Resonant enhancement of generation of harmonics
Date
2008
Authors
Ivanov, Igor
Kheifets, Anatoli
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Volume Title
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American Physical Society
Abstract
We develop a Floquet based formalism which describes a process of the generation harmonics of in an atom driven by a laser field. Using this formalism, we show that several harmonics are strongly enhanced in the spectrum when the laser frequency is such that a multiphoton resonance occurs between the initial state and a quasienergy state. We illustrate these findings by a numerical calculation of the harmonics generation in the potassium and rubidium atoms driven by a laser in the near-infrared energy range. The present formalism is also applicable when the initial state is a coherent superposition of several field-free atomic states.
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Keywords: Atomic physics; Atoms; Lasers; Multiphoton processes; Numerical analysis; Potassium; Rubidium; Atomic states; Coherent superpositions; Floquet; Generation of harmonics; Harmonics generations; Infrared energies; Initial states; Laser fields; Laser frequenc
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Physical Review A: Atomic, Molecular and Optical Physics
Type
Journal article
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2037-12-31
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