Design of graphene-based polarization-insensitive optical modulator

Nanophotonics

article

Xiao Hu¹  Jian Wang¹ 

[1] Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology

关键词: graphene;    modulators;    optical devices;    waveguides;   

DOI  :  10.1515/nanoph-2017-0088

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

By exploiting the electroabsorption effect of graphene, we present a graphene-based polarization-insensitive optical modulator. The waveguide structure consists of a silica substrate, high-index silicon strip waveguide, Si 3 N 4 dielectric spacer, two graphene layers, and two metal electrodes. The modulator performance is comprehensively studied in terms of attenuation, insertion loss, modulation depth, and bandwidth. We achieve broadband >16 dB attenuation graphene-based optical modulator over a 35 nm wavelength range (covering C band) with an imbalance of no >1 dB and insertion loss of <2 dB for transverse magnetic and transverse electric polarized modes. Moreover, the electrical properties such as energy per bit consumption ( E bit ) are also studied.

【 授权许可】

CC BY