Wang Hui, Duan Z-C, Li Y-H, Chen Si, Li J-P, He Y-M, Chen M-C, He Yu, Ding X, Peng Cheng-Zhi, Schneider Christian, Kamp Martin, Höfling Sven, Lu Chao-Yang, Pan Jian-Wei
Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China.
CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
Phys Rev Lett. 2016 May 27;116(21):213601. doi: 10.1103/PhysRevLett.116.213601.
By pulsed s-shell resonant excitation of a single quantum dot-micropillar system, we generate long streams of 1000 near-transform-limited single photons with high mutual indistinguishability. The Hong-Ou-Mandel interference of two photons is measured as a function of their emission time separation varying from 13 ns to 14.7 μs, where the visibility slightly drops from 95.9(2)% to a plateau of 92.1(5)% through a slow dephasing process occurring at a time scale of 0.7 μs. A temporal and spectral analysis reveals the pulsed resonance fluorescence single photons are close to the transform limit, which are readily useful for multiphoton entanglement and interferometry experiments.
通过对单个量子点-微柱系统进行脉冲s壳层共振激发，我们产生了1000个具有高度相互不可区分性的近变换极限单光子的长流。测量了两个光子的Hong-Ou-Mandel干涉作为它们发射时间间隔从13纳秒到14.7微秒变化的函数，其中通过在0.7微秒时间尺度上发生的缓慢退相过程，可见度从95.9(2)%略微下降到92.1(5)%的平台期。时间和光谱分析表明，脉冲共振荧光单光子接近变换极限，这对于多光子纠缠和干涉测量实验很有用。
