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 ...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.展开更多
基金The National Natural Science Foundation of China(No.50902042)the Natural Science Foundation of Hebei Province,China(Nos.A2014201035,E2014201037)the Education Office Research Foundation of Hebei Province,China(Nos.ZD2014036,QN2014085)
基金supported by the National Natural Science Foundation of China(No.61001018)the Natural Science Foundation of Shandong Province of China(No.ZR2012FM011)+3 种基金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)
文摘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.
