title: Analysis of an electro-optic modulator based on a graphene-silicon hybrid 1D photonic crystal nanobeam cavity.
abstract: We propose and numerically study an on-chip graphene-silicon hybrid electro-optic (EO) modulator operating at the telecommunication band, which is implemented by a compact 1D photonic crystal nanobeam (PCN) cavity coupled to a bus waveguide with a graphene sheet on top. Through electrically tuning the Fermi level of the graphene, both the quality factor and the resonance wavelength can be significantly changed, thus the in-plane lightwave can be efficiently modulated. Based on finite-difference time-domain (FDTD) simulation results, the proposed modulator can provide a large free spectral range (FSR) of 125.6 nm, a high modulation speed of 133 GHz, and a large modulation depth of ~12.5 dB in a small modal volume, promising a high performance EO modulator for wavelength-division multiplexed (WDM) optical communication systems.
authors.forename: Ting
authors.initials: T
authors.lastname: Pan
authors.forename: Ciyuan
authors.initials: C
authors.lastname: Qiu
authors.forename: Jiayang
authors.initials: J
authors.lastname: Wu
authors.forename: Xinhong
authors.initials: X
authors.lastname: Jiang
authors.forename: Boyu
authors.initials: B
authors.lastname: Liu
authors.forename: Yuxing
authors.initials: Y
authors.lastname: Yang
authors.forename: Huanying
authors.initials: H
authors.lastname: Zhou
authors.forename: Richard
authors.initials: R
authors.lastname: Soref
authors.forename: Yikai
authors.initials: Y
authors.lastname: Su