Abstract

Photoluminescent (PL) properties related to ${\mathrm{Te}}^{4+}$ species in zinc borate glasses are examined. Broad emission was observed by the excitation of the PL excitation peak of ${\mathrm{Te}}^{4+}$ present at the optical absorption edge. The emission intensity of ${\mathrm{Te}}^{4+}$ in $5{\mathrm{TeO}}_2–50\mathrm{ZnO}–45{\mathrm{B}}_2{\mathrm{O}}_3$ glass was thermally quenched in a temperature region over 100 K, suggesting that concentration quenching preferentially occurred. The lifetime of the emission was approximately 2.5 μs, which is characteristic of relaxation from the triplet excitation state of an ${\mathrm{ns}}^2$-type center.

© 2013 Optical Society of America

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