Tunable midinfrared wavelength selective structures based on resonator with antisymmetric parallel graphene pair

Somayyeh Asgari; Alireza Dolatabady; Nosrat Granpayeh

doi:10.1117/1.OE.56.6.067102

2 June 2017 Tunable midinfrared wavelength selective structures based on resonator with antisymmetric parallel graphene pair

Somayyeh Asgari, Alireza Dolatabady, Nosrat Granpayeh

Author Affiliations +

Optical Engineering, Vol. 56, Issue 6, 067102 (June 2017). https://doi.org/10.1117/1.OE.56.6.067102

Abstract

A parallel graphene layer pair arranged in an antisymmetric configuration coupled through a cavity resonator is proposed and analyzed by the analytical method and the numerical finite-difference time-domain method. The structure operates as a bandpass filter in the midinfrared region. The feature, as the result of the wavelength selective property of the cavity resonator, can be tuned by varying the length of the resonator, the lateral coupling distance between the graphene layers, the dielectric refractive index of material inside the resonator, and, the most interesting, the chemical potential of the graphene layers. The proposed structure can be promoted to power splitters and refractive index sensors by proper designs. Various power division ratios can be realized by changing the relative positions and/or the chemical potentials of the output waveguides. The investigated components can be utilized in the design of midinfrared nanoscale photonic integrated circuits.

© The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

Citation Download Citation

Somayyeh Asgari, Alireza Dolatabady, and Nosrat Granpayeh "Tunable midinfrared wavelength selective structures based on resonator with antisymmetric parallel graphene pair," Optical Engineering 56(6), 067102 (2 June 2017). https://doi.org/10.1117/1.OE.56.6.067102

Received: 3 March 2017; Accepted: 9 May 2017; Published: 2 June 2017

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