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

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.

Keywords: high-order harmonic generation isolated attosecond pulse chirped laser field

Received: 17 August 2009
Revised: 06 February 2010
Accepted manuscript online:

PACS:	3280K
	4265K

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10974068).

Cite this article:

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 2010 Chin. Phys. B 19 093201

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

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