Development of simple single photon source and its application to quantum state manipulation

我们构造了一个比传统单光子源简单得多、便宜得多的单光子源。半导体纳米颗粒嵌入聚合物薄膜中，其中一个颗粒被激光辐射照射。由于纳米颗粒中的量子限制效应，单个纳米颗粒不能同时发射多个光子，即该系统可以作为单光子源工作。我们在单模光纤中获得了每秒一万多个光子，并证实了它的反聚束特性，这是单光子源的明显证据。

We constituted a much more simple and inexpensive single photon source than conventional ones. Semiconductor nanoparticles are embedded in a thin film of polymer and one of those particles are illuminated by a laser radiation. Because of the quantum confinement effect in nanoparticles, a single nanoparticle cannot emit multiple photons at one time, i.e. this system can work as a single photon source. We have obtained more than 10 thousand photons per second in a single mode fiber and confirmed the antibunching property, which is the clear evidence for a single photon source.