title: Optimization of electrooptic and pieozoelectric coupling effects in tetragonal relaxor-PT ferroelectric single crystals.
abstract: The electrooptic and piezoelectric coupling effects in tetragonal relaxor-based ferroelectric 0.62Pb(Mg1/3Nb2/3)O3-0.38PbTiO3(PMN-0.38PT) and 0.88Pb(Zn1/3Nb2/3)O3-0.12PbTiO3(PZN-0.12PT) single-domain crystals have been analyzed by the coordinate transformation. The orientation dependence of the electrooptic and half-wave voltage was calculated based on the full sets of refractive indices, electrooptic and piezoelectric coefficients. The optimum orientation cuts for achieving the best electrooptic coefficient and half-wave voltage were found. The lowset half-wave voltage is only 76 V for the PMN-0.38PT single-domain crystal. Compared to commonly used electrooptic crystal LiNbO3, tetragonal relaxor-PT ferroelectric single-domain crystals are much superior for optical modulation applications because of their much higher linear electrooptic coefficients and substantially lower half-wave voltages when the piezoelectric strain influence is considered.
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Enwei
authors.initials: E
authors.lastname: Sun
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Shijing
authors.initials: S
authors.lastname: Sang
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Zhongyuan
authors.initials: Z
authors.lastname: Yuan
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Xudong
authors.initials: X
authors.lastname: Qi
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China ; Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Wenwu
authors.initials: W
authors.lastname: Cao
keywords: Electrooptic; PMN-PT; PZN-PT; coupling effect; piezoelectric