High-speed waveguide-coupled graphene-on-graphene optical modulators

被引：147

作者：

Koester, Steven J. ^{[1
]}

Li, Mo ^{[1
]}

机构：

[1] Univ Minnesota Twin Cities, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 17期

关键词：

FILMS;

D O I：

10.1063/1.4704663

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An electro-absorption optical modulator concept based upon a dual-graphene layer is presented. The device consists of a silicon-on-insulator waveguide upon which two graphene layers reside, separated by a thin insulating region. The lower graphene acts as a tunable absorber, while the upper layer functions as a transparent gate electrode. Calculations based upon realistic graphene material properties show that 3-dB bandwidths over 120 GHz (30 GHz) are achievable at near- (lambda = 1.55 mu m) and mid- (lambda = 3.5 mu m) infrared bands. The effect of background doping and potential fluctuations on the bandwidth, modulation depth, and insertion loss are also quantified. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4704663]

引用

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