Optical properties of MoO3 containing tellurite glasses

It was observed that P2O5 generates TeO5+delta groups in tellurite glasses that have a profound influence on their optical properties. The presence of TeO5+delta groups in phosphotellurite glass made MoO3 behave in a different way compared to other tellurite glass systems that do not contain P2O5. The refractive index measurements and Raman spectroscopy were combined to show that the addition of MoO3 in a phosphotellurite glass generates TeO3+1 polyhedron, whereas it generates TeO3 trigonal bipyramids in other glass systems. The MoO3 system showed absorption bands corresponding to Mo5+ ion in phosphotellurite glasses, whereas no similar bands were observed for other glasses. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2976133]