论文标题
没有光学模式乘法的光子编号分辨率
Photon number resolution without optical mode multiplication
论文作者
论文摘要
实现光子数量分辨率的常见方法依赖于快速的单光子检测器以及时间或空间模式多路复用。然而，这些方法在光子数歧视和光子检测率的效率之间遭受了固有的权衡。在这里，我们介绍了一种光子数分解检测的方法，该方法通过在分布式检测器阵列中用单个光学模式的相干吸收替换模式多路复用来克服这些局限性。分布的相干吸收可确保组成探测器之间的光完全和均匀吸收，从而实现快速有效的光子数分辨率。作为概念验证，我们考虑了具有逼真的参数的超导纳米式单光子检测器的分布式阵列的情况，并表明可以通过增加阵列中的检测器数量来实现确定性吸收和任意高光子数歧视效率。没有光学模式乘法的光子数量分辨率提供了一种简单而有效的方法，可以区分大量的On-Off检测器中的任意数量的光子，或者在较小的Mode多路复用检测器中。
Common methods to achieve photon number resolution rely on fast on-off single-photon detectors in conjunction with temporal or spatial mode multiplexing. Yet, these methods suffer from an inherent trade-off between the efficiency of photon number discrimination and photon detection rate. Here, we introduce a method of photon number resolving detection that overcomes these limitations by replacing mode multiplexing with coherent absorption of a single optical mode in a distributed detector array. Distributed coherent absorption ensures complete and uniform absorption of light among the constituent detectors, enabling fast and efficient photon number resolution. As a proof-of-concept, we consider the case of a distributed array of superconducting nanowire single-photon detectors with realistic parameters and show that deterministic absorption and arbitrarily high photon number discrimination efficiency can be achieved by increasing the number of detectors in the array. Photon number resolution without optical mode multiplication provides a simple yet effective method to discriminate an arbitrary number of photons in large arrays of on-off detectors or in smaller arrays of mode multiplexed detectors.
