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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 3 — Mar. 1, 2012
  • pp: 286–293

Theory of infrared-dressed atomic photoionization by extremely ultraviolet attosecond pulse trains

Han Chieh Lee, Shih Da Jheng, and Tsin Fu Jiang  »View Author Affiliations


JOSA B, Vol. 29, Issue 3, pp. 286-293 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000286


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Abstract

We theoretically study the infrared (IR)-dressed photoionization of atoms excited by extreme ultraviolet attosecond pulse trains above ionization threshold. The initial state of atoms is treated perturbatively by the IR field, and the continuum states are considered as Coulomb–Volkov (CV) waves. CV waves can much reduce the gauge difference calculated with Volkov waves, and, in general, the contribution of ground-state perturbation to the photoelectron spectrum is negligible. Our calculations show qualitative agreement with the experimental results [Phys. Rev. Lett. 95, 013001 (2005)]. An evident dependence of the photoelectron spectrum on the delay phase between the IR field and the attosecond pulse train is exhibited in both helium and argon. The angular distribution of photoelectrons with various IR polarizations and the corresponding photoelectron spectra are presented. The linearly polarized IR fields are shown to have a higher controlling capability of the spectrum via IR delay phases than the circularly polarized fields. On the other hand, the circularly polarized IR fields have a fruitful angular dependence of photoelectrons with various IR delay phases.

© 2012 Optical Society of America

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(340.7480) X-ray optics : X-rays, soft x-rays, extreme ultraviolet (EUV)
(020.2649) Atomic and molecular physics : Strong field laser physics

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: September 22, 2011
Revised Manuscript: November 7, 2011
Manuscript Accepted: November 7, 2011
Published: February 10, 2012

Citation
Han Chieh Lee, Shih Da Jheng, and Tsin Fu Jiang, "Theory of infrared-dressed atomic photoionization by extremely ultraviolet attosecond pulse trains," J. Opt. Soc. Am. B 29, 286-293 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-3-286

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