Short Bragg pulse spectroscopy for a paraxial fluids of light
- URL: http://arxiv.org/abs/2011.12935v1
- Date: Wed, 25 Nov 2020 18:39:16 GMT
- Title: Short Bragg pulse spectroscopy for a paraxial fluids of light
- Authors: Clara Piekarski, Wei Liu, Jeff Steinhauer, Elisabeth Giacobino,
Alberto Bramati and Quentin Glorieux
- Abstract summary: We implement Bragg spectroscopy in a paraxial fluid of light.
We measure the dispersion relation and evidence a parabolic single-particle regime.
We demonstrate the presence of pair-correlated excitations, revealing indirectly the quantum depletion in a paraxial fluid of light.
- Score: 4.482026306271676
- License: http://creativecommons.org/licenses/by/4.0/
- 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, $S(k)$, and we demonstrate the
presence of pair-correlated excitations, revealing indirectly the quantum
depletion in a paraxial fluid of light.
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