Significantly High Modulation Efficiency of Compact Graphene Modulator Based on Silicon Waveguide

被引：52
|
作者：
Shu, Haowen [1 ]
Su, Zhaotang [1 ]
Huang, Le [2 ]
Wu, Zhennan [1 ]
Wang, Xingjun [1 ]
Zhang, Zhiyong [2 ]
Zhou, Zhiping [1 ]
机构：
[1] Peking Univ, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China
[2] Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China
来源：
SCIENTIFIC REPORTS | 2018年 / 8卷
基金：
中国国家自然科学基金;
关键词：
MACH-ZEHNDER MODULATOR; OPTICAL MODULATOR; HIGH-SPEED;
D O I：
10.1038/s41598-018-19171-x
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We theoretically and experimentally demonstrate a significantly large modulation efficiency of a compact graphene modulator based on a silicon waveguide using the electro refractive effect of graphene. The modulation modes of electro-absorption and electro-refractive can be switched with different applied voltages. A high extinction ratio of 25 dB is achieved in the electro-absorption modulation mode with a driving voltage range of 0 V to 1 V. For electro-refractive modulation, the driving voltage ranges from 1 V to 3 V with a 185-pm spectrum shift. The modulation efficiency of 1.29 V . mm with a 40-mu m interaction length is two orders of magnitude higher than that of the first reported graphene phase modulator. The realisation of phase and intensity modulation with graphene based on a silicon waveguide heralds its potential application in optical communication and optical interconnection systems.
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页数：8
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