Electro-optic switching based on a waveguide-ring resonator made of dielectric-loaded graphene plasmon waveguides

• DOI: 10.7567/apex.9.092001
• Publication Date: 2016-08-04T09:13:55Z
• Authors: Zhe Qi; Zhi Hong Zhu; Wei Xu; Jian Fa Zhang; Chu Cai Guo; Ken Liu; Xiao Dong Yuan; Shi Qiao Qin
• Keywords: 0103 physical sciences; 01 natural sciences

Abstract We numerically demonstrate that electro-optic switching in the mid-infrared range can be realized using a waveguide-ring resonator made of dielectric-loaded graphene plasmon waveguides (DLGPWs). The numerical results are in good agreement with the results of physical analysis. The switching mechanism is based on dynamic modification of the resonant wavelengths of the ring resonator, achieved by varying the Fermi energy of a graphene sheet. The results reveal that a switching ratio of ∼24 dB can be achieved with only a 0.01 eV change in the Fermi energy. Such electrically controlled switching operation may find use in actively tunable integrated photonic circuits.