2020, 42(5): 63 Copy Citation Text

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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.

Keywords

metasurface near-field plasmonic vortex

$ {\varphi _{\rm{RCP}}} = {\rm{arg}}\left\{ {\exp \left[ {2\pi *\left( {p \!\!+ \!\!s \!\!-\!v \sqrt {{p^2} \!\!+\!\! {s^2} + 2*p*s*\cos \left( {\theta \! \!- \!\!{\theta _0}} \right)} } \right)} \right]} \right\}$

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