Multi-band light-matter interaction in hBN-based metasurface absorber

Date
2022-09-28
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Source Title
International Conference on Electromagnetics in Advanced Applications (ICEAA)
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Publisher
Institute of Electrical and Electronics Engineers
Volume
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Pages
091 - 092
Language
English
Type
Conference Paper
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Abstract

This paper presents a multi-band metamaterial-based absorber using phononic two-dimensional (2D) material. The structure consists of a top hexagonal boron nitride (hBN) layer on an aluminum nanograting structure deposited on a dielectric slab waveguide and a thick metallic reflector forming an MIM (metal-insulator-metal) configuration. The proposed absorber exhibits a hyperbolic phonon polariton (HPPs) in hBN, surface plasmon (SP) modes in the spacer (ZnTe: zinc telluride), and Fabry-Perot resonances in the MIM configuration, resulting in five sharp, high absorption peaks in the mid-infrared (MIR) spectral range. The proposed multi-band absorber can be utilized in various applications, ranging from optical detection devices to multispectral thermoelectric volt.

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Keywords
Multi-band perfect absorbers, Metasurfaces, Plasmon-phonon polaritons, Polar materials
Citation
Published Version (Please cite this version)