Quantum interference of multimode two-photon pairs with a Michelson interferometer

TL;DR

This paper demonstrates the experimental observation of two-photon interference in multimode photon pairs using a Michelson interferometer, revealing dependence on path difference and phase in unbalanced cases, with results matching theoretical predictions.

Contribution

First experimental demonstration of multimode two-photon interference with a Michelson interferometer, highlighting the effects of path difference and phase on correlation functions.

Findings

Correlation depends on path difference and phase in unbalanced interferometer

Correlation shape is independent of small path difference in balanced case

Experimental results agree with theoretical predictions

Abstract

We experimentally observe the two-photon interference of multimode photon pairs produced by an optical parametric oscillator far below threshold via a michelson interferometer, which shows a multipeaked structure. We find that the correlation function when the interferometer is unbalanced is clearly dependent on the path difference and phase between two interfering beams, but the shape of correlation function in balanced case is independent on the small path difference and phase beside the height. All experimental results are well agreed with the theoretical prediction.