Quantum-Enhanced Polarimetric Imaging

TL;DR

This paper introduces a quantum polarimetric imaging system that leverages entangled photons to enhance sensitivity and robustness in low-light conditions, with promising applications in biomedical and remote sensing fields.

Contribution

The study presents the first integration of polarization-entangled photon pairs into a polarimetric imaging system, demonstrating improved performance over classical methods under challenging conditions.

Findings

Quantum system visualizes birefringence under low illumination.

Enhanced sensitivity and robustness in low-light environments.

Potential applications in biomedical and remote sensing.

Abstract

Polarimetric imaging, a technique that captures the invisible polarization-related properties of given materials, has broad applications from fundamental physics to advanced fields such as target recognition, stress detection, biomedical diagnosis and remote sensing. The introduction of quantum sources into classical imaging systems has demonstrated distinct advantages, yet few studies have explored their combination with polarimetric imaging. In this study, we present a quantum polarimetric imaging system that integrates polarization-entangled photon pairs into a polarizer-sample-compensator-analyzer (PSRA)-type polarimeter. Our system visualizes the birefringence properties of a periodical-distributed anisotropic material under decreasing illumination levels and diverse disturbing light sources. Compared to the classical system, the quantum approach reveals the superior sensitivity and robustness in low-light conditions, particularly useful in biomedical studies where the low illumination and non-destructive detection are urgently needed. The study also highlights the nonlocality of entangled photons in birefringence measurement, indicating the potential of quantum polarimetric system in the remote sensing domain.