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

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 a...

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Bibliographic Details
Published in:Scientific reports 2018-01, Vol.8 (1), p.991-8, Article 991
Main Authors: Shu, Haowen, Su, Zhaotang, Huang, Le, Wu, Zhennan, Wang, Xingjun, Zhang, Zhiyong, Zhou, Zhiping
Format: Article
Language:English
Subjects:
132/124
639/624/399/918/1052
639/624/399/918/1054
Absorption
Efficiency
Humanities and Social Sciences
multidisciplinary
Science
Science (multidisciplinary)
Silicon
Voltage
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Summary: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-μm 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.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-19171-x