Abstract
The piezooptical (PO) parameters of the ferroelectric crystal Sn 2 P 2 S 6 with monoclinic symmetry are measured by an interferometric technique for the mechanical stress applied parallel to the three main crystallographic axes at light wavelength λ = 632.8 nm and room temperature (T = 293 K). Nine independent PO coefficients are determined experimentally. They exhibit quite large values: the largest measured component is π 11 = 15.6 pm N. The high PO coefficients presume potential applications of Sn 2 P 2 S 6 as high-efficient acousto-optic material.
Acknowledgment
Some of the authors (O.M., I.M.-L. and R.V.) acknowledge financial support of this study from the Ministry of Education and Science of Ukraine (the Project N0106U000616).