Nanoscale surface domain formation on the +z face of lithium niobate by pulsed UV laser illumination
Nanoscale surface domain formation on the +z face of lithium niobate by pulsed UV laser illumination
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 micron. We envisage this direct optical poling technique as a viable route to precision domain-engineered structures for waveguide and other surface applications.
022906_1-022906_3
Valdivia, C.E.
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Sones, C.L.
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Scott, J.G.
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Mailis, S.
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Eason, R.W.
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Scrymgeour, D.A.
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Gopalan, V.
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Jungk, T.
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Soergel, E.
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Clark, I.
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2005
Valdivia, C.E.
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Sones, C.L.
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Scott, J.G.
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Mailis, S.
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Eason, R.W.
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Scrymgeour, D.A.
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Gopalan, V.
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Jungk, T.
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Soergel, E.
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Clark, I.
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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. and Clark, I.
(2005)
Nanoscale surface domain formation on the +z face of lithium niobate by pulsed UV laser illumination.
Applied Physics Letters, 86 (2), .
(doi:10.1063/1.1849414).
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 micron. We envisage this direct optical poling technique as a viable route to precision domain-engineered structures for waveguide and other surface applications.
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Published date: 2005
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Local EPrints ID: 16073
URI: http://eprints.soton.ac.uk/id/eprint/16073
ISSN: 0003-6951
PURE UUID: 9bd38c27-1ac4-49aa-b646-53c55d6887c7
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Date deposited: 23 Jun 2005
Last modified: 16 Mar 2024 02:38
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Author:
C.E. Valdivia
Author:
J.G. Scott
Author:
S. Mailis
Author:
D.A. Scrymgeour
Author:
V. Gopalan
Author:
T. Jungk
Author:
E. Soergel
Author:
I. Clark
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