Double-layer graphene on photonic crystal waveguide electro-absorption modulator with 12 GHz bandwidth

Nanophotonics

article

Zhao Cheng¹  Leif Katsuo Oxenløwe²  Xinliang Zhang¹  Xiaolong Zhu²  Michael Galili²  Lars Hagedorn Frandsen²  Hao Hu²  Sanshui Xiao²  Jianji Dong¹  Yunhong Ding² 

[1] Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology;Department of Photonics Engineering, Technical University of Denmark;Center for Nanostructured Graphene, Technical University of Denmark

关键词: photonic crystal waveguides;    graphene;    modulators;    electro-optical devices;   

DOI  :  10.1515/nanoph-2019-0381

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Graphene has been widely used in silicon-based optical modulators for its ultra-broadband light absorption and ultrafast optoelectronic response. By incorporating graphene and slow-light silicon photonic crystal waveguide (PhCW), here we propose and experimentally demonstrate a unique double-layer graphene electro-absorption modulator in telecommunication applications. The modulator exhibits a modulation depth of 0.5 dB/μm with a bandwidth of 13.6 GHz, while graphene coverage length is only 1.2 μm in simulations. We also fabricated the graphene modulator on silicon platform, and the device achieved a modulation bandwidth at 12 GHz. The proposed graphene-PhCW modulator may have potentials in the applications of on-chip interconnections.

【 授权许可】

CC BY