设计了一种基于场效应晶体管的量子点场效应单光子探测器,利用二维弛豫时间的近似理论建立了二维电子气电子迁移率的散射模型,通过求解量子点场效应单光子探测器GaAs/AlxGa1-xAs二维电子气系统电子和声子相互作用的Hamiltonian函数,得到了不同温度、不同Al组分以及不同二维电子气电子面密度条件下晶格振动散射对探测器二维电子气电子迁移率的影响。仿真结果显示,提高二维电子气的电子面密度浓度和适当增大Al组分,并降低工作温度,有助于探测器获得更高的二维电子气电子迁移率。 A quantum dot field effect single-photon detector based on field-effect transistor (FET) is designed. The two-dimensional relaxation time approximation theory is used to establish the scattering model of two-dimensional electron gas and electron mobility. GaAs / AlxGa1-xAs two-dimensional electron gas system electron and phonon interactions Hamiltonian function, obtained at different temperatures, different Al components and different two-dimensional electron gas electron density under lattice vibration scattering detector two-dimensional electron Effect of gas electron mobility. The simulation results show that increasing the electron density of two-dimensional electron gas and increasing the Al composition and decreasing the operating temperature will help the detector achieve higher two-dimensional electron-gas electron mobility.