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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 9801–9809

Dramatic cutoff extension and broadband supercontinuum generation in multi-cycle two color pulses

Jianghua Luo, Weiyi Hong, Qingbin Zhang, Kunlong Liu, and Peixiang Lu  »View Author Affiliations

Optics Express, Vol. 20, Issue 9, pp. 9801-9809 (2012)

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We propose a method to markedly increase the electron-recollision kinetic energy, using the combination of a 0.8 μm/13 fs driving pulse with a much weaker multi-cycle mid-infrared pulse at 10.4 μm. The results show that the synthesized field effectively lengthens the accelerated distance of electron wave packet and the harmonic cutoff is significantly extended to IP+26UP, which is covered with the water-window spectral region. In addition, only one single quantum path contributes to harmonics, and those higher than IP+15UP become continuous. This supercontinuum can support the generation of an isolated sub-100 as pulse with tunable central wavelength and also the pulse with the duration below one atomic unit of time (24 as). Moreover, our scheme can further extend to more longer driving pulses, which provides a dramatic approach for cutoff extension and broadband supercontinuum generation with multi-cycle pump pulses.

© 2012 OSA

OCIS Codes
(190.4160) Nonlinear optics : Multiharmonic generation
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(300.6560) Spectroscopy : Spectroscopy, x-ray

ToC Category:
Nonlinear Optics

Original Manuscript: March 7, 2012
Revised Manuscript: April 8, 2012
Manuscript Accepted: April 8, 2012
Published: April 16, 2012

Jianghua Luo, Weiyi Hong, Qingbin Zhang, Kunlong Liu, and Peixiang Lu, "Dramatic cutoff extension and broadband supercontinuum generation in multi-cycle two color pulses," Opt. Express 20, 9801-9809 (2012)

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