Optical and dielectric properties of Sr3NbGa3Si2O14 crystals

Refractive indices of Sr3NbGa3Si2O14 (SNGS) crystal were determined in the wavelength region between 0.365 and 0.7065 μm. While phase-matched optical second harmonic generation is impossible for SNGS crystal. Temperature-dependent examination of the dielectric properties and dielectric loss of Y-cut crystal wafer were studied in the temperature range from 298.15 to 873.15 K. The frequency dependence on the dielectric loss in the frequency range from 10 Hz to 13 MHz was also measured.