Optical transmission in undoped crystalline α-Al2O3 grown by several techniques
- 1 October 1991
- journal article
- letter
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 70 (7) , 3995-3997
- https://doi.org/10.1063/1.349169
Abstract
Transmission spectra from 1.5 to 8.8 eV of undoped crystalline α‐Al2O3 synthesized by five growth techniques are compared. Salient features in this below‐band‐gap region are attributed to extrinsic effects of absorption by impurities and color centers, and to Rayleigh scattering. Analysis suggests material with substantially less absorption is possible.This publication has 22 references indexed in Scilit:
- Room-temperature optical absorption in undoped α-Al2O3Journal of Applied Physics, 1990
- Effects of Chemical Inhomogeneities on Grain Growth and Microstructure in Al2O3Journal of the American Ceramic Society, 1989
- Magnetic and optical measurements on Ti:Al2O3 crystals for laser applications: Concentration and absorption cross section of Ti3+ ionsApplied Physics Letters, 1986
- EFG, the invention and application to sapphire growthJournal of Crystal Growth, 1980
- Toward a Unified Theory of Urbach's Rule and Exponential Absorption EdgesPhysical Review B, 1972
- Growth of Sapphire Disks from the Melt by a Gradient Furnace TechniqueJournal of the American Ceramic Society, 1970
- Interpretation of Urbach's RulePhysical Review Letters, 1967
- Single-crystal growth of sapphireJournal of Materials Science, 1967
- Refraction and Dispersion of Synthetic SapphireJournal of the Optical Society of America, 1962
- Optical Spectra of Transition-Metal Ions in CorundumThe Journal of Chemical Physics, 1962