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

Nanophotonics

卷:9

Galili Michael¹  Frandsen Lars Hagedorn¹  Xiao Sanshui¹  Zhu Xiaolong¹  Ding Yunhong¹  Oxenløwe Leif Katsuo¹  Hu Hao¹  Zhang Xinliang²  Cheng Zhao²  Dong Jianji² 

[1] Department of Photonics Engineering, Technical University of Denmark, DK-2800Kongens Lyngby, Denmark;

[2] Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 430074Wuhan, China;

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

DOI  :  10.1515/nanoph-2019-0381

来源: DOAJ

【 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】

Unknown