ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Attosecond pulse generation from two-electron harmonic emission spectrum |
Feng Li-Qiang (冯立强)a b, Liu Hang (刘航)c |
a College of Science, Liaoning University of Technology, Jinzhou 121000, China;
b State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
c School of Chemical and Environmental Engineering, Liaoning University of Technology, Jinzhou 121000, China |
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Abstract In this paper, we theoretically investigate the high-order harmonic generation and attosecond pulse generation when a two-electron He atom is exposed to the intense laser pulse. It shows that due to the two-electron double recombination mechanism, an extended plateau beyond the classical single-electron harmonic has been obtained on the two-electron harmonic spectrum. Further by using this two-electron harmonic extension scheme combined with the two-color field, two supercontinuum bandwidths with 200 eV have been obtained. As a result, a series of sub-60 as extreme ultraviolet (XUV) pulses have been directly generated.
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Received: 25 August 2014
Revised: 26 September 2014
Accepted manuscript online:
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PACS:
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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32.80.Fb
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(Photoionization of atoms and ions)
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Fund: Project supported by the Scientific Research Fund of Liaoning Provincial Education Department, China (No. L2014242) and the Scientific Research Fund of Liaoning University of Technology, China (Grant Nos. X201319 and X201312). |
Corresponding Authors:
Feng Li-Qiang, Liu Hang
E-mail: lqfeng_lngy@126.com;liuhang20@126.com
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Cite this article:
Feng Li-Qiang (冯立强), Liu Hang (刘航) Attosecond pulse generation from two-electron harmonic emission spectrum 2015 Chin. Phys. B 24 034206
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