Ultra-thin midwavelength infrared absorber using bismuth based planar thin film metamaterials

Autor:	Qianqian Xu, Zhengji Wen, Xiaohang Pan, Chong Tan, Jinguo Zhang, Qianli Qiu, Yan Sun, Xin Chen, Ning Dai, Junhao Chu, Jiaming Hao
Rok vydání:	2022
Předmět:	General Engineering General Physics and Astronomy
Zdroj:	Applied Physics Express. 15:082005
ISSN:	1882-0786 1882-0778
DOI:	10.35848/1882-0786/ac8415
Popis:	We reveal the extraordinary potential of bismuth (Bi) based planar thin film metamaterials in achieving light perfect absorption for midwavelength infrared (MWIR) range from 3 to 6 μm. The proposed absorber is composed of an ultra-thin Bi film and a continuous metallic film separated by a dielectric spacer. Theoretical analyses show that the absorber exhibits narrowband absorption that can continuously span the whole MWIR range by varying the geometric parameters. Furthermore, it is found that the absorber displays wide-angle absorption up to 80° as well as polarization-insensitive properties. Experimental measurements are performed to corroborate the theoretical analyses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::64d75c7aa07659c2d2f611f30289c8d4 https://doi.org/10.35848/1882-0786/ac8415 Zobrazit plný text záznamu