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Photo-Induced Effect in Heavy Metal Oxide Glasses

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Photo-induced phenomena in binary (PbO–Ga2O3) and ternary (PbO–Bi2O3–Ga2O3) heavy metal oxide glasses were investigated. A red shift up to ∼0.05 eV in the absorption edge of 75PbO–25Ga2O3 glass (mol%) was observed by illuminating the subbandgap light for 30 min. This shift was completely erased by the heat treatment near the glass transition temperature. Refractive index of the glass at 600 nm also increased ∼0.011 by the illumination. It is believed that the presence of lone-pair electrons associated with Pb-polyhedra is essential to realize a reversible photo-induced effect in these oxide glasses.
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Document Type: Research Article

Affiliations: Department of Materials Science and Engineering, Center for Information Materials, Pohang University of Science and Technology (POSTECH), Gyeongbuk 790-784, Korea

Publication date: 2010-04-01

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