Gain enhancement of terahertz surface plasmon in electrically pumped multilayer graphene  

作　　者：张玉萍 刘亚青 曹妍妍 李彤彤 吕欢欢 黄晓燕 任广军 张会云 

机构地区：[1]Qingdao Key Laboratory of Terahertz Technology, College of Electronic Communication and Physics, Shandong University of Science and Technology [2]College of Electronic Information Engineering, Tianjin University of Technology

出　　处：《Optoelectronics Letters》2015年第1期49-52,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61001018);the Natural Science Foundation of Shandong Province of China(No.ZR2012FM011);the Project of Shandong Province Higher Educational Science and Technology Program(No.J11LG20);the Qingdao Science&Technology Project(No.11-2-4-4-(8)-jch);the Qingdao Economic & Technical Development Zone Science & Technology Project(No.2013-1-64);the Shandong University of Science and Technology Foundation in China(No.YC140108)

摘　　要：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.

关 键 词：resonant excitation attributed tuned doping Eu PO4 in Ca9Al validated properly 

分 类 号：O613.71[理学—无机化学]