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Title: Control of the high-order harmonics cutoff and attosecond pulse generation through the combination of a chirped fundamental laser and a subharmonic laser field

Abstract

We propose a method to generate an isolated attosecond (as) pulse in combination with a chirped fundamental laser field (5 fs, 800 nm) and a subharmonic laser field (12 fs, 1600 nm). It is shown that, for the case of the chirped parameter {beta}=0.25, not only is the efficiency of the extended harmonics enhanced, but also an ultrabroad supercontinuum is formed in the second plateau. For the case of {beta}=0.65, an ultrabroad supercontinuum spectrum with the width of about 1670 eV can be observed. Furthermore, due to the introduction of chirped pulse, the short quantum trajectory is enhanced, and the long one is suppressed. By superposing a properly selected range of the harmonic spectrum in the continuum region, an intense isolated 38-as pulse is generated.

Authors:
; ; ;  [1]
  1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 (China)
Publication Date:
OSTI Identifier:
21442937
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 82; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.82.013411; (c) 2010 The American Physical Society; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CONTROL; EFFICIENCY; EMISSION SPECTRA; EV RANGE; HARMONIC GENERATION; HARMONICS; LASER RADIATION; PULSES; ELECTROMAGNETIC RADIATION; ENERGY RANGE; FREQUENCY MIXING; OSCILLATIONS; RADIATIONS; SPECTRA

Citation Formats

Jie, Wu, Gangtai, Zhang, Changlong, Xia, and Xueshen, Liu. Control of the high-order harmonics cutoff and attosecond pulse generation through the combination of a chirped fundamental laser and a subharmonic laser field. United States: N. p., 2010. Web. doi:10.1103/PHYSREVA.82.013411.
Jie, Wu, Gangtai, Zhang, Changlong, Xia, & Xueshen, Liu. Control of the high-order harmonics cutoff and attosecond pulse generation through the combination of a chirped fundamental laser and a subharmonic laser field. United States. doi:10.1103/PHYSREVA.82.013411.
Jie, Wu, Gangtai, Zhang, Changlong, Xia, and Xueshen, Liu. Thu . "Control of the high-order harmonics cutoff and attosecond pulse generation through the combination of a chirped fundamental laser and a subharmonic laser field". United States. doi:10.1103/PHYSREVA.82.013411.
@article{osti_21442937,
title = {Control of the high-order harmonics cutoff and attosecond pulse generation through the combination of a chirped fundamental laser and a subharmonic laser field},
author = {Jie, Wu and Gangtai, Zhang and Changlong, Xia and Xueshen, Liu},
abstractNote = {We propose a method to generate an isolated attosecond (as) pulse in combination with a chirped fundamental laser field (5 fs, 800 nm) and a subharmonic laser field (12 fs, 1600 nm). It is shown that, for the case of the chirped parameter {beta}=0.25, not only is the efficiency of the extended harmonics enhanced, but also an ultrabroad supercontinuum is formed in the second plateau. For the case of {beta}=0.65, an ultrabroad supercontinuum spectrum with the width of about 1670 eV can be observed. Furthermore, due to the introduction of chirped pulse, the short quantum trajectory is enhanced, and the long one is suppressed. By superposing a properly selected range of the harmonic spectrum in the continuum region, an intense isolated 38-as pulse is generated.},
doi = {10.1103/PHYSREVA.82.013411},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 82,
place = {United States},
year = {2010},
month = {7}
}