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Optical anisotropy and EO properties of ferroelectrics TGS and LHP single crystals using a HAUP technique

Published online by Cambridge University Press:  15 March 2002

C. Hernández-Rodríguez ,
R. Guerrero-Lemus  and
J. Herreros-Cedrés
C. Hernández-Rodríguez*
Affiliation:
Departamento de Física Básica, Facultad de Física, Universidad de La Laguna, Avda. Francisco Sánchez s/n°, 38206 La Laguna, Tenerife, Spain
R. Guerrero-Lemus
Affiliation:
Departamento de Física Básica, Facultad de Física, Universidad de La Laguna, Avda. Francisco Sánchez s/n°, 38206 La Laguna, Tenerife, Spain
J. Herreros-Cedrés
Affiliation:
Departamento de Física Básica, Facultad de Física, Universidad de La Laguna, Avda. Francisco Sánchez s/n°, 38206 La Laguna, Tenerife, Spain
*
chdezr@ull.es
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Abstract

Triglycine sulphate, $(\rm NH_2CH_2CO_2H)_3\cdot H_2SO_4$ (TGS), is a ferroelectric crystal widely used in optical properties studies, phase transitions theory as well as test for experimental techniques. Lead monohydrogen phosphate, PbHPO4 (LHP), is a typical representative of the family of ferroelectric schultenites, suitable in testing microscopic theories of ferroelectricity. In this work the so-called high-accuracy universal polarimeter (HAUP) has been used to determine the natural anisotropy in the birefringent crystalline sections (010), obtaining the temperature dependence of optical anisotropy magnitudes of the crystal: gyrotropy, birefringence and optical indicatrix rotation. Our HAUP technique also permits to investigate the electro-optic (EO) coefficients associated to the phases above and below phase transition temperatures.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 17 , Issue 3 , March 2002 , pp. 189 - 200
Copyright
© EDP Sciences, 2002

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