Evolution of femtosecond laser-induced surface ripples on lithium niobate crystal surfaces

Hisashi Shimizu, Go Obara, Mitsuhiro Terakawa, Eric Mazur, Minoru Obara

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We fabricated periodic ripple structures on the surface of a lithium niobate crystal by irradiation with femtosecond laser pulses and observed the evolution of these structures under irradiation with successive laser pulses. After just a few laser pulses we observed nanorod-shaped craters, aligned with each other but randomly distributed over the surface. The nanocraters are caused by nanoablation at defects in the crystal surface. With increasing pulse number, side-lobed nanocraters appear and light scattered from the initial nanorod-shaped craters at the crystal surface interferes with the incident light, causing the formation of periodic structures.

Original languageEnglish
Article number112701
JournalApplied Physics Express
Volume6
Issue number11
DOIs
Publication statusPublished - 2013 Nov

ASJC Scopus subject areas

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

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