Three-Dimensional Analysis of an Ultrashort Optical Cross-Bar Switch Based on a Graphene Plasmonic Coupler

被引：40

作者：

Bahadori-Haghighi, Shahram ^{[1
]}

Ghayour, Rahim ^{[1
]}

Sheikhi, Mohammad Hossein ^{[1
]}

机构：

[1] Shiraz Univ, Dept Commun & Elect Engn, Shiraz 713451457, Iran

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2017年 / 35卷 / 11期

基金：

美国国家科学基金会;

关键词：

Cross-bar switch; directional coupler; graphene plasmonics; surface plasmon polariton; INDIUM TIN OXIDE; WAVE-GUIDES; CONTACT RESISTANCE; GENERATION; MODULATORS; NANOLAYERS; RANGE;

D O I：

10.1109/JLT.2017.2688354

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A high-performance electro-optical cross-bar switch based on a vertical graphene plasmonic directional coupler is proposed. The structure consists of two pattern-free graphene plasmonic waveguides which have major advantages over their previous counterparts. An ultrashort switching length of just 223 nm is obtained at the frequency of 37.5 THz. To the best of our knowledge, this switching length is remarkably shorter than those in the recently reported structures. Our designed structure is simulated using a three-dimensional finite-difference time-domain method. According to the illustrated results, extinction ratios of 10.5 and 9.52 dB are obtained at the cross and bar ports, respectively, and a wide spectral width of more than 1 mu m is presented. The required switching voltage is also calculated as 6 V and a very high 3 dB bandwidth of more than 60 GHz is obtained. An extremely low switching energy of 3.8 fJ/bit is also estimated.

引用

页码：2211 / 2217

页数：7

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