1 June 1993 Vacuum-ultraviolet characterization of sapphire, ALON, and spinel near the band gap
Author Affiliations +
Optical Engineering, 32(6), (1993). doi:10.1117/12.135837
Abstract
Ultraviolet optical properties near the edge of transparency (just above and below the band gap) of polycrystalline ALON (aluminum oxynitride, Al23O27N5) and spinel are not well characterized. The edge of transparency is commonly found to obey Urbach's rule, and this is the case for single-crystal sapphire and polycrystalline ALON and spinel as well. Room-temperature transmission and reflection measurements are made from 2500 to 1150 Å on these materials and the corresponding absorption coefficient at the band gap is represented by Urbach's rule.
Michael E. Thomas, William J. Tropf, Summer L. Gilbert, "Vacuum-ultraviolet characterization of sapphire, ALON, and spinel near the band gap," Optical Engineering 32(6), (1 June 1993). https://doi.org/10.1117/12.135837
JOURNAL ARTICLE
4 PAGES


SHARE
RELATED CONTENT

Emissivity of a uniaxial crystalline slab
Proceedings of SPIE (July 26 1999)
Spinel: where did it go?
Proceedings of SPIE (November 01 1997)
Fused silica for 157-nm transmittance
Proceedings of SPIE (June 25 1999)

Back to Top