Theoretical exploration of control factors for the high-order harmonic generation (HHG) spectrum in two-color field

Spectrochim Acta A Mol Biomol Spectrosc. 2014 Sep 15:130:19-23. doi: 10.1016/j.saa.2014.03.098. Epub 2014 Apr 2.

Abstract

In this work, the laser-parameter effects on the high-order harmonic generation (HHG) spectrum and attosecond trains by mixing two-color laser field, a visible light field of 800 nm and a mid-infrared (mid-IR) laser pulses of 2400 nm, are theoretically demonstrated for the first time. Different schemes are applied to discuss the function of intensity, carrier-envelope phase (CEP) and pulse duration on the generation of an isolated attosecond pulse. As a consequence, an isolated 16as pulse is obtained by Fourier transforming an ultrabroad XUV continuum of 208 eV with the fundamental field of duration of 6 fs, 9×10(14)W/cm2 of intensity, the duration of 12 fs, the CEPs of the two driving pulses of -π and the relative strength ratio √R=0.2.

Keywords: Attosecond; Carrier-envelope phase; High-order harmonic generation; Time-dependent wave packet.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Color
  • Computer Simulation
  • Electrons
  • Fourier Analysis
  • Gases
  • Kinetics
  • Lasers*
  • Light
  • Models, Theoretical
  • Motion
  • Scattering, Radiation
  • Spectrophotometry, Infrared / instrumentation
  • Spectrophotometry, Infrared / methods*
  • Time Factors

Substances

  • Gases