Broadband absorber based on metamaterials

Mian Wu; Shilin Yu; Ziang Gao; Dafa Pan; Tonggang Zhao

doi:10.1117/12.2642416

4 January 2023 Broadband absorber based on metamaterials

Mian Wu, Shilin Yu, Ziang Gao, Dafa Pan, Tonggang Zhao

Proceedings Volume 12322, Nanophotonics, Micro/Nano Optics, and Plasmonics VIII; 123220N (2023) https://doi.org/10.1117/12.2642416
Event: SPIE/COS Photonics Asia, 2022, Online Only

Conference Poster

Abstract

We proposed a multilayer infrared metamaterial absorber with metal-insulator-metal (MIM) stacks and patterned nanostructured surfaces for ultra-broadband infrared applications. Chromium (Cr) and silicon dioxide (SiO2) were designated as the main materials of the absorber considering assessing the real functionalities of several metals and insulator materials in the structure. Furthermore, the electromagnetic field distribution shows that the stacks of different MIMs above the structure excite absorption peaks in distinct wavelength ranges, and the absorption range can be enlarged by manipulating structural parameters. The average absorptivity is higher than 80% throughout a wide wavelength range of 780 nm to 5500 nm, according to results of numerical simulation. The absorption spectrum encompasses the entire near-infrared and mid-infrared range, and it has promising applications in spectral sensing, infrared light sources, and detectors.

Citation Download Citation

Mian Wu, Shilin Yu, Ziang Gao, Dafa Pan, and Tonggang Zhao "Broadband absorber based on metamaterials", Proc. SPIE 12322, Nanophotonics, Micro/Nano Optics, and Plasmonics VIII, 123220N (4 January 2023); https://doi.org/10.1117/12.2642416

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