Research Papers in Physics and Astronomy

 

Date of this Version

12-2012

Citation

PHYSICAL REVIEW A 86, 063406 (2012); DOI: 10.1103/PhysRevA.86.063406

Comments

Copyright © 2012 American Physical Society. Used by permission.

Abstract

Analytic formulas describing high-order-harmonic generation (HHG) by atoms in an intense laser field with small ellipticity are obtained quantum mechanically in the tunneling limit. The results show that factorization of the HHG yield in terms of an electron wave packet and the photorecombination cross section (PRCS) is valid only for s states of a bound atomic electron, whereas the HHG yield for p states involves two different atomic parameters. For the latter case, elliptic HHG spectroscopy enables one to retrieve both the energy and angular dependence of the PRCS of the target atom, as we illustrate for the case of HHG by Xe in a midinfrared laser field.