论文标题
用量子点与微孔子耦合的量子点取消反复的单光子源
Demultiplexed Single-Photon Source with a Quantum Dot Coupled to Microresonator
论文作者
论文摘要
基于半导体量子点的单光子发射器的特性，例如它们的不可区分性和亮度，取决于重组通道的稳定性，这可以自发地在激子和TRION之间自发切换。我们表明，可以通过仔细控制放置在带有分布式bragg反射器的柱状微腔中的外延INAS/GAAS量子点附近的掺杂分布来实现通过中性激子状态的显性重组。在制造的设备中进行的洪 - 曼德尔实验表明，在单模光纤内，在242 ns内连续发射的单光子的连续发射单光子的连续发射的程度不可分性。所达到的亮度使得在六个独立的空间模式下实现光子的时空消退，其纤维内生成频率超过0.1 Hz。
The characteristics of a single-photon emitter based on a semiconductor quantum dot, such as their indistinguishability and brightness, depend on the stability of the recombination channel, which can switch spontaneously between exciton and trion. We show that dominant recombination through neutral exciton states can be achieved by careful control of the doping profile near an epitaxial InAs/GaAs quantum dot placed in a columnar microcavity with distributed Bragg reflectors. The Hong-Ou-Mandel experiments carried out in the fabricated device demonstrate the degree of indistinguishability of 91% of successively emitted single photons within 242 ns at an efficiency of 10% inside a single-mode optical fiber. The achieved brightness made it possible to implement spatio-temporal demultiplexing of photons in six independent spatial modes with an in-fiber generation frequency of more than 0.1 Hz.
