纤锌矿型量子级联激光器的界面与受限声子比较(英文)

利用传输矩阵方法对纤锌矿型量子级联激光器有源区的界面与受限声子进行了研究.计算结果显示:在纵光学频域有一组界面声子与二组受限声子存在,而且最低频率的两个界面声子在一定条件下能转变为受限模式.通过比较界面声子与受限声子的色散及声子势发现两者有很大不同,且计算电声散射速率可以发现由这两种声子引起的散射率是可比拟的.

Comparison of Interface and Confined Phonons in Wurtzite Quantum Cascade Laser

The interface and confined phonon modes of the wurtzite quantum cascade laser are investigated using the transfer-matrix method.One group of interface modes and two groups of confined modes are presented in the longitudinal optical frequency domain,and the interface modes can be transited into the confined modes for two lowest frequency modes.The dispersions and electronic potentials of the interface and confined modes are obviously different,and the scattering rate induced by the confined mode is comparable to that induced by the interface mode.