Quantum-Enhanced continuous-wave stimulated Raman spectroscopy
- URL: http://arxiv.org/abs/2002.04674v1
- Date: Tue, 11 Feb 2020 20:50:35 GMT
- Title: Quantum-Enhanced continuous-wave stimulated Raman spectroscopy
- Authors: R. B. Andrade, H. Kerdoncuff, K. Berg-S{\o}rensen, T. Gehring, M.
Lassen, and U. L. Andersen
- Abstract summary: We demonstrate an enhancement of the sensitivity of continuous-wave stimulated Raman spectroscopy by reducing the quantum noise of the probing light below the shot-noise limit by means of amplitude squeezed states of light.
Our proof-of-concept demonstration of quantum-enhanced Raman spectroscopy paves the way for a generation of new Raman microscopes.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Stimulated Raman spectroscopy has become a powerful tool to study the
spatiodynamics of molecular bonds with high sensitivity, resolution and speed.
However, sensitivity and speed of state-of-the-art stimulated Raman
spectroscopy are currently limited by the shot-noise of the light beam probing
the Raman process. Here, we demonstrate an enhancement of the sensitivity of
continuous-wave stimulated Raman spectroscopy by reducing the quantum noise of
the probing light below the shot-noise limit by means of amplitude squeezed
states of light. Probing polymer samples with Raman shifts around 2950
$cm^{-1}$ with squeezed states, we demonstrate a quantum-enhancement of the
stimulated Raman signal-to-noise ratio (SNR) of 3.60 dB relative to the
shot-noise limited SNR. Our proof-of-concept demonstration of quantum-enhanced
Raman spectroscopy paves the way for a new generation of Raman microscopes,
where weak Raman transitions can be imaged without the use of markers or an
increase in the total optical power.
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