Laser driven superradiant ensembles of two-level atoms near Dicke's regime

• URL: http://arxiv.org/abs/2107.13392v1
• Date: Wed, 28 Jul 2021 14:32:59 GMT
• Title: Laser driven superradiant ensembles of two-level atoms near Dicke's regime
• Authors: G. Ferioli, A. Glicenstein, F. Robicheaux, R. T. Sutherland, A. Browaeys and I. Ferrier-Barbut
• Abstract summary: We report the experimental observation of superradiant emission emanating from an elongated dense ensemble of laser cooled two-level atoms. In the presence of a strong driving laser, we observe that the system is superradiant along its symmmetry axis.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report the experimental observation of superradiant emission emanating from an elongated dense ensemble of laser cooled two-level atoms, with a radial extent smaller than the transition wavelength. In the presence of a strong driving laser, we observe that the system is superradiant along its symmmetry axis. This occurs even though the driving laser is orthogonal to the superradiance direction. This superradiance modifies the spontaneous emission, and, resultantly, the Rabi oscillations. We also investigate Dicke superradiance in the emission of an almost fully-inverted system as a function of atom numnber. The experimental results are in qualitative agreement with ab-initio, beyond-mean-field calculations.

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