Year: 2016
Author: Hui Du, Xin-Lei Ge, Yun-Tao Lin, Hui-Ying Zhong, Jing Guo, Xue-Shen Liu
Journal of Atomic and Molecular Sciences, Vol. 7 (2016), Iss. 3 : pp. 146–154
Abstract
We theoretically study the high-order harmonic and the isolated attosecond pulse generation in the near-infrared (IR) (3-fs, 800 nm) laser pulse by adding a terahertz (THz) controlling field with proper phases. It is found that the high-order harmonic spectrum in the IR pulse by adding a terahertz field is broader and smoother than that in the single IR pulse. The underlying physical mechanism is illustrated by means of the time-frequency analysis and the three-step model. We calculate the ionization rate by ADK model to further demonstrate the process of high-order harmonic generation. By superposing a proper range of harmonic spectrum, an isolated attosecond pulse with the duration of 71 as is obtained.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/jams.022516.041916a
Journal of Atomic and Molecular Sciences, Vol. 7 (2016), Iss. 3 : pp. 146–154
Published online: 2016-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 9
Keywords: High-order harmonic generation isolated attosecond pulse terahertz pulse.
Author Details
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https://doi.org/10.1080/00387010.2017.1322987 [Citations: 2]