Dynamical medium depletion in high-order above-threshold ionization with few-cycle laser pulses

Details Dynamical medium depletion in high-order above-threshold ionization with few-cycle laser pulses Dynamical medium depletion in high-order above-threshold ionization with few-cycle laser pulses

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrva..70f5402a&link_type=abstract

Physical Review A, vol. 70, Issue 6, id. 065402

Physics

7

Multiphoton Ionization And Excitation To Highly Excited States, Ultrafast Processes, Optical Pulse Generation And Pulse Compression, Strong-Field Excitation Of Optical Transitions In Quantum Systems, Multiphoton Processes, Dynamic Stark Shift

Scientific paper

The influence of dynamical medium depletion in high-order above-threshold ionization (ATI) in left/right asymmetry of photoelectron energy spectra is analyzed. Based on a classical analysis of high-order ATI electrons produced by few-cycle laser pulses, calculated asymmetry maps of electron spectra reproduce very well the experimental results reported in

Lindner et al. [Phys. Rev. Lett. 92, 113001 (2004)

], utilized for determining the Guoy phase shift of few-cycle laser pulses. The anomalous behavior of the high-energy part of the ATI electron spectra is, then, fully understood in terms of earlier medium depletion occurring in the leading edge of the laser pulse. In order to correctly reproduce the experimental findings a physical temporal envelope of the laser pulse, which only vanishes at the infinity, plays a crucial role.

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