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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 8 — Apr. 18, 2005
  • pp: 2941–2947

Scaling of keV HHG photon yield with drive wavelength

Ariel Gordon and Franz X. Kärtner  »View Author Affiliations

Optics Express, Vol. 13, Issue 8, pp. 2941-2947 (2005)

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We study semi-analytically and numerically the photon yield of high harmonic generation (HHG) on the level of the single atom response under ideal conditions: no initial depletion of the ground state prior to the main peak of the pump pulse. We show that the yield decreases exponentially as function of the cutoff energy starting at about 0.5keV in the case of a Ti:sapphire source and a helium target. We show that the yield in helium beyond the 1keV energy range can be increased by orders of magnitude when long wavelength driver sources in the range from 1.5µm to 3µm are used. This finding leads to the conclusion that significant HHG beyond 1keV is possible through long wavelength driver pulses.

© 2005 Optical Society of America

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(260.7200) Physical optics : Ultraviolet, extreme
(340.7480) X-ray optics : X-rays, soft x-rays, extreme ultraviolet (EUV)

ToC Category:
Research Papers

Original Manuscript: March 8, 2005
Revised Manuscript: March 30, 2005
Published: April 18, 2005

Ariel Gordon and Franz Kärtner, "Scaling of keV HHG photon yield with drive wavelength," Opt. Express 13, 2941-2947 (2005)

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