Stimulated resonant bremsstrahlung in a high-frequency electromagnetic pump field

doi:10.1016/0375-9601(96)00366-0

Physics Letters A

Volume 221, Issues 1–2, 23 September 1996, Pages 5-13

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Abstract

Direct and inverse stimulated bremsstrahlung of low-energy photons at the scattering of an electron on a one-dimensional short range potential in the field of a strong high frequency pump wave is considered. It is shown that the strong pump wave essentially changes the nature of the stimulated bremsstrahlung. The latter results in resonant behavior. The small signal gain of the resonant stimulated bremsstrahlung is calculated and the possibility of its observation is considered.

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The present work is a report on recent progress made in our understanding of electron–atom collisions in a laser field. To some extent it is a continuation of a previous review covering a somewhat larger subject (Can. J. Phys. 63 (1985) 907). We shall discuss the present status of investigations in this field from the theoretical as well as experimental point of view but most of the report will be devoted to an analysis of the various approximation schemes used at present in this field to describe the different aspects of laser-assisted electron–atom interactions. As the table of contents shows, most of the work done so far is treating the atom as a spectator, described by a potential and only very little has been achieved over the years to include the atomic structure into consideration since the inclusion of these structure effects poses considerable computational problems. Since, for example, multiphoton ionization and its inverse process laser-assisted recombination may be considered as one half of a scattering process, it is quite natural that some of the theoretical techniques described here are also of interest for the treatment of other multiphoton processes not considered here since there are several other recent reviews available on these topics.

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Stimulated resonant bremsstrahlung in a high-frequency electromagnetic pump field

Abstract

Phys. Lett. A

Phys. Rev. Lett.

Phys. Rev. Lett.

Phys. Rev. Lett.

Phys. Rev. A

Sov. Phys. JETP

Phys. Rev. A