Observing thermal lensing with quantum light

TL;DR

This paper explores the use of quantum illumination to observe thermal lensing in gold nanorod suspensions, demonstrating enhanced noise management and providing insights into quantum light interactions in complex plasmonic media.

Contribution

It introduces a novel application of quantum illumination in thermal lensing experiments, advancing understanding of quantum light effects in plasmonic systems.

Findings

Quantum illumination improves noise rejection in thermal lensing measurements.

The method provides detailed insights into the behavior of nanorod suspensions under pumping.

This work advances the integration of quantum techniques in complex media analysis.

Abstract

The introduction of quantum methods in spectroscopy can provide enhanced performance and technical advantages in the management of noise. We investigate the application of quantum illumination in a pump and probe experiment. Thermal lensing in a suspension of gold nanorods is explored using a classical beam as the pump and the emission from parametric downconversion as the probe. We obtain an insightful description of the behaviour of the suspension under pumping with a method known to provide good noise rejection. Our findings are a further step towards investigating effects of quantum light in complex plasmonic media.