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