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We propose a graphene-based metamaterial for achieving tunable spectral absorptivity in the infrared. The metamaterial is modeled as a periodic array of electrically-tunable, coupled resonators. The structural parameters of the resonators are chosen to implement a dark-bright mode coupling scheme in the context of temporal coupled-mode theory. The spectral response of the metamaterial can be tuned from single-peaked to double-peaked absorption by tuning the resonance wavelengths of the constituent resonators relative to each other. Our results thus suggest the possibility of achieving tunable multi-band absorption using metamaterials composed of multiple coupled resonators.
Mashnoon A. Sakib,Romil Audhkhasi, andMichelle L. Povinelli
"Graphene-based metamaterial for on-demand spectral shaping in the mid-infrared (Conference Presentation)", Proc. SPIE PC12196, Active Photonic Platforms 2022, PC1219606 (13 October 2022); https://doi.org/10.1117/12.2632201
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Mashnoon A. Sakib, Romil Audhkhasi, Michelle L. Povinelli, "Graphene-based metamaterial for on-demand spectral shaping in the mid-infrared (Conference Presentation)," Proc. SPIE PC12196, Active Photonic Platforms 2022, PC1219606 (13 October 2022); https://doi.org/10.1117/12.2632201