Analytical study of residual-current excitation during gas ionization by two-color laser pulse

This work is focused on the analytical investigation of the excitation of low-frequency residual current during gas ionization by two-color laser pulses. Such excitation is of great interest since it may be used to convert efficiently laser pulses into low-frequency radiation, in particular, into ra...

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Bibliographic Details
Published in:Journal of physics. Conference series 2015-03, Vol.594 (1), p.12020
Main Authors: Silaev, A A, Kostin, V A, Laryushin, I D, Vvedenskii, N V
Format: Article
Language:English
Subjects:
Color
Excitation
Gas ionization
Lasers
Mathematical analysis
Physics
Radiation
Terahertz frequencies
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Summary:This work is focused on the analytical investigation of the excitation of low-frequency residual current during gas ionization by two-color laser pulses. Such excitation is of great interest since it may be used to convert efficiently laser pulses into low-frequency radiation, in particular, into radiation of the terahertz frequency band. We derive analytical expressions for the residual current density for the cases when two-color laser pulse contains the main strong fundamental-frequency field and additional frequency-tunable field with the frequency close to the double or half frequency of the main field. Derived formulas are used to analyze and compare main features of residual-current excitation in the cases when additional field is second-or half-harmonic of the main field.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/594/1/012020