24 August 2017 Optically tunable Fano-resonant filter based on graphene
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Abstract
We propose a high-Q optically tunable terahertz (THz) filter consisting of subwavelength multilayer graphene/ dielectric/metal asymmetric square split-ring resonators (SRR) within a unit cell. The obtained simulation results demonstrate that Fano resonance can be efficiently modulated under IR-radiation of different intensity value. The modulation depth of Fano resonance can achieve about 60% under the maximum considered pumping intensity (corresponding to 0.4 eV of Fermi energy) with the Q-factor of about 135. The proposed metasurface provides narrow filtering of incident light as well as sensing applications.
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Alexander N. Grebenchukov, Alexander N. Grebenchukov, Anton D. Zaitsev, Anton D. Zaitsev, Mikhail M. Novoselov, Mikhail M. Novoselov, Egor V. Kornilov, Egor V. Kornilov, Mikhail K. Khodzitsky, Mikhail K. Khodzitsky, } "Optically tunable Fano-resonant filter based on graphene", Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103432V (24 August 2017); doi: 10.1117/12.2277542; https://doi.org/10.1117/12.2277542
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