Souza Junior, Joao B.
Reyna, Albert S.
Silva Neto, Manoel L.
Bautista, Jessica E. Q.
Ribeiro, Sidney J. L.
de Araujo, Cid B.
Total Authors: 7
 Univ Sao Paulo, Sao Carlos Inst Chem, IQSC, Sao Carlos, SP - Brazil
 Univ Fed Rural Pernambuco, UACSA, Cabo De Santo Agostinho, PE - Brazil
 Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE - Brazil
 Sao Paulo State Univ UNESP, Inst Chem, Araraquara, SP - Brazil
Total Affiliations: 4
MAY 14 2019.
Web of Science Citations:
Phosphotellurite based glasses have interesting features such as low characteristic temperatures, high glass forming ability, high thermal stability against crystallization and a broad transparency window from ultraviolet (UV) to near-infrared (NIR), which makes them promising materials for photonic applications. In this work, phosphotellurite binary glasses, having a composition (100 - x)TeO2 - xBa(PO3)(2) with x varying from 1 to 20 mol%, were synthesized by the conventional melt-quenching method in covered gold crucibles under air. Optical, physical and structural properties of the new glass samples were investigated by differential scanning calorimetry, X-ray diffraction, Raman spectroscopy, transmission electron microscopy, linear optical absorption from UV to NIR, IR transmittance, and optical limiting experiments. Transparent glass-ceramics in the visible range were obtained for phosphotellurite samples containing 2, 4 and 6 mol% of Ba(PO3)(2) and the phase crystallization was investigated through Rietveld analysis and transmission electron microscopy. The incorporation of Ba(PO3)(2) into the TeO2 network drastically increases the thermal stability against devitrification and helps to shift the infrared multiphonon absorption edge to longer wavelengths. Nonlinear measurements performed with a picosecond laser at 532 nm indicate large effective nonlinear absorption coefficients for all samples. In summary, the dependence of the spectroscopic properties on the compositions of the samples revealed promising transparent glass and glass-ceramics for photonic applications. (AU)