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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Spontaneous emission of a confined atom

Kazimierz Rza̧żewski, W. Żakowicz

Published Sep 24, 1993• 0 citations
Publisher

Abstract

Modifications of a natural emission line of a free atom, due to its concentrated center of mass wave-function, have been studied. The Doppler shifts, associated with the corresponding momenta distribution of the wave packet, are responsible for the shape of the emitted line. We found, that the modifications of the emission line shape do not cause any changes in the life time and the total radiation intensity.

DOI
10.1117/12.155685

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Modifications of a natural emission line of a free atom, due to its concentrated center of mass wave-function, have been studied. The Doppler shifts, associated with the corresponding momenta distribution of the wave packet, are responsible for the shape of the emitted line. We found, that the modifications of the emission line shape do not cause any changes in the life time and the total radiation intensity.
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As a contribution to quantum optics in the vicinity of surfaces we study the single atom spontaneous emission in a linear chain of two-level atoms. The electromagnetic field is thereby treated with the help of integro-differential equations which take into account the interaction with the other atoms in the chain. The life time of the excited atom, the frequency shift of the atomic transition and the angular distribution of emitted photons are worked out. They depend on the position of the emitting atom. As compared with the single atom in free space, considerable modifications occur for atoms a few interatomic distances away from the ends of the chain.