We demonstrate that superradiance and collective atomic recoil lasing from cold atoms can be enhanced using a two-frequency pump with frequency difference twice the two-photon recoil frequency ωr. In the good-cavity regime the atoms behave as a three-recoil-level system, collectively scattering a single-frequency radiation mode. In the bad-cavity regime, the superradiant cascade through the different recoil momentum states is strongly accelerated. The emitted radiation shows a discrete spectrum whose harmonics are separated by 2 ωr and generated by transitions between adjacent momentum levels.

Accelerated superradiance and collective atomic recoil lasing with a two-frequency pump / M. Cola, L. Volpe, N. U. C. Piovella. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 79:1(2009), pp. 013613.013613.1-013613.013613.5. [10.1103/PhysRevA.79.013613]

Accelerated superradiance and collective atomic recoil lasing with a two-frequency pump

M. Cola
Primo
;
L. Volpe
Secondo
;
N.U.C. Piovella
Ultimo
2009

Abstract

We demonstrate that superradiance and collective atomic recoil lasing from cold atoms can be enhanced using a two-frequency pump with frequency difference twice the two-photon recoil frequency ωr. In the good-cavity regime the atoms behave as a three-recoil-level system, collectively scattering a single-frequency radiation mode. In the bad-cavity regime, the superradiant cascade through the different recoil momentum states is strongly accelerated. The emitted radiation shows a discrete spectrum whose harmonics are separated by 2 ωr and generated by transitions between adjacent momentum levels.
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/141899
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