Investigating of SRS and luminescence of ZnWO4 crystals

Abstract

The stimulated Raman scattering (SRS) and luminescence spectra of ZnWO4 crystals were investigated using 532nm laser excitation at room temperature. It was found that the first order (558.7nm) and second order (588.6nm) of SRS have 130 and 77cm－1 line widths and the pump threshold at 558.7nm is 6.8mJ. The luminescence spectrum of ZnWO4 crystals under 532nm laser excitation has the peculiarity of having the band structure composed of three-Gaussian components. The photoluminescence spectrum shows broadband emission from 400nm to 650nm peaked about 472.0nm, which is attributed to the radiative transitions between tungsten and oxygen.