Single semiconductor quantum dots have been extensively used to demonstrate the deterministic emission of high purity single photons. The single photon emission performance of these nanostructures has become very well controlled, offering high levels of photon indistinguishability and brightness. Ultimately, quantum technologies will require the development of a set of devices to manipulate and control the state of the photons. Here we measure and simulate a novel all-optical route to switch the single photon stream emitted from the excitonic transition in a single semiconductor quantum dot. A dual non-resonant excitation pumping scheme is used to engineer a switching device operated with GHz speeds, high differential contrasts, ultra-low power consumption and high single photon purity. Our device scheme can be replicated in many different zero dimensional semiconductors, providing a novel route towards developing a platform-independent on-chip design for high speed and low power consumption quantum devices.

单半导体量子点已被广泛用于证明高纯度单光子的确定性发射。这些纳米结构的单光子发射性能已经得到很好的控制，从而提供了高水平的光子不可分辨性和亮度。最终，量子技术将需要开发一套设备来操纵和控制光子的状态。在这里，我们测量并模拟了一种新颖的全光路径，以切换从激子跃迁发射的单个光子流到单个半导体量子点中。双非谐振激励泵浦方案用于设计以GHz速度，高差分对比度，超低功耗和高单光子纯度运行的开关设备。