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Title: Polarization dependent formation of femtosecond laser-induced periodic surface structures near stepped features

Laser-induced periodic surface structures (LIPSS) are formed near 110 nm-tall Au microstructured edges on Si substrates after single-pulse femtosecond irradiation with a 150 fs pulse centered near a 780 nm wavelength. We investigate the contributions of Fresnel diffraction from step-edges and surface plasmon polariton (SPP) excitation to LIPSS formation on Au and Si surfaces. For certain laser polarization vector orientations, LIPSS formation is dominated by SPP excitation; however, when SPP excitation is minimized, Fresnel diffraction dominates. The LIPSS orientation and period distributions are shown to depend on which mechanism is activated. These results support previous observations of the laser polarization vector influencing LIPSS formation on bulk surfaces.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109 (United States)
  2. Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States)
  3. Sandia National Laboratories, Albuquerque, New Mexico 87123 (United States)
  4. Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)
Publication Date:
OSTI Identifier:
22299998
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DIFFRACTION; DISTRIBUTION; EXCITATION; GOLD; IRRADIATION; LASER RADIATION; MICROSTRUCTURE; PERIODICITY; POLARIZATION; SILICON; SUBSTRATES; SURFACES; WAVELENGTHS