Wavelength dependence of Verdet constant of Tb~(3+): Y_2O_3 ceramics

摘要

Samples of the magneto-active material-Tb~(3+):Y_2O_3 ceramics with Tb~(3+) ion concentrations of 10%, 20%, 30%, and 100% (Tb_2O_3)-were prepared and studied. The wavelength dependence of Verdet constant in the 380nm-1750nm range was approximated for all investigated ceramic samples and was predicted for a pure Tb_2O_3 material. Tb_2O_3 ceramics demonstrates a more than three times higher Verdet constant in comparison with terbium gallium garnet crystal or ceramics. The linear dependence of the Verdet constant on Tb~(3+) ion concentration in the Tb~(3+):Y_2O_3 ceramics was demonstrated. The obtained data will be useful for fabricating magneto-optical elements of Faraday devices based on Tb~(3+):Y_2O_3 with arbitrary Tb~(3+) ion concentration operating at room temperature in the wavelength range of 380nm-1750nm.