UV laser-induced ordered surface nanostructures in congruent lithium niobate single crystals

S. Mailis, C. L. Sones, J. G. Scott, R. W. Eason

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)

Abstract

Ultra violet illumination of the -z face of lithium niobate single crystals, under specific conditions, results in an organized arrangement of submicron etch resistant features that reflect the illuminating intensity distribution. Consequently, spatially resolved illumination can produce periodic structures with submicron periodicity. Furthermore, a size self-adjustment of the submicron etch resistant features was observed which is related to characteristic lengths (e.g. grating period) of the overall structure. The effect occurs for a narrow range of illuminating intensities and is attributed to a photo-induced electrostatic charge distribution, which modifies the electrochemical interaction of the acid with the surface. The size and periodicity of the structures, which can be achieved with this method, are suitable for the fabrication of 2D photonic crystal structures in this electro-optically tunable material.

Original languageEnglish
Pages (from-to)497-503
Number of pages7
JournalApplied Surface Science
Volume247
Issue number1-4
DOIs
Publication statusPublished - 15 Jul 2005
Externally publishedYes
EventProceedings of the European Materials Research Society 2004 - Symposium N EMRS-2004 -
Duration: 24 May 200428 May 2004

Keywords

  • Laser-induced
  • Lithium niobate
  • Nanostructure
  • Submicron

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