Graphene-based fine tuning of the Fano resonance transmission of quasi-bound states in the continuum

Posted on 05.08.2022 - 14:41
Quasi-bound state in the continuum (BIC) has significant potential because it supports an ultra-high quality factor (Q-factor). Here, we propose a graphene-embedded one-dimensional photonic crystal that supports quasi-BIC for tuning very sharp Fano resonance transmission. The strongly enhanced light-graphene interaction from the quasi-BIC enables fine variation of the transmission at the resonant wavelength. The Q-factor of quasi-BIC significantly decreases because of the loss due to graphene conductivity. We also propose a low-energy consumption THz-wave modulator using this scheme. The designed modulator shows approximately 100% modulation depth with a Fermi level shift of only EF = 90 meV.

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Kim, Myunghwan; Kee, Chul-Sik; Kim, Soan (2022): Graphene-based fine tuning of the Fano resonance transmission of quasi-bound states in the continuum. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.6121332.v2
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