Nonlinear radiation imprisonment in magneto-optical vapor traps

N. N. Bezuglov, A. F. Molisch, F. Fuso, M. Allegrini, A. Ekers

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Abstract

We analyze nonlinear radiation imprisonment (RI) effects in an optically thick vapor in different temperature regimes. An analytical approach is proposed to treat nonlinear decay problems. Special attention is paid to vapor samples having curvilinear geometries (cylinder, sphere) and being excited by a strong laser pulse. We derive a number of new formulas for different radiative trapping factors as functions of opacity and propose a general approach for RI evaluation allowing us to deal with samples both at room and low, or very low, temperatures, such as those customarily achieved in magneto-optical trap (MOT) experiments. As a result, we predict a "subnatural" decay of radiation escaping from cold vapors, which can be envisioned as the basis for a sensitive and reliable MOT diagnostic tool.

Original languageEnglish
Article number063414
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume77
Issue number6
DOIs
Publication statusPublished - 13 Jun 2008

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Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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