发表机构
Centre Énergie, Matériaux & Télécommunications, Institut National de la Recherche Scientifique（能源、材料与电信中心，国家科学研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文通过定制泵浦场，理论并实验证明泵浦奇偶性影响HOM干涉的相消-相长转变，并在HG和LG模式下分别实现灵敏度增强和角分辨率整数倍提升，为旋转传感提供新途径。
AI 中文摘要
一对光子进入Hong-Ou-Mandel干涉仪时，根据其在测量自由度上态的对称性，会发生聚束或反聚束，从而产生相长或相消干涉。对于通过自发参量下转换产生的光子对，这种对称性可以通过对光子对施加线性变换和投影，或通过定制泵浦场来工程化。在此，我们采用后一种方法，证明泵浦的奇偶性影响从相长干涉到相消干涉的转变的形状和频率。我们使用编码在Hermite-Gaussian和Laguerre-Gaussian基中的旋转结构泵浦模式，在理论和实验上证明了这一概念。在前一种情况下，我们展示了该转变展现出该模式族特有的丰富结构，随着模式阶数的增加，灵敏度增强。在后一种情况下，我们证明了，与NOON态一样，角分辨率存在整数倍增强，增强因子与轨道角动量含量成正比，从而开启了Hong-Ou-Mandel增强旋转传感的可能性。
英文摘要
A pair of photons entering a Hong-Ou-Mandel interferometer will bunch or anti-bunch depending on the symmetry of their state in the measured degree of freedom, resulting in constructive or destructive interference. For photon pairs generated through spontaneous parametric down-conversion, this symmetry can be engineered through linear transformations and projections applied to the photon pairs, or by tailoring the pump field. Here, we adopt the latter approach to demonstrate that the pump's parity affects the shape and frequency of the transition from constructive to destructive interference. We demonstrate this concept theoretically and experimentally using a rotating structured pump mode encoded in the Hermite-Gaussian and Laguerre-Gaussian bases. In the former case, we show that the transition exhibits a rich structure unique to the mode family, resulting in enhanced sensitivity as the mode order increases. In the latter case, we demonstrate, as with NOON states, an integer enhancement in angular resolution by a factor proportional to the orbital angular momentum content, thereby opening the possibility of Hong-Ou-Mandel-enhanced rotation sensing.
Comments7 pages, 6 figures
