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Pré-Publication, Document De Travail Année : 2014

Cooperative emission of a coherent superflash of light

Résumé

We investigate the transient coherent transmission of light through an optically thick cold strontium gas. We observe a coherent superflash just after an abrupt probe extinction, with peak intensity more than 3 times the incident one. We show that this coherent superflash is a direct signature of the cooperative forward scattering emission of the atoms induced by the probe in the stationary regime. Thus, surprisingly we find that the forward scattering amplitude can be larger than the incident probe excitation amplitude. By engineering fast transient phenomena on the incident field, we give a clear and simple picture of the physical mechanisms at play.
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Dates et versions

hal-00994145 , version 1 (21-05-2014)
hal-00994145 , version 2 (04-12-2014)

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Chang Chi Kwong, Tao Yang, Mysore S. Pramod, Kanhayia Pandey, Dominique Delande, et al.. Cooperative emission of a coherent superflash of light. 2014. ⟨hal-00994145v1⟩
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