Liu Xinghua, Li Tian, Wang Jiaxuan, Kamble Mrunal R, Zheltikov Aleksei M, Agarwal Girish S
Opt Express. 2022 Dec 19;30(26):47463-47474. doi: 10.1364/OE.480300.
We demonstrate how the Hong-Ou-Mandel (HOM) interference with polarization-entangled photons can be used to probe ultrafast dephasing. We can infer the optical properties like the real and imaginary parts of the complex susceptibility of the medium from changes in the position and the shape of the HOM dip. From the shift of the HOM dip, we are able to measure 22 fs dephasing time using a continuous-wave (CW) laser even with optical loss > 97 %, while the HOM dip visibility is maintained at 92.3 % (which can be as high as 96.7 %). The experimental observations, which are explained in terms of a rigorous theoretical model, demonstrate the utility of HOM interference in probing ultrafast dephasing.
我们展示了如何利用极化纠缠光子的洪-欧-曼德尔（HOM）干涉来探测超快退相。我们可以从HOM凹陷的位置和形状变化推断出介质复极化率的实部和虚部等光学性质。通过HOM凹陷的移动，即使在光学损耗>97%的情况下，我们也能够使用连续波（CW）激光测量22飞秒的退相时间，同时HOM凹陷的可见度保持在92.3%（可高达96.7%）。这些实验观测结果，通过一个严格的理论模型进行了解释，证明了HOM干涉在探测超快退相方面的实用性。
