Dual-Band High Efficiency Terahertz Meta-Devices Based on Reflective Geometric Metasurfaces

Tailei Wang; Rensheng Xie; Shouzheng Zhu; Jianjun Gao; Mingbo Xin; Sensong An; Bowen Zheng; Hang Li; Yuankun Lin; Hualiang Zhang; Guohua Zhai; Jun Ding

doi:10.1109/ACCESS.2019.2912017

IEEE Access (Jan 2019)

Dual-Band High Efficiency Terahertz Meta-Devices Based on Reflective Geometric Metasurfaces

Tailei Wang,
Rensheng Xie,
Shouzheng Zhu,
Jianjun Gao,
Mingbo Xin,
Sensong An,
Bowen Zheng,
Hang Li,
Yuankun Lin,
Hualiang Zhang,
Guohua Zhai,
Jun Ding

Affiliations

Tailei Wang: ORCiD; Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, China
Rensheng Xie: Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, China
Shouzheng Zhu: Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, China
Jianjun Gao: Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, China
Mingbo Xin: Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, China
Sensong An: Department of Electrical and Computer Engineering, University of Massachusetts Lowell, Lowell, MA, USA
Bowen Zheng: Department of Electrical and Computer Engineering, University of Massachusetts Lowell, Lowell, MA, USA
Hang Li: Department of Electrical and Computer Engineering, University of Massachusetts Lowell, Lowell, MA, USA
Yuankun Lin: Department of Physics, University of North Texas, Denton, TX, USA
Hualiang Zhang: Department of Electrical and Computer Engineering, University of Massachusetts Lowell, Lowell, MA, USA
Guohua Zhai: Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, China
Jun Ding: Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, Shanghai, China

DOI: https://doi.org/10.1109/ACCESS.2019.2912017
Journal volume & issue: Vol. 7
pp. 58131 – 58138

Abstract

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The wavelength-dependent behavior of the metasurface is one of the severe disadvantages in the metasurface-based applications, which greatly limits its applications. In this work, a novel reflective building block (unit cell) has been proposed to work at two arbitrary terahertz frequency bands with independent phase control at each band. The geometric phase building block can reflect the incident circularly polarized wave and convert it to the wave with opposite helicity and high conversion efficiencies at both bands. As proof of concept demonstrations, a dual-band cylindrical meta-lens and two vortex beam generators operating at 0.45 and 0.7 THz are investigated to verify the performance of the proposed building block. The simulated results of the metalens agree very well with the theoretical calculations, which are consistent with the design goals. Moreover, the designed vortex metasurfaces reveal a convenient and low-cost way to realize the vortex beam carrying different/same orbital angular momentum modes at two bands.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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