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Retrieving photorecombination cross sections of atoms from high-order harmonic spectra

Shinichirou Minemoto, Toshihito Umegaki, Yuichiro Oguchi, Toru Morishita, Anh-Thu Le, Shinichi Watanabe, and Hirofumi Sakai
Phys. Rev. A 78, 061402(R) – Published 16 December 2008

Abstract

We observe high-order harmonic spectra generated from a thin atomic medium, Ar, Kr, and Xe, by intense 800nm and 1300nm femtosecond pulses. A clear signature of a single-atom response is observed in the harmonic spectra. Especially in the case of Ar, a Cooper minimum, reflecting the electronic structure of the atom, is observed in the harmonic spectra. We successfully extract the photorecombination cross sections of the atoms in the field-free condition with the help of an accurate recolliding electron wave packet. The present protocol paves the way for exploring ultrafast imaging of molecular dynamics with attosecond resolution.

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  • Received 23 October 2008

DOI:https://doi.org/10.1103/PhysRevA.78.061402

©2008 American Physical Society

Authors & Affiliations

Shinichirou Minemoto1,*, Toshihito Umegaki2, Yuichiro Oguchi1, Toru Morishita2,3,†, Anh-Thu Le4, Shinichi Watanabe2, and Hirofumi Sakai1

  • 1Department of Physics, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
  • 2Department of Applied Physics and Chemistry, University of Electro-Communications, 1-5-1 Chofu-ga-oka, Chofu-shi, Tokyo 182-8585, Japan
  • 3PRESTO, Japan Science and Technology Agency, Kawaguchi-shi, Saitama 332-0012, Japan
  • 4Department of Physics, Cardwell Hall, Kansas State University, Manhattan, Kansas 66506, USA

  • *minemoto@phys.s.u-tokyo.ac.jp
  • toru@pc.uec.ac.jp

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Issue

Vol. 78, Iss. 6 — December 2008

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