On the near-infrared luminescence from TeO2 containing borate glasses

Sasithorn KHONTHON; Penprapa PUNPAI; Shigeki MORIMOTO; Yusuke ARAI; Takenobu SUZUKI; Yasutake OHISHI

doi:10.2109/jcersj2.116.829

Technical reports

On the near-infrared luminescence from TeO₂ containing borate glasses

Sasithorn KHONTHON, Penprapa PUNPAI, Shigeki MORIMOTO, Yusuke ARAI, Takenobu SUZUKI, Yasutake OHISHI

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Keywords: Tellurium, Borate glass, Color center, NIR luminescence, Clusters

JOURNAL FREE ACCESS

2008 Volume 116 Issue 1355 Pages 829-831

DOI https://doi.org/10.2109/jcersj2.116.829

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Abstract

The effects of melting temperature and glass composition on the Near-infrared (NIR) luminescent characteristics of Te-containing borate glasses are investigated and compared with previous works. Three absorption bands are detected at around ~370 nm, ~430 nm and ~530 nm, however, the absorption band at around ~600 nm could not be detected in all borate glasses. And no NIR luminescence was observed under the excitation of a 974 nm laser diode. The NIR luminescence was observed in Te-green and Te-purple glasses, which showed the absorption band at around ~600 nm. This absorption band was ascribed to ²Πg → ²Πu transition of Te₂^-. Consequently, it is suggested that the origin of NIR luminescence of Te-containing green and purple glass is likely to be caused by Te₂^- center. (Not to sure of the meaning of this sentence...)

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