Surface acoustic waves (SAWs) with a strong enough piezoelectric field can capture and transport electrons and holes. The presence of SAWs and their photo-generated carriers’ transport properties in the GaAs/AlGaAs quantum well (QW) is a potential scheme to achieve single photon sources and single photon detectors. We numerically solve the system of coupled Schrödinger and Poisson equations and the carriers’ radiative lifetime. A finite difference method of two-dimensional was developed as a conventional approach to the theoretical understanding of the presence in the QW through Python programs. The features of carriers’ radiative lifetime are discussed as functions of the SAW wavelengths and SAW amplitudes. The spatial separation and radiative lifetime extension of the electrons and holes in the SAW-driven QW was explained by the method.

中文翻译：

---

GaAs/AlGaAs量子阱中表面声波驱动载流子输运的数值分析

具有足够强压电场的表面声波（SAW）可以捕获和传输电子和空穴。GaAs/AlGaAs 量子阱 (QW) 中 SAW 的存在及其光生载流子的传输特性是实现单光子源和单光子探测器的潜在方案。我们对薛定谔和泊松耦合方程组以及载流子的辐射寿命进行数值求解。二维有限差分法被开发为通过 Python 程序从理论上理解 QW 中存在的传统方法。载流子辐射寿命的特征被讨论为SAW 波长和SAW 幅度的函数。该方法解释了SAW驱动QW中电子和空穴的空间分离和辐射寿命延长。