Tuning of surface plasmon polaritons beat length in graphene directional couplers

被引：23
作者：
Auditore, Aldo [1 ]
de Angelis, Costantino [1 ]
Locatelli, Andrea [1 ]
Aceves, Alejandro B. [2 ]
机构：
[1] Univ Brescia, Dipartimento Ingn Informaz, I-25123 Brescia, Italy
[2] So Methodist Univ, Dept Math, Dallas, TX 75275 USA
来源：
OPTICS LETTERS | 2013年 / 38卷 / 20期
关键词：
WAVE-GUIDES; PHOTONICS; POLARIZER; MODULATOR;
D O I：
10.1364/OL.38.004228
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the tuning of the coupling of surface plasmon polaritons between two spatially separated graphene layers. We demonstrate that by slightly changing the chemical potential, a graphene coupler can switch from the bar to the cross state; as a consequence, the coupling coefficient in such structures can be easily controlled by means of an applied electrical signal. (C) 2013 Optical Society of America
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收藏
页码：4228 / 4231
页数：4
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