The University of Southampton
University of Southampton Institutional Repository

Origin of UV-induced poling inhibition in lithium niobate crystals

Origin of UV-induced poling inhibition in lithium niobate crystals
Origin of UV-induced poling inhibition in lithium niobate crystals
Short-term exposure of the +z face of LiNbO3 crystals to focused UV laser light leads to persistent inhibition of ferroelectric domain reversal at the irradiated area, a phenomenon referred to as "poling inhibition." Different types of crystals (stoichiometric, congruent, or Mg-doped ones) are exposed, creating the so-called "latent state" and domain growth during subsequent electric-field poling is visualized. The latent state is robust against thermal annealing up to 250 °C and uniform illumination. With the tip of a scanning force microscope the coercive field is mapped, showing not only the expected resistance against domain reversal in the UV-irradiated region but also easier poling adjacent to the UV-irradiated section. These results and theoretical estimates point to the following mechanism of poling inhibition: the UV light-induced heating results in a local reduction of the lithium concentration, via thermodiffusion. The required charge compensation is provided by UV-excited free electrons/holes. After cooling, the lithium ions become immobile, and the reduced lithium concentration causes a strong local increase in the coercive field in the exposed area, while the increased Li concentration next to this area reduces the coercive field.
1550-235X
214105-[6pp]
Steigerwald, H.
f5c7bc7e-a0db-4714-b2f0-1debd45b81be
Lilienblum, M.
4c84cf47-c9b1-471d-8ad5-72af67e2dea0
von Cube, F.
a3fcbc0c-37ef-4144-b179-b11ac98c0d5b
Ying, Y.J.
2c3970f7-93df-4812-b01f-6fe6aed82e92
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Mailis, S.
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Sturman, B.
f174421b-f538-4ee4-9f7d-64f9fe27e08d
Soergel, E.
f4d5aad1-9f81-4877-bceb-33ceed99d9d7
Buse, K.
ff6d2cb7-0e78-4382-adf0-239667447431
Steigerwald, H.
f5c7bc7e-a0db-4714-b2f0-1debd45b81be
Lilienblum, M.
4c84cf47-c9b1-471d-8ad5-72af67e2dea0
von Cube, F.
a3fcbc0c-37ef-4144-b179-b11ac98c0d5b
Ying, Y.J.
2c3970f7-93df-4812-b01f-6fe6aed82e92
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Mailis, S.
233e0768-3f8d-430e-8fdf-92e6f4f6a0c4
Sturman, B.
f174421b-f538-4ee4-9f7d-64f9fe27e08d
Soergel, E.
f4d5aad1-9f81-4877-bceb-33ceed99d9d7
Buse, K.
ff6d2cb7-0e78-4382-adf0-239667447431

Steigerwald, H., Lilienblum, M., von Cube, F., Ying, Y.J., Eason, R.W., Mailis, S., Sturman, B., Soergel, E. and Buse, K. (2010) Origin of UV-induced poling inhibition in lithium niobate crystals. Physical Review B, 82 (21), 214105-[6pp]. (doi:10.1103/PhysRevB.82.214105).

Record type: Article

Abstract

Short-term exposure of the +z face of LiNbO3 crystals to focused UV laser light leads to persistent inhibition of ferroelectric domain reversal at the irradiated area, a phenomenon referred to as "poling inhibition." Different types of crystals (stoichiometric, congruent, or Mg-doped ones) are exposed, creating the so-called "latent state" and domain growth during subsequent electric-field poling is visualized. The latent state is robust against thermal annealing up to 250 °C and uniform illumination. With the tip of a scanning force microscope the coercive field is mapped, showing not only the expected resistance against domain reversal in the UV-irradiated region but also easier poling adjacent to the UV-irradiated section. These results and theoretical estimates point to the following mechanism of poling inhibition: the UV light-induced heating results in a local reduction of the lithium concentration, via thermodiffusion. The required charge compensation is provided by UV-excited free electrons/holes. After cooling, the lithium ions become immobile, and the reduced lithium concentration causes a strong local increase in the coercive field in the exposed area, while the increased Li concentration next to this area reduces the coercive field.

Full text not available from this repository.

More information

Published date: December 2010

Identifiers

Local EPrints ID: 177065
URI: https://eprints.soton.ac.uk/id/eprint/177065
ISSN: 1550-235X
PURE UUID: 3a2743ac-1de8-4927-a991-d23822925d1a
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204
ORCID for S. Mailis: ORCID iD orcid.org/0000-0001-8100-2670

Catalogue record

Date deposited: 15 Mar 2011 09:06
Last modified: 17 Jul 2019 01:20

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×