Observation of Intensity-Intensity Correlation Speckle Patterns with Thermal Light

TL;DR

This paper introduces a modified Hanbury Brown and Twiss scheme with phase conjugation to observe phase-sensitive thermal intensity correlation speckle patterns, revealing deeper thermal correlation insights and potential imaging applications.

Contribution

It presents a novel phase-sensitive thermal correlation measurement method using phase conjugation, extending traditional HBT schemes.

Findings

Demonstrates phase-sensitive thermal speckle correlations

Shows similarity to two-photon speckle patterns

Discusses potential experimental realization

Abstract

In traditional Hanbury Brown and Twiss (HBT) schemes, the thermal intensity-intensity correlations are phase insensitive. Here we propose a modified HBT scheme with phase conjugation to demonstrate the phase-sensitive and nonfactorizable features for thermal intensity-intensity correlation speckle. Our scheme leads to results that are similar to those of the two-photon speckle. We discuss the possibility of the experimental realization. The results provide us a deeper insight of the thermal correlations and may lead to more significant applications in imaging and speckle technologies.