# Probing intensity-field correlations of single-molecule surface-enhanced Raman-scattered light

## TL;DR

This paper investigates quantum correlations in single-molecule surface-enhanced Raman scattering using intensity-field correlation measurements, revealing non-classical light signatures and potential squeezing effects in emitted photons.

## Contribution

It introduces a theoretical approach employing conditional homodyne detection to probe quantum correlations in Raman scattering at the single-molecule level.

## Key findings

- Detection of phase-dependent third-order fluctuations
- Signatures of non-classicality in Raman photons
- Potential evidence of squeezing effects

## Abstract

In the context of the quantum-mechanical description of single-molecule surface-enhanced Raman scattering, intensity-field correlation measurements of photons emitted from a plasmonic cavity are explored, theoretically, using the technique of conditional homodyne detection. The inelastic interplay between plasmons and vibrations of a diatomic molecule placed inside the cavity can be manifested in phase-dependent third-order fluctuations of the light recorded by the aforesaid technique, allowing us to reveal signatures of non-classicality (indicatives of squeezing) of the outgoing Raman photons.