Pyroelectric field assisted ion migration induced by ultraviolet laser irradiation and its impact on ferroelectric domain inversion in lithium niobate crystals
Pyroelectric field assisted ion migration induced by ultraviolet laser irradiation and its impact on ferroelectric domain inversion in lithium niobate crystals
The impact of UV laser irradiation on the distribution of lithium ions in ferroelectric lithium niobate single crystals has been numerically modelled. Strongly absorbed UV radiation at wavelengths of 244–305nm produces steep temperature gradients which cause lithium ions to migrate and result in a local variation of the lithium concentration. In addition to the diffusion, here the pyroelectric effect is also taken into account which predicts a complex distribution of lithium concentration along the c-axis of the crystal: two separated lithium deficient regions on the surface and in depth. The modelling on the local lithium concentration and the subsequent variation of the coercive field are used to explain experimental results on the domain inversion of such UV treated lithium niobate crystals.
1-16
Ying, C.Y.J.
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Daniell, G.J.
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Steigerwald, H.
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Soergel, E.
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Mailis, S.
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28 August 2013
Ying, C.Y.J.
1cc13d62-ee04-4ca3-b0b8-e60a523dc145
Daniell, G.J.
82c59eea-5002-4889-8823-2c6e5b3288d3
Steigerwald, H.
f5c7bc7e-a0db-4714-b2f0-1debd45b81be
Soergel, E.
f4d5aad1-9f81-4877-bceb-33ceed99d9d7
Mailis, S.
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Ying, C.Y.J., Daniell, G.J., Steigerwald, H., Soergel, E. and Mailis, S.
(2013)
Pyroelectric field assisted ion migration induced by ultraviolet laser irradiation and its impact on ferroelectric domain inversion in lithium niobate crystals.
Journal of Applied Physics, 114 (8), , [83101].
(doi:10.1063/1.4818828).
Abstract
The impact of UV laser irradiation on the distribution of lithium ions in ferroelectric lithium niobate single crystals has been numerically modelled. Strongly absorbed UV radiation at wavelengths of 244–305nm produces steep temperature gradients which cause lithium ions to migrate and result in a local variation of the lithium concentration. In addition to the diffusion, here the pyroelectric effect is also taken into account which predicts a complex distribution of lithium concentration along the c-axis of the crystal: two separated lithium deficient regions on the surface and in depth. The modelling on the local lithium concentration and the subsequent variation of the coercive field are used to explain experimental results on the domain inversion of such UV treated lithium niobate crystals.
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Published date: 28 August 2013
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 359705
URI: http://eprints.soton.ac.uk/id/eprint/359705
ISSN: 0021-8979
PURE UUID: 786b47e7-d8da-44f3-8eac-482379dd94b3
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Date deposited: 11 Nov 2013 08:41
Last modified: 14 Mar 2024 15:27
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Author:
C.Y.J. Ying
Author:
G.J. Daniell
Author:
H. Steigerwald
Author:
E. Soergel
Author:
S. Mailis
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