Al composition dependency of interface phonon in the wurtzite quantum cascade laser  

作　　者：陈贵楚 范广涵 

机构地区：[1]Department of Physics,Zhaoqing University [2]Institute of Optoelectronic Material and Technology,South China Normal University

出　　处：《Optoelectronics Letters》2010年第3期199-202,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.50602018);the Cooperation Subject between Guangdong Province and Hong Kong (No. 2007A010501008)

摘　　要：The interface(IF) phonons of the wurtzite quantum cascade lasers(QCL) are investigated using the transfer-matrix method(TMM).The IF modes are presented in the longitudinal optical-phonon frequency for the Al0.2Ga0.8N/GaN and Al0.15Ga0.85N/GaN QCLs,and two IF modes can be changed into other modes if their wave numbers are less than the special values.Owing to the more dispersive properties of IF phonons with the increasing Al composition,the scattering rates in both QCLs increase with the Al composition.The interface（IF） phonons of the wurtzite quantum cascade lasers（QCL） are investigated using the transfer-matrix method（TMM）.The IF modes are presented in the longitudinal optical-phonon frequency for the Al0.2Ga0.8N/GaN and Al0.15Ga0.85N/GaN QCLs,and two IF modes can be changed into other modes if their wave numbers are less than the special values.Owing to the more dispersive properties of IF phonons with the increasing Al composition,the scattering rates in both QCLs increase with the Al composition.

关 键 词：量子级联激光器 界面声子 纤锌矿 组成 铝 转移矩阵法 光学声子 分散性能 

分 类 号：TN248[电子电信—物理电子学] O471.1[理学—半导体物理]