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Title: Extension of cutoff in high harmonic by using doubly charged ions in a laser-ablation plume

We report high-order harmonic generation from doubly charged ions in laser-ablation plasma produced by different prepulse intensities. At the prepulse intensity of 3.5x10{sup 10} W cm{sup -2}, harmonics up to the 63rd order (12.62 nm wavelength, 98.3 eV photon energy) were obtained by using a laser-ablation titanium plume. From analysis of the harmonics and visible radiation from the laser-ablation titanium plume at different prepulse intensities, we conclude that the highest harmonics near the cutoff region originated from doubly charged titanium ions. These studies show the effectiveness of using doubly charged ions to extend the cutoff energy of high-order harmonics.
Authors:
; ;  [1] ;  [2] ; ;  [3]
  1. The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan)
  2. Scientific Association Akadempribor, Academy of Sciences of Uzbekistan, Akademgorodok, Tashkent 700125 (Uzbekistan)
  3. Institut National de la Recherche Scientifique, 1650 boul. Lionel-Boulet, Varennes (Quebec) J3X 1S2 (Canada)
Publication Date:
OSTI Identifier:
21013795
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the Optical Society of America. Part B, Optical Physics; Journal Volume: 24; Journal Issue: 11; Other Information: DOI: 10.1364/JOSAB.24.002847; (c) 2007 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABLATION; HARMONIC GENERATION; HARMONICS; LASERS; LIGHT TRANSMISSION; PHOTONS; PLASMA; PLUMES; TITANIUM; TITANIUM IONS; VISIBLE RADIATION; WAVELENGTHS