Design and Optimization of a Graphene Modulator Based on Hybrid Plasmonic Waveguide with Double Low-Index Slots

被引：12

作者：

Luan, Jinyu ^{[1
]}

Fan, Meiyong ^{[1
]}

Zheng, Pengfei ^{[1
]}

Yang, Huimin ^{[1
]}

Hu, Guohua ^{[1
]}

Yun, Binfeng ^{[1
]}

Cui, Yiping ^{[1
]}

机构：

[1] Southeast Univ, Adv Photon Ctr, Nanjing 210096, Jiangsu, Peoples R China

来源：

PLASMONICS | 2019年 / 14卷 / 01期

基金：

美国国家科学基金会;

关键词：

Graphene; Hybrid; Plasmonic waveguide; Modulator;

D O I：

10.1007/s11468-018-0785-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Graphene modulators based on surface plasmonic waveguides enable a strong interaction between light and graphene because great electric field enhancement occurs in the sub-wavelength region. However, a tight field confinement will cause a large metal absorption of light. Thus, graphene modulator base on hybrid plasmonic waveguide has a tradeoff between the propagation loss and the modulation depth. Here, we achieved a good balance between them by designing and optimizing an electro-optic modulator based on hybrid plasmonic waveguide with four graphene layers. The structure of the waveguide is metal/insulator/Si/insulator/metal. The modulation depth and the propagation loss of the modulator are 0.524 and 0.05dB/m respectively, which make a relatively high figure of merit about 10.5. Also the obtained modulation bandwidth and power consumption are 150GHz and 0.607pJ/bit, respectively.

引用

页码：133 / 138

页数：6

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