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Significantly enhanced conversion efficiency of high-order harmonic generation by introducing chirped laser pulses into scheme of spatially inhomogeneous field.

Authors :
Han JX
Wang J
Qiao Y
Liu AH
Guo FM
Yang YJ
Source :
Optics express [Opt Express] 2019 Mar 18; Vol. 27 (6), pp. 8768-8776.
Publication Year :
2019

Abstract

An effective scheme to enhance the yield of high-order harmonic generation originated from spatially inhomogeneous field through the interaction between few-cycle chirped laser pulses and a nano-tip structure is demonstrated. The conversion efficiency of harmonics from chirped laser pulses was significantly improved by nearly three more orders of magnitude than that of chirp-free pulses, and the cutoff energy of the corresponding harmonics was dramatically enhanced. By superimposing a series of properly selected orders of harmonics, isolated attosecond pulses of high intensity can be obtained. Furthermore, we compared the effects of different types of chirps on harmonics.

Details

Language :
English
ISSN :
1094-4087
Volume :
27
Issue :
6
Database :
MEDLINE
Journal :
Optics express
Publication Type :
Academic Journal
Accession number :
31052689
Full Text :
https://doi.org/10.1364/OE.27.008768