Gain enhancement of terahertz surface plasmon in electrically pumped multilayer graphene

We propose a surface plasmon（SP） structure in electrically pumped multiple graphene-layer（MGL）, and calculate the functions of dynamic conductivity and absorption coefficient. Meanwhile, the dependences of absorption coefficient on different factors are simulated. SP can get gain when absorption coe...

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Published in:Optoelectronics letters 2015, Vol.11 (1), p.49-52
Main Author: 张玉萍 刘亚青 曹妍妍 李彤彤 吕欢欢 黄晓燕 任广军 张会云
Format: Article
Language:English
Subjects:
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
吸收系数
太赫兹
松驰时间
电泵浦
石墨
等离子体装置
表面等离子体
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description We propose a surface plasmon（SP） structure in electrically pumped multiple graphene-layer（MGL）, and calculate the functions of dynamic conductivity and absorption coefficient. Meanwhile, the dependences of absorption coefficient on different factors are simulated. SP can get gain when absorption coefficient is negative, and the SP gain can be enhanced by lowering temperature, applying high bias voltage and choosing the graphene with proper layer number and long momentum relaxation time. The study on SP gain is hopeful to be used in amplifiers and graphene-based plasmon devices.
doi_str_mv 10.1007/s11801-015-4201-4
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subjects Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
吸收系数
太赫兹
松驰时间
电泵浦
石墨
等离子体装置
表面等离子体
title Gain enhancement of terahertz surface plasmon in electrically pumped multilayer graphene
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