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Title: Modification of modulated plasma plumes for the quasi-phase-matching of high-order harmonics in different spectral ranges

We demonstrate the technique allowing the fine tuning of the distance between the laser-produced plasma plumes on the surfaces of different materials, as well as the variation of the sizes of these plumes. The modification of plasma formations is based on the tilting of the multi-slit mask placed between the heating laser beam and target surface, as well as the positioning of this mask in the telescope placed on the path of heating radiation. The modulated plasma plumes with the sizes of single plume ranging between 0.1 and 1 mm were produced on the manganese and silver targets. Modification of the geometrical parameters of plasma plumes proved to be useful for the fine tuning of the quasi-phase-matched high-order harmonics generated in such structures during propagation of the ultrashort laser pulses. We show the enhancement of some groups of harmonics along the plateau range and the tuning of maximally enhanced harmonic by variable modulation of the plasma.
Authors:
 [1] ;  [2] ; ; ; ; ;  [1] ; ; ;  [3]
  1. Institute of Ion-Plasma and Laser Technologies, 33 Dormon Yoli Street, Tashkent 100125 (Uzbekistan)
  2. (Japan)
  3. Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan)
Publication Date:
OSTI Identifier:
22407988
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HARMONICS; LASER TARGETS; LASER-PRODUCED PLASMA; LASER-RADIATION HEATING; MANGANESE; MODULATION; PHOTON BEAMS; PLUMES; PULSES; SILVER; TELESCOPES; TUNING