Tunable and Anisotropic Dual-Band Metamaterial Absorber Using Elliptical Graphene-Black Phosphorus Pairs

Tunable and Anisotropic Dual-Band Metamaterial Absorber Using Elliptical Graphene-Black Phosphorus Pairs

Abstract We numerically propose a dual-band absorber in the infrared region based on periodic elliptical graphene-black phosphorus (BP) pairs. The proposed absorber exhibits near-unity anisotropic absorption for both resonances due to the combination of graphene and BP. Each of the resonances is ind...

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Bibliographic Details
Main Authors: Yijun Cai, Shuangluan Li, Yuanguo Zhou, Xuanyu Wang, Kai-Da Xu, Rongrong Guo, William T. Joines
Format: Article
Language:English
Published: SpringerOpen 2019-11-01
Series:Nanoscale Research Letters
Subjects:
Metamaterial absorber
Two-dimensional material
Dual-band absorber
Surface plasmons
Online Access:http://link.springer.com/article/10.1186/s11671-019-3182-9
Description
Summary:Abstract We numerically propose a dual-band absorber in the infrared region based on periodic elliptical graphene-black phosphorus (BP) pairs. The proposed absorber exhibits near-unity anisotropic absorption for both resonances due to the combination of graphene and BP. Each of the resonances is independently tunable via adjusting the geometric parameters. Besides, doping levels of graphene and BP can also tune resonant properties effectively. By analyzing the electric field distributions, surface plasmon resonances are observed in the graphene-BP ellipses, contributing to the strong and anisotropic plasmonic response. Moreover, the robustness for incident angles and polarization sensitivity are also illustrated.
ISSN:1931-7573
1556-276X

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