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Title: Role of multiple shots of femtosecond laser pulses in periodic surface nanoablation

Using a pump and probe technique, we observed time-dependent change in reflectivity of crystalline silicon surface to study the dynamic process of periodic surface nanostructure formation in femtosecond (fs) laser ablation. The results have shown that multiple shots of low-fluence fs laser pulses play the crucial role in the non-thermal process for nanostructuring through the increasing bonding structure change to amorphous silicon and resulting decrease in the ablation threshold.
Authors:
;  [1]
  1. Advanced Laser Science Research Section, Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)
Publication Date:
OSTI Identifier:
22218224
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 7; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; ABLATION; BONDING; LASERS; NANOSTRUCTURES; PERIODICITY; PULSES; REFLECTIVITY; SEMICONDUCTOR MATERIALS; SILICON; SURFACES; TIME DEPENDENCE