Excitation of atomic coherence at XUV transition enhanced by tunneling in an electric field for X-ray generation

Rostovtsev, Yuri V.

doi:10.1080/09500340903365993

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2010

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Cited by 2 publications

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“…attosecond, laser technology allows searchers to obtain ultra-strong fields [39]. Interaction of such strong and broadband fields with a two-level atomic system, even under the action of a far-off resonance laser radiation is of current interest [27,28,[40][41][42]. Strong short laser pulses can excite remarkable coherence on high frequency transitions; and this coherence can be used for surprisingly efficient generation of XUV radiation [27,28,41,42].…”

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confidence: 99%

Coherent excitation of a two-level atom driven by a far-off-resonant classical field: Analytical solutions

Jha

Rostovtsev

2010

Phys. Rev. A

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We present an analytical treatment of coherent excitation of a two-level atom driven by a far-off-resonant classical field. A class of pulse envelope is obtained for which this problem is exactly solvable. The solutions are given in terms of the Heun function, which is a generalization of the hypergeometric function. Degeneracy of the Heun to a hypergeometric equation can give all the exactly solvable pulse shapes of Gauss hypergeometric form from the generalized pulse shape obtained here. We discuss the application of the results obtained to the generation of soft x-ray and ultraviolet radiations.

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