Coherent flash of light emitted by a cold atomic cloud
Maryvonne Chalony (INLN), Romain Pierrat (ESPCI), Dominique Delande, (LKB - Jussieu), David Wilkowski (INLN, CQT)
TL;DR
This paper investigates the coherent flash of light emitted by a cold atomic cloud when a resonant laser is abruptly turned off, analyzing its properties and phase without interferometry, with results matching theoretical models.
Contribution
It provides a detailed quantitative analysis of the transient coherent emission and introduces a method to reconstruct the phase without interferometric tools.
Findings
Good agreement between experiment and theory
Phase of the coherent field reconstructed without interferometry
Characterization of spatio-temporal properties of the flash
Abstract
When a resonant laser sent on an optically thick cold atomic cloud is abruptly switched off, a coherent flash of light is emitted in the forward direction. This transient phenomenon is observed due to the highly resonant character of the atomic scatterers. We analyze quantitatively its spatio-temporal properties and show very good agreement with theoretical predictions. Based on complementary experiments, the phase of the coherent field is reconstructed without interferometric tools.
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Taxonomy
TopicsQuantum optics and atomic interactions · Random lasers and scattering media · Near-Field Optical Microscopy