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arXiv 1202.4791physics.opticscond-mat.mes-hall
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高速波导耦合石墨烯-石墨烯光学调制器

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

Steven J. Koester, Mo Li

摘要:

提出了一种基于双石墨烯层的电吸收光调制器概念。该器件由绝缘体上硅波导组成,两个石墨烯层位于其上,由薄绝缘区域隔开。下层石墨烯充当可调谐吸收体,而上层充当透明栅电极。基于实际石墨烯材料特性的计算表明,在近红外波段(λ=1.55 μm)和中红外波段(λ=3.5μ m),超过100 GHz(30 GHz)的3 dB带宽是可能的。还量化了背景掺杂和电势波动对带宽、调制深度和插入损耗的影响。

英文摘要:

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 100 GHz (30 GHz) are possible at near- (λ=1.55 μm) and mid- (λ=3.5μm) infrared bands. The effect of background doping and potential fluctuations on the bandwidth, modulation depth and insertion loss are also quantified.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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