title: Reconfigurable and tunable flat graphene photonic crystal circuits.
abstract: Photonic crystal waveguides and circuits are one of the basic modules for integrated photonic devices. They mainly rely on photonic bandgaps to achieve light confinement and manipulation. Herein, we propose a novel general principle or method to achieve reconfigurable and tunable flat graphene photonic crystals (FG-PCs) by selectively electrostatic gating a layer of graphene with periodic gold electrodes. The tunable flat photonic bandgap structure of the FG-PCs as a function of the Fermi level is investigated. Reconfigurable FG-PC defect waveguides and cavities created by external patterned-gate-voltage control are also proposed and discussed. The features of reconfigurable/tunable FG-PCs will add more flexibility and capabilities for the single chip integration of graphene-based integrated photonic devices.
authors.affiliation: Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Special Functional Fiber Engineering Technology Research Center of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China. huangxg@scnu.edu.cn.
authors.forename: Zan Hui
authors.initials: ZH
authors.lastname: Chen
authors.forename: Qi Long
authors.initials: QL
authors.lastname: Tan
authors.forename: Jieer
authors.initials: J
authors.lastname: Lao
authors.forename: Yao
authors.initials: Y
authors.lastname: Liang
authors.forename: Xu Guang
authors.initials: XG
authors.lastname: Huang