多量子阱结构中热载流子弛豫过程中的非平衡声子效应

NONEQUILIBRIUM PHONON EFFECTS IN HOT CARRIER RELAXATION PROCESSES OF MULTIPLE QUANTUM WELL STRUCTURES

在多量子阱结构中的热载流子弛豫过程中考虑非平衡声子的存在,在求解载流子能量损失率方程中同时计入声子的发射和吸收,并联立解出非平衡声子的波耳兹曼方程,从而证明,在稳态和准平衡态条件下,由载流子能量损失率方程解出的弛豫时间τ_(avg),实际上是电子-声子散射时间常数与非平衡声子寿命之和,而不是以往所认为的仅为电子-声子散射时间常数。

Considering the phonon absorption and the phonon emission, we solve the equation for average energy loss rate of carriers and the hot phonon Boltzmann equation. We find that τ_(avg) is a sum of the electron phonon interaction time constant and the nonequilibrium phonon. decay time.