Dielectric and optical properties of Bi12SiO20 crystals doped with Zn and Cd and Co-doped with P

Abstract Single crystals of Bi 12 SiO 20 (BSO) Zn- and Cd-doped and co-doped with P were grown by the Czochralski technique and segregation coefficients were determined. The dielectric permeability e and dielectric loss tan δ were measured at room temperature in two frequency ranges: 10 3 –10 7 and 10 3 –10 5 Hz. Dopants were found to decrease the dielectric permeability in the whole frequency range and P, Zn+P and Cd+P doping increased dielectric loss in the frequency range 10 3 –10 5 Hz. Transmission and reflection spectra were taken in the range 0.38–0.85 μm and absorption was calculated. P, Zn+P and Cd+P doping shifted transmission spectra to the shorter wavelengths and drastically reduced the transmission shoulder region as well as the absorption coefficients.