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通过蒙特卡洛方法研究了基于共振声子散射的太赫兹量子级联激光器中杂质散射对激光器性能的影响.使用单子带静态屏蔽模型来处理电子与杂质的散射过程.发现电子与杂质的散射为电子在有源区中的注入和抽取过程提供了另外一个通道.这一过程可以影响电子在不同子带的占据数以及器件的电流.所以,在考虑基于共振声子散射的太赫兹量子级联激光器中的电子输运过程时,需要包含电子与杂质的散射过程.
The effect of impurity scattering on the performance of the laser in THz quantum cascade lasers based on resonant phonon scattering was studied by Monte Carlo method. The scattering of electrons and impurities was found using the single-band static screening model Electrons provide another channel for the injection and extraction in the active region, which can affect the number of electrons occupied in different sub-bands and the current of the device. Therefore, considering the terahertz quantum cascade based on resonant phonon scattering The electron transport in a laser requires a scattering process that involves electrons and impurities.