Short Bragg pulse spectroscopy for a paraxial fluids of light
Quantum Gases
2021-07-14 v1 Optics
Quantum Physics
Abstract
We implement Bragg spectroscopy in a paraxial fluid of light. Analogues of short Bragg pulses are imprinted on a photon fluid by wavefront shaping using a spatial light modulator. We measure the dispersion relation and evidence a parabolic single-particle regime as well as a linear phonon regime even for very weakly interacting photons and low sound velocity. Finally, we report a measurement of the static structure factor, , and we demonstrate the presence of pair-correlated excitations, revealing indirectly the quantum depletion in a paraxial fluid of light.
Keywords
Cite
@article{arxiv.2011.12935,
title = {Short Bragg pulse spectroscopy for a paraxial fluids of light},
author = {Clara Piekarski and Wei Liu and Jeff Steinhauer and Elisabeth Giacobino and Alberto Bramati and Quentin Glorieux},
journal= {arXiv preprint arXiv:2011.12935},
year = {2021}
}