论文标题
使用单个常规检测器观察光子抗启动
Observation of photon antibunching with a single conventional detector
论文作者
论文摘要
二阶光子相关函数在量子光学元件中非常重要，该量子通常用汉伯里棕色和Twiss干涉仪测量，该干涉仪采用了一对单光子检测器和双通道时间获取模块。在这里，我们演示了一种新方法，用于测量和提取具有标准的单光雪崩光电二极管（Dead Time = 22 ns）和单渠道时间采集模块的二阶相关函数。这是通过将零时间延迟接近的信息巧合计数转移到一个时间窗口的情况下实现的，而该时间窗口未被杀死时间和后期检测系统所消除的时间窗口。通过测量单个胶体纳米晶体的二阶相关性来验证新方案。明确观察到光子抗启动，并且与使用标准HBT设置测量的结果非常吻合。我们的计划简化了高阶相关技术，在成本敏感的情况下可能会受到青睐。
The second-order photon correlation function is of great importance in quantum optics which is typically measured with the Hanbury Brown and Twiss interferometer which employs a pair of single-photon detectors and a dual-channel time acquisition module. Here we demonstrate a new method to measure and extract the second-order correlation function with a standard single-photon avalanche photodiode (dead-time = 22 ns) and a single-channel time acquisition module. This is realized by shifting the informative coincidence counts near the zero-time delay to a time window which is not obliterated by the dead-time and after-pulse of detection system. The new scheme is verified by measuring the second-order correlation from a single colloidal nanocrystal. Photon antibunching is unambiguously observed and agrees well with the result measured using the standard HBT setup. Our scheme simplifies the higher-order correlation technique and might be favored in cost-sensitive circumstances.
