Appl Opt. 2023 Apr 20;62(12):3093-3099. doi: 10.1364/AO.487084.
Quantum ghost imaging (QGI) is an intriguing imaging protocol that exploits photon-pair correlations stemming from spontaneous parametric down-conversion (SPDC). QGI retrieves images from two-path joint measurements, where single-path detection does not allow us to reconstruct the target image. Here we report on a QGI implementation exploiting a two-dimensional (2D) single-photon avalanche diode (SPAD) array detector for the spatially resolving path. Moreover, the employment of non-degenerate SPDC allows us to investigate samples at infrared wavelengths without the need for short-wave infrared (SWIR) cameras, while the spatial detection can be still performed in the visible region, where the more advanced silicon-based technology can be exploited. Our findings advance QGI schemes towards practical applications.
量子鬼成像（QGI）是一种引人入胜的成像协议，它利用了源于自发参量下转换（SPDC）的光子对相关性。QGI 可以从双路联合测量中获取图像，而单路探测则不允许我们重建目标图像。在这里，我们报告了一种利用二维（2D）单光子雪崩二极管（SPAD）阵列探测器进行空间分辨路径的 QGI 实现。此外，非简并 SPDC 的应用允许我们在不需要短波红外（SWIR）相机的情况下研究红外波长的样品，而空间探测仍然可以在可见区域进行，在可见区域可以利用更先进的基于硅的技术。我们的发现推动了 QGI 方案向实际应用的发展。
