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Published on: November 21, 2019
Study on the Structural, Optical, and Magneto-Optical Properties of Bi2O3-Pb3(BO3)2-Ga2O3-PbO Glasses for
Rui Wan1,2, Chen Guo1,2, Hang Jiang3
1State Key Laboratory of Ultrafast Optical Science and Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an 710119, China.
Abstract:
In this work, bismuthate glasses with compositions of 64Bi2O3-(25-x)Pb3(BO3)2-11Ga2O3-xPbO (where x = 2, 7, 12, 17) were prepared by the melt-quenching method, and their density, thermodynamic stability, Raman spectra, X-ray photoelectron spectra, Verdet constant, and nanosecond laser-induced damage threshold (LIDT) were characterized. As the content of PbO increases, the thermodynamic stability and laser-induced damage threshold of the glass gradually decrease, which corresponds to the increase in the glass's optical basicity, the rise in non-bridging oxygen content, and the valence state transition of Bi ions observed in structural studies. A relatively large Verdet constant was obtained in the glass with the composition of 64Bi2O3-8Pb3(BO3)2-11Ga2O3-17PbO, with a value of -0.191 min·G-1·cm-1 at a wavelength of 633 nm, which is much larger than that of commercially diamagnetic glasses. In addition, the variation in the Verdet constant at 1064 nm between 20 and 80 °C is less than 0.4 × 10-5 K-1, which indicates that these bismuthate glasses are good candidates for magneto-optical devices under thermally unstable conditions.
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