Open AccessAnalysis on the electric field distribution in a relaxor ferroelectric KTN crystal near field-induced phase transition using optical deflection measurements
Author(s) -
Chang Jiang Chen,
Ju Hung Chao,
Yun G.O.O. Lee,
Annan Shang,
Ruijia Liu,
Stuart Yin,
Robert C. Hoffman
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.400542
Subject(s) - electric field , materials science , ferroelectricity , tantalate , optics , permittivity , lithium tantalate , dielectric , phase transition , condensed matter physics , deflection (physics) , lithium niobate , optoelectronics , physics , quantum mechanics
Spatially analyzing non-uniform distributions of electric phenomena such as electric field and permittivity in ferroelectric devices is very challenging. In this study, we apply an optical beam deflection method to map the non-uniform electric phenomena in relaxor ferroelectric potassium tantalate niobate (KTN) crystals. To adequately correlate the physical parameters and their spatial distributions in KTN crystals, a general model that describes the giant electro-optic response and associated beam deflection is derived. The proposed model is in good agreement with the experimental results and is envisioned to be useful for analyzing electric field-induced phenomena in non-linear dielectric materials and devices.