# Browse College of Engineering by Contributor "Stephen G. Bishop"

• (1997)
Photoluminescence characterization has discovered a novel broad bands excitation effect in rare earth-doped chalcogenide glasses. Photoluminescence excitation (PLE) bands with a width of $\sim$450 nm have been observed ...

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• (1999)
Photoluminescence was used to measure the bandgap of GaN as a function of temperature in the range 2--811 K, and the results were fitted to Varshni's empirical formula to obtain an expression for the dependence of the ...

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• (1998)
Reliability and stability issues have, for the first time, been studied in this materials system. Preferred regimes of operation are defined, and accelerated aging studies are used to predict device lifetimes.

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