Generation of annularly symmetric periodic ferroelectric domains in Nd doped near stoichiometric LiTaO₃ crystals by the vapor transport equilibration processing

Annually symmetric periodic ferroelectric domain and near stoichiometry have been generated simultaneously from Nd-doped congruent LiTaO₃ crystals by using the vapor transport equilibration (VTE) processing for the first time. The periodic width in the domain structure of 0.5mol% Nd doped stoichiome...

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Bibliographic Details
Published in:Materials letters 2012-01, Vol.67 (1), p.88-90
Main Authors: Wu, C.C, Choubey, R.K, Lan, C.W
Format: Article
Language:English
Subjects:
absorption
Balancing
Crystal structure
Crystals
Ferroelectric domains
ions
Neodymium
Spectra
Stoichiometry
Transport
vapors
wavelengths
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Summary:Annually symmetric periodic ferroelectric domain and near stoichiometry have been generated simultaneously from Nd-doped congruent LiTaO₃ crystals by using the vapor transport equilibration (VTE) processing for the first time. The periodic width in the domain structure of 0.5mol% Nd doped stoichiometric LiTaO₃ crystal was found to be about 70μm, and the wavelength decreased with the increasing Nd concentration. It can be noticed by transmission spectra that VTE treated LT crystals shows blue shift as compared to congruent LT crystals. Also, various absorption bands were observed in Nd-doped LiTaO₃ crystals corresponding to the transitions from ⁴I₉/₂ ground state of Nd³⁺ ions, indicating its potential in the self-lasing quasi-phase matching (QPM) applications.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2011.09.014