Nanoscale surface domain formation on the +z face of lithium niobate by pulsed ultraviolet laser illumination

C. E. Valdivia, C. L. Sones, J. G. Scott, S. Mailis, R. W. Eason, D. A. Scrymgeour, V. Gopalan, T. Jungk, E. Soergel, I. Clark

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Abstract

Single-crystal congruent lithium niobate samples have been illuminated on the +z crystal face by pulsed ultraviolet laser wavelengths below (248 nm) and around (298-329 nm) the absorption edge. Following exposure, etching with hydrofluoric acid reveals highly regular precise domain-like features of widths ~150-300 nm, exhibiting distinct three-fold symmetry. Examination of illuminated unetched areas by scanning force microscopy shows a corresponding contrast in piezoelectric response. These observations indicate the formation of nanoscale ferroelectric surface domains, whose depth has been measured via focused ion beam milling to be ~2 μm. We envisage this direct optical poling technique as a viable route to precision domain-engineered structures for waveguide and other surface applications.

Original languageEnglish (US)
Article number022906
Pages (from-to)022906-1-022906-3
JournalApplied Physics Letters
Volume86
Issue number2
DOIs
StatePublished - Jan 10 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Valdivia, C. E., Sones, C. L., Scott, J. G., Mailis, S., Eason, R. W., Scrymgeour, D. A., Gopalan, V., Jungk, T., Soergel, E., & Clark, I. (2005). Nanoscale surface domain formation on the +z face of lithium niobate by pulsed ultraviolet laser illumination. Applied Physics Letters, 86(2), 022906-1-022906-3. [022906]. https://doi.org/10.1063/1.1849414