Integrating two epsilon-near-zero materials into planar multilayer metamaterial structure for broadband near-perfect mid-IR absorption

被引：3
|
作者：
Almossalami, Hossam A. [1 ,2 ]
Liang, Sen [1 ]
Zheng, Jun [1 ]
Ye, Hui [1 ]
机构：
[1] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China
[2] Zagazig Univ, Phys Dept, Fac Sci, Zagazig 44519, Egypt
来源：
OPTICAL MATERIALS EXPRESS | 2022年 / 12卷 / 04期
基金：
中国国家自然科学基金;
关键词：
LIGHT-ABSORPTION; BERREMAN MODE; ABSORBERS; SILICON; EFFICIENCY; CONVERSION; BANDWIDTH; FILMS;
D O I：
10.1364/OME.451597
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Absorptive metamaterials composed of antimony-doped-germanium of different epsilon-near-zero wavelengths and germanium films are designed and fabricated for broadband perfect light absorption around the epsilon-near-zero wavelengths. By integrating two bilayers separated by a semiconductor spacer into a metamaterial structure backed by substrate and gold thick ground plane, we realize more than 93% P-polarized light absorption over a wavelength range of 1.8 microns for an angle of incidence of 40 degrees and a flat-top 75% absorption over a wideband of 1.74 microns for an angle of incidence of 50 degrees in the middle wave infrared region. (c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码：1374 / 1385
页数：12
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