Ordered nano-scale domains in lithium niobate single crystals via phase-mask assisted all-optical poling

I. T. Wellington, C. E. Valdivia, T. J. Sono, C. L. Sones, S. Mailis, R. W. Eason

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We report the formation of directionally ordered nano-scale surface domains on the +z face of undoped congruent lithium niobate single crystals by using UV illumination through a phase mask of sub-micron periodicity with an energy fluence between ∼90 mJ/cm 2 and 150 mJ/cm 2 at λ = 266 nm. We clearly show here that the UV-induced surface ferroelectric domains only nucleate at and propagate along maxima of laser intensity. Although the domain line separation varies and is greater than 2 μm for this set of experimental conditions, this enables a degree of control over the all-optical poling process.

Original languageEnglish
Pages (from-to)4215-4219
Number of pages5
JournalApplied Surface Science
Volume253
Issue number9
DOIs
Publication statusPublished - 28 Feb 2007
Externally publishedYes

Keywords

  • Chemical etching
  • Ferroelectric domain inversion
  • Lithium niobate

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