Narrowband tunable graphene perfect absorber based on dielectric microcavity in mid-infrared

Yu Yu; Jing Zhou; Xiaoshuang Chen; Haowen Li; Dong Rui

doi:10.1117/12.2617400

9 December 2021 Narrowband tunable graphene perfect absorber based on dielectric microcavity in mid-infrared

Yu Yu, Jing Zhou, Xiaoshuang Chen, Haowen Li, Dong Rui

Proceedings Volume 12030, Third International Conference on Optoelectronic Science and Materials (ICOSM 2021); 1203017 (2021) https://doi.org/10.1117/12.2617400
Event: Third International Conference on Optoelectronic Science and Materials (ICOSM 2021), 2021, Hefei, China

Abstract

We numerically studied a simple and novel graphene-based dielectric microcavity narrowband perfect absorber. By electrically modulating the graphene Fermi level and critical coupling theory, our absorber achieves 100% perfect absorption at 8.0 μm in the mid-infrared, and the FWHM (full width at half-maximum) of the absorption peak is only 21 nm. We use the optical constants obtained from experimental data, including the mobility and surface conductivity of graphene, so the results are more applicable. In addition, the relatively simple structure of the dielectric microcavity graphene structure has a high tolerance for manufacturing defects.

Citation Download Citation

Yu Yu, Jing Zhou, Xiaoshuang Chen, Haowen Li, and Dong Rui "Narrowband tunable graphene perfect absorber based on dielectric microcavity in mid-infrared", Proc. SPIE 12030, Third International Conference on Optoelectronic Science and Materials (ICOSM 2021), 1203017 (9 December 2021); https://doi.org/10.1117/12.2617400

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