A computationally efficient temperature-dependent model for scattering processes in mid-infrared quantum cascade lasers is developed. In this approach, the total intersubband scattering rate is described as the product of the overlap integral for the squared moduli of the envelope functions and a form factor that depends on transition energy, temperature, and material. Both inelastic and elastic scattering processes are included in the treatment. The model is used to calculate the temperature-dependent threshold current density $ {J_{{\rm th}}}(T) $ in a 10-period strain-compensated InGaAs–InAlAs mid-infrared quantum cascade laser structure and determine the characteristic temperature $ {T_0} $ in $ {J_{{\rm th}}}(T) = {J_0}\exp {(T/{T_0})} $. The effect of doping is also modeled.

中文翻译：

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散射速率方法可有效预测中红外量子级联激光器的温度相关特性

建立了计算有效的温度相关模型，用于中红外量子级联激光器的散射过程。在这种方法中，总的子带间散射率被描述为包络函数平方模的重叠积分与取决于转换能量，温度和材料的形状因数的乘积。治疗中既包括非弹性散射过程，也包括弹性散射过程。该模型用于计算10周期应变补偿的InGaAs-InAlAs中红外量子级联激光器结构中与温度有关的阈值电流密度$ {J _ {{\ rm th}}}（T）$温度$ {T_0} $ in $ {J _ {{\ rm th}}}（T）= {J_0} \ exp {（T / {T_0}）} $。还对掺杂的效果进行了建模。