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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 5 — Feb. 28, 2011
  • pp: 4728–4739

Intense isolated attosecond pulse generation in pre-excited medium

Weiyi Hong, Qingbin Zhang, Xiaosong Zhu, and Peixiang Lu  »View Author Affiliations

Optics Express, Vol. 19, Issue 5, pp. 4728-4739 (2011)

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We present a theoretical study of isolated attosecond pulse generation in pre-excited medium driven by an intense few-cycle laser pulse. We show that the generation of the macroscopic xuv supercontinuum is governed by the initial population of the excited state. Large initial population of the excited state leads to the high density of the free electrons in the media and strongly changes macroscopic properties of the driving pulse and the supercontinuum, and diminishes the isolated attosecond pulse generation. Instead, small initial population of 5% in the pre-excited media subjected to the few-cycle driving pulse can produce well phase-matched xuv supercontinuum, and a pure intense isolated attosecond pulse with the pulse duration of approximately 150 as and the pulse energy up to 0.5 nJ is directly obtained.

© 2011 Optical Society of America

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: January 21, 2011
Revised Manuscript: February 15, 2011
Manuscript Accepted: February 16, 2011
Published: February 24, 2011

Weiyi Hong, Qingbin Zhang, Xiaosong Zhu, and Peixiang Lu, "Intense isolated attosecond pulse generation in pre-excited medium," Opt. Express 19, 4728-4739 (2011)

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