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UV laser induced surface microstructures in congruent lithium niobate single crystals

UV laser induced surface microstructures in congruent lithium niobate single crystals
UV laser induced surface microstructures in congruent lithium niobate single crystals
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.
Mailis, Sakellaris
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Sones, Collin
9de9d8ee-d394-46a5-80b7-e341c0eed0a8
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Mailis, Sakellaris
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Sones, Collin
9de9d8ee-d394-46a5-80b7-e341c0eed0a8
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020

Mailis, Sakellaris, Sones, Collin and Eason, R.W. (2004) UV laser induced surface microstructures in congruent lithium niobate single crystals. E-MRS 2004. 24 - 28 May 2004. 18 pp .

Record type: Conference or Workshop Item (Other)

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.

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e-pub ahead of print date: 2004
Venue - Dates: E-MRS 2004, 2004-05-24 - 2004-05-28

Identifiers

Local EPrints ID: 41738
URI: https://eprints.soton.ac.uk/id/eprint/41738
PURE UUID: 891721f3-9859-48f6-ae05-a8b980d6ce28
ORCID for Sakellaris Mailis: ORCID iD orcid.org/0000-0001-8100-2670
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 18 Oct 2006
Last modified: 06 Jun 2018 13:13

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