High-order harmonic generation with a two-color laser pulse

We theoretically investigate the electron dynamics of the high-order harmonics generation process by combining a near-infrared 800 nm driving pulse with a mid-infrared 2000 nm control field. We also investigate the emission time of harmonics using time-frequency analysis to illustrate the physical m...

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Bibliographic Details
Published inChinese physics B Vol. 21; no. 3; pp. 176 - 180
Main Authors Luo, Lao-Yong, Du, Hong-Chuan, Hu, Bi-Tao
Format Journal Article
LanguageEnglish
Published 01.03.2012
Subjects
Delay
Dynamic tests
Dynamics
Emission analysis
Field strength
Harmonic generations
Harmonics
Ionization
Lasers
发射时间
控制领域
时频分析
激光脉冲
物理机制
生成过程
颜色
高次谐波产生
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/21/3/033202

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Summary:We theoretically investigate the electron dynamics of the high-order harmonics generation process by combining a near-infrared 800 nm driving pulse with a mid-infrared 2000 nm control field. We also investigate the emission time of harmonics using time-frequency analysis to illustrate the physical mechanisms of high-order harmonic generation. We calculate the ionization rate using the Ammoso Delone-Krainov model and interpret the variations in harmonic intensity for different control field strengths and delays. We find that the width of the harmonic plateau can be extended when the control electric field is added, and a supercontinuum from 198 to 435 eV is generated, from which an isolated 61-as pulse can be directly obtained.
Bibliography:Luo Lao-Yong Du Hong-Chuan and Hu Bi-Tao School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
high-order harmonic generation, attosecond pulse
We theoretically investigate the electron dynamics of the high-order harmonics generation process by combining a near-infrared 800 nm driving pulse with a mid-infrared 2000 nm control field. We also investigate the emission time of harmonics using time-frequency analysis to illustrate the physical mechanisms of high-order harmonic generation. We calculate the ionization rate using the Ammoso Delone-Krainov model and interpret the variations in harmonic intensity for different control field strengths and delays. We find that the width of the harmonic plateau can be extended when the control electric field is added, and a supercontinuum from 198 to 435 eV is generated, from which an isolated 61-as pulse can be directly obtained.
11-5639/O4
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SourceType-Scholarly Journals-1
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/3/033202