Extension of high-order harmonics and generation of an isolated attosecond pulse in the chirped laser field

doi:10.1088/1674-1056/19/9/093201

中国物理B ›› 2010, Vol. 19 ›› Issue (9): 93201-093201.doi: 10.1088/1674-1056/19/9/093201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Extension of high-order harmonics and generation of an isolated attosecond pulse in the chirped laser field

伍杰, 翟振, 刘学深

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

收稿日期:2009-08-17 修回日期:2010-02-06 出版日期:2010-09-15 发布日期:2010-09-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10974068).

Extension of high-order harmonics and generation of an isolated attosecond pulse in the chirped laser field

Wu Jie(伍杰),Zhai Zhen(翟振), and Liu Xue-Shen(刘学深)^†

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

Received:2009-08-17 Revised:2010-02-06 Online:2010-09-15 Published:2010-09-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10974068).

摘要/Abstract

摘要： This paper theoretically investigates the high-order harmonic generation cutoff extension using intense few-cycle linearly chirped laser pulses. It shows that the cutoff of the harmonic can be extended remarkably by optimising the chirping parameters. The time-frequency characteristics of high-order harmonics with different chirping parameters are analysed by means of wavelet transform of the dipole acceleration. It also gives out the classical three-step model pictures of electron. By superposing a properly selected range of the harmonic spectrum, it obtains an isolated 65as pulse.

Abstract: This paper theoretically investigates the high-order harmonic generation cutoff extension using intense few-cycle linearly chirped laser pulses. It shows that the cutoff of the harmonic can be extended remarkably by optimising the chirping parameters. The time-frequency characteristics of high-order harmonics with different chirping parameters are analysed by means of wavelet transform of the dipole acceleration. It also gives out the classical three-step model pictures of electron. By superposing a properly selected range of the harmonic spectrum, it obtains an isolated 65as pulse.

Key words: high-order harmonic generation, isolated attosecond pulse, chirped laser field

中图分类号:

3280K

伍杰, 翟振, 刘学深. Extension of high-order harmonics and generation of an isolated attosecond pulse in the chirped laser field[J]. 中国物理B, 2010, 19(9): 93201-093201.

Wu Jie(伍杰),Zhai Zhen(翟振), and Liu Xue-Shen(刘学深). Extension of high-order harmonics and generation of an isolated attosecond pulse in the chirped laser field[J]. Chin. Phys. B, 2010, 19(9): 93201-093201.

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Extension of high-order harmonics and generation of an isolated attosecond pulse in the chirped laser field

Extension of high-order harmonics and generation of an isolated attosecond pulse in the chirped laser field

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