Electro-absorption optical modulator using dual-graphene-on-graphene configuration.
An electro-absorption optical modulator based on dual-graphene-on-graphene configuration is presented and investigated. Four graphene layers are embedded in a silicon-on-insulator (SOI) waveguide, the total metal-graphene contact resistance of this structure is reduced 50% by the graphene layers co-electrode design. By optimizing the position of each graphene-on-graphene (GOG) layer in the waveguide, a strong interaction between graphene layers and light is obtained, which leads to a significant change of the effective mode index (EMI) in the waveguide. Calculations show that an electro-absorption optical modulator can achieve 34 dB extinction ratio (ER) and 100 GHz modulation bandwidth with 5 µm-long active region and 17.6 fJ/bit consumption.
Shengwei
S
Ye
Zishuai
Z
Wang
Linfeng
L
Tang
Yali
Y
Zhang
Rongguo
R
Lu
Yong
Y
Liu
D065638:Absorption, Radiation; D017076:Computer-Aided Design; D004566:Electrodes; D004867:Equipment Design; D006108:Graphite / Q000737:chemistry*; D008027:Light; D055096:Optical Devices; D013685:Telecommunications / Q000295:instrumentation*
D006108:Graphite