Abstract
The Ryderberg electronic wave packet dynamics of hydrogen atom near helium
surface in an electric field is investigated using the semiclassical method. The
autocorrelation function is calculated when the photoionized electron is excited by
a short laser pulse for different atom-surface separations. The results show that
new recurrences appear because of the helium surface, and the number of recurrent
peaks increases with the decrease in atom-surface distance. The new feature is
ascribed to the bifurcation of new closed orbits in the classical dynamics of the
photoionized electron. Therefore, surface properties have a significant effect on
the spectrum of nearby atoms or ions.
© 2011 Chinese Optics Letters
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