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Open AccessArticle

Polarization-Independent Tunable Ultra-Wideband Meta-Absorber in Terahertz Regime

Beijing Key Laboratory of Network System Architecture and Convergence, Beijing University of Posts and Telecommunications, Beijing 100876, China
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Electronics 2019, 8(8), 831; https://doi.org/10.3390/electronics8080831
Received: 23 May 2019 / Revised: 16 July 2019 / Accepted: 17 July 2019 / Published: 26 July 2019
(This article belongs to the Special Issue Applications of Electromagnetic Waves)
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Abstract

In this paper, we demonstrate an ultra-broadband terahertz bilayer graphene-based absorption structure. It has two stacking graphene layers sandwiched by an Au cylinders array, backed by a metallic ground plane. Au cylinders are used to adjust the input impedance to be closely matched to the free space, enabling an ultra-broadband absorption. The absorption spectrum of the bilayer graphene-based absorption structure with Au cylinder arrays shows a bandwidth of 7.1 THz, with the absorption exceeding 80%. The achieved ultra-wideband THz meta-absorber has high absorption, independence of polarization property, simultaneously, illustrating to be a promising candidate for teraherz broadband absorption application. View Full-Text
Keywords: ultra-wideband; THz absorber; high absorption; polarization independent ultra-wideband; THz absorber; high absorption; polarization independent
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Liu, S.; Deng, L.; Qu, M.; Li, S. Polarization-Independent Tunable Ultra-Wideband Meta-Absorber in Terahertz Regime. Electronics 2019, 8, 831.

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