Subnanosecond-laser-induced periodic surface structures on prescratched silicon substrate

Motoharu Hongo, Shigeki Matsuo

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Abstract

Laser-induced periodic surface structures (LIPSS) were fabricated on a prescratched silicon surface by irradiation with subnanosecond laser pulses. Low-spatial-frequency LIPSS (LSFL) were observed in the central and peripheral regions; both had a period Λ close to the laser wavelength λ, and the wavevector orientation was parallel to the electric field of the laser beam. The LSFL in the peripheral region seemed to be growing, that is, expanding in length with increasing number of pulses, into the outer regions. In addition, high-spatial-frequency LIPSS, λ ≲ λ =2, were found along the scratches, and their wavevector orientation was parallel to the scratches.

Original languageEnglish
Article number062703
JournalApplied Physics Express
Volume9
Issue number6
DOIs
Publication statusPublished - 2016 Jun 1

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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