High-Order Harmonic Generation from Ions in a Capillary Discharge

David M. Gaudiosi, Brendan Reagan, Tenio Popmintchev, Michael Grisham, Mark Berrill, Oren Cohen, Barry C. Walker, Margaret M. Murnane, Henry C. Kapteyn, and Jorge J. Rocca
Phys. Rev. Lett. 96, 203001 – Published 25 May 2006

Abstract

We demonstrate a significant extension of the high-order harmonic cutoff by using a fully-ionized capillary discharge plasma as the generation medium. The preionized plasma dramatically reduces ionization-induced defocusing and energy loss of the driving laser due to ionization. This allows for significantly higher photon energies, up to 150 eV, to be generated from xenon ions, compared with the 70 eV observed previously. We also demonstrate enhancement of the harmonic flux of nearly 2 orders of magnitude at photon energies around 90 eV when the capillary discharge is used to ionize xenon, compared with harmonic generation in a hollow waveguide. The use of a plasma as a medium for high-order harmonic generation shows great promise for extending efficient harmonic generation to much shorter wavelengths using ions.

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  • Received 19 January 2006

DOI:https://doi.org/10.1103/PhysRevLett.96.203001

©2006 American Physical Society

Authors & Affiliations

David M. Gaudiosi2, Brendan Reagan3, Tenio Popmintchev2, Michael Grisham3, Mark Berrill3, Oren Cohen2, Barry C. Walker4, Margaret M. Murnane2, Henry C. Kapteyn2, and Jorge J. Rocca3

  • 1NSF ERC for Extreme Ultraviolet Science and Technology
  • 2JILA, University of Colorado and National Institute of Standards and Technology, 440 UCB, Boulder, Colorado, 80309-0440, USA
  • 3Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, Colorado 80523, USA
  • 4Department of Physics and Astronomy, University of Delaware, 223 Sharp Laboratory, Newark, Delaware 19716, USA

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Issue

Vol. 96, Iss. 20 — 26 May 2006

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