Analysis of surface emitting distributed-feedback quantum cascade laser based on a surface-plasmon waveguide  

作　　者：郭万红 陆全勇 刘俊岐 张伟 江宇超 李路 王利军 刘峰奇 王占国 

机构地区：[1]Key Laboratory of Semiconductor Materials Science,Institute of Semiconductors,Chinese Academy of Sciences

出　　处：《Journal of Semiconductors》2010年第11期62-66,共5页半导体学报（英文版）

基　　金：Project supported by the National Science Fund for Distinguished Young Scholars of China(No.60525406);the National Natural Science Foundation of China(Nos.60736031,60806018,60906026);the National Basic Research Program of China(No.2006CB604903);the National High Technology Research and Development Program of China(Nos.2007AA03Z446,2009AA03Z403)

摘　　要：An analysis of a surface emitting distributed-feedback quantum cascade laser（DFB QCL） based on a surface-plasmon waveguide is presented.The second-order grating realized by the sole patterning of the top metal provides strong feedback.The analysis is based on a coupled-mode theory derived from exact Floquet-Bloch solutions of the infinite periodic structure.The surface outcoupling efficiency and threshold gain for the optimized device design are 43%and 12 cm-1,respectively,which represent great improvements on the conventional dielectric waveguide based DFB QCL with typical values of 17.5%and 20 cm-1.An analysis of a surface emitting distributed-feedback quantum cascade laser（DFB QCL） based on a surface-plasmon waveguide is presented.The second-order grating realized by the sole patterning of the top metal provides strong feedback.The analysis is based on a coupled-mode theory derived from exact Floquet-Bloch solutions of the infinite periodic structure.The surface outcoupling efficiency and threshold gain for the optimized device design are 43%and 12 cm-1,respectively,which represent great improvements on the conventional dielectric waveguide based DFB QCL with typical values of 17.5%and 20 cm-1.

关 键 词：quantum cascade laser distributed feedback lasers surface plasmon waveguide surface emission 

分 类 号：TN248[电子电信—物理电子学] TN814