Optical Absorption and Vacuum-Ultraviolet Reflectance of GaN Thin Films
- 22 June 1970
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 24 (25) , 1421-1423
- https://doi.org/10.1103/physrevlett.24.1421
Abstract
Optical absorption of GaN thin films shows previously unreported structure at 3.8 eV, which is interpreted as the excitonic "knee" due to transitions across the fundamental direct energy gap previously thought to occur at an energy of about 3.4 eV. We also give the first report of the specular reflectance of GaN; peaks were observed at 6.8, 9.5, and 10.7 eV.Keywords
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