A nonlinear optical interferometer based on crystal superlattices has been demonstrated for the first time in a cascade of up to five crystals. The enhanced sensitivity due to quantum interference and correlations makes it a promising tool for sensing, imaging, and spectroscopy.

中文翻译：

---

具有相关光子的非线性干涉仪：面向量子光光谱和成像。

首次在多达五个晶体的级联中演示了基于晶体超晶格的非线性光学干涉仪。由于量子干涉和相关性而增强的灵敏度使其成为传感、成像和光谱学的有前途的工具。