title: Ultracompact optical modulator based on graphene-silica metamaterial.
abstract: We present an ultracompact electro-optic modulator with a length of 15 nm by utilizing a permittivity-tunable metamaterial channel, which is composed of alternative layers of graphene and silica. Optical waves can propagate through the metamaterial channel only if its permittivity is tuned to be near zero. The finite-difference time-domain (FDTD) simulations show the insertion loss is roughly -0.27  dB while the 3 dB extinction ratio is obtained with a 0.8 V gate voltage. The device's footprint is as small as 0.01 μm2. This modulator consumes low power and can potentially be ultrafast.
authors.forename: Longzhi
authors.initials: L
authors.lastname: Yang
authors.forename: Ting
authors.initials: T
authors.lastname: Hu
authors.forename: Ao
authors.initials: A
authors.lastname: Shen
authors.forename: Chongyang
authors.initials: C
authors.lastname: Pei
authors.forename: Bing
authors.initials: B
authors.lastname: Yang
authors.forename: Tingge
authors.initials: T
authors.lastname: Dai
authors.forename: Hui
authors.initials: H
authors.lastname: Yu
authors.forename: Yubo
authors.initials: Y
authors.lastname: Li
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Jiang
authors.forename: Jianyi
authors.initials: J
authors.lastname: Yang