Electro-absorption optical modulator using dual-graphene-on-graphene configuration | Zendy

Shengwei Ye | Zendy; Zi Shuai Wang | Zendy; Linfeng Tang | Zendy; Yali Zhang | Zendy; Rongguo Lu | Zendy; Yong Liu | Zendy

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Electro-absorption optical modulator using dual-graphene-on-graphene configuration

Author(s) -

Shengwei Ye,

Zi Shuai Wang,

Linfeng Tang,

Yali Zhang,

Rongguo Lu,

Yong Liu

Publication year - 2014

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.026173

Subject(s) - graphene , materials science , optical modulator , optoelectronics , silicon on insulator , extinction ratio , graphene nanoribbons , waveguide , optics , absorption (acoustics) , modulation (music) , electrode , silicon , nanotechnology , phase modulation , physics , wavelength , quantum mechanics , phase noise , acoustics , composite material

An electro-absorption optical modulator based on dual-graphene-on-graphene configuration is presented and investigated. Four graphene layers are embedded in a silicon-on-insulator (SOI) waveguide, the total metal-graphene contact resistance of this structure is reduced 50% by the graphene layers co-electrode design. By optimizing the position of each graphene-on-graphene (GOG) layer in the waveguide, a strong interaction between graphene layers and light is obtained, which leads to a significant change of the effective mode index (EMI) in the waveguide. Calculations show that an electro-absorption optical modulator can achieve 34 dB extinction ratio (ER) and 100 GHz modulation bandwidth with 5 µm-long active region and 17.6 fJ/bit consumption.

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