Generation of annularly symmetric periodic ferroelectric domains in Nd doped near stoichiometric LiTaO<sub>3</sub> crystals by the vapor transport equilibration processing期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

Authors:	C.C. WuR.K. Choubey C.W. Lan

Affiliation:	^a Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan ^b Department of Applied Physics, Birla Institute of Technology, Mesra, Ranchi-835 215, India

Abstract:	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 0.5 mol% Nd doped stoichiometric LiTaO₃ crystal was found to be about 70 μm, 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 ⁴I_9/2 ground state of Nd³⁺ ions, indicating its potential in the self-lasing quasi-phase matching (QPM) applications.

Keywords:	Ferroelectrics Optical materials and properties Crystal growth
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