Abstract
The fluorescence dynamics of optically dense but dilute atomic ensembles cooled to sub-Doppler temperatures and excited by resonant pulsed radiation is studied. Apart from total radiation intensity, the temporal variations of the spectral composition of fluorescence and its polarization, as well as the variation of the spatial distribution of excitation in the atomic ensemble, are analyzed. Based on this analysis, it is shown that the role of radiation trapping becomes smaller with time, and subradiance quantum states formed as a result of the resonant dipole–dipole interatomic interaction become the main factor determining the slow atomic excitation decay. The dependence of the subradiance form on the ensemble size is analyzed.
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This work was performed under the State assignment for fundamental research (theme code FSEG-2020-0024).
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Translated by N. Wadhwa
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Sokolov, I.M. Subradiance of Cold and Dilute Atomic Ensembles Excited by Resonant Pulsed Radiation. J. Exp. Theor. Phys. 132, 56–62 (2021). https://doi.org/10.1134/S1063776121010040
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DOI: https://doi.org/10.1134/S1063776121010040