Isolated attosecond pulse generation from a model of Ar super(+) cluster in a synthesized two-color laser pulse

We theoretically investigate the high-order harmonic generation and isolated attosecond pulse generation from a two-dimensional model of an Ar super(1) cluster in a synthesized two-color laser pulse. A scheme to generate an isolated attosecond pulse is proposed by using a 4-fs 800-nm fundamental fie...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2012-02, Vol.85 (2)
Main Authors: Xia, C-L, Ge, X-L, Zhao, X, Guo, J, Liu, X-S
Format: Article
Language:English
Subjects:
Atomic properties
Attosecond pulses
Bandwidth
Clusters
Harmonic generations
Lasers
Time-frequency analysis
Two dimensional
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Summary:We theoretically investigate the high-order harmonic generation and isolated attosecond pulse generation from a two-dimensional model of an Ar super(1) cluster in a synthesized two-color laser pulse. A scheme to generate an isolated attosecond pulse is proposed by using a 4-fs 800-nm fundamental field in combination with a wavelength-adjustable weaker pulse. When the number of ions surrounding the central atom is 24 and the wavelength-adjustable weaker pulse is chosen to be 1200 nm with the intensity 1x10 super(14) W/cm super(2), an almost linearly polarized isolated attosecond pulse with the duration of 45 as is obtained by superposing a bandwidth of 100 eV near the cutoff of high-order harmonic generation. Moreover, we illustrate the interference effect of the paths in terms of the time-frequency analysis of high-order harmonic generation.
ISSN:1050-2947
DOI:10.1103/PhysRevA.85.025802