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Title: Enhanced filament ablation of metals based on plasma grating in air

We demonstrate efficient ablation of metals with filamentary plasma grating generated by two intense blue femtosecond filaments and a third focused infrared pulse. This scheme leads to significant promotion of ablation efficiency on metal targets in air in comparison with single infrared or blue filament with equal pulse energy. The reason is that the blue plasma grating firstly provides stronger intensity and a higher density of background electrons, then the delayed infrared pulse accelerates local electrons inside the plasma grating. These two processes finally results in robustly increased electron density and highly ionized metallic atoms.
Authors:
; ;  [1] ; ;  [1] ;  [2]
  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22492380
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 9; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABLATION; AIR; ATOMS; COMPARATIVE EVALUATIONS; EFFICIENCY; ELECTRON DENSITY; ELECTRONS; FILAMENTS; GRATINGS; LEAD; MULTICHARGED IONS; PLASMA; PLASMA FILAMENT