Luminescence properties of deformed CaO crystals

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.4910· OSTI ID:6669973

Gonzalez, R ^[1]; Chen, Y; Ballesteros, C ^[2]; Liu, H; Williams, Jr, G P; Rosenblatt, G H; Williams, R T ^[3]; Gellermann, W ^[4]

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1. Departamento de Ingenieria, Escuela Politecnica Superior, Universidad Carlos III, 28913 Leganes Madrid (Spain) Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6031 (United States)
2. Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6031 (United States)
3. Department of Physics, Wake Forest University, Winston-Salem, North Carolina 27109 (United States)
4. Department of Physics, University of Utah, Salt Lake City, Utah 84112 (United States)

In deformed CaO crystals, the predominant optical-absorption band at 270 nm and the corresponding luminescence band at 450 nm have been investigated. The absorption coefficient increases linearly with deformation up to [similar to]5% whereas the luminescence intensity saturates earlier. Thermal annealing indicates that appreciable decrease in the absorption begins at [similar to]600 K. In contrast, the luminescence intensity diminishes very rapidly at temperatures not much above room temperature. Time-resolved luminescence indicates that the 450-nm band is composed of two bands: a 475-nm band with lifetimes of [lt]3 ns and [similar to]10 [mu]s, and a 440-nm band with a lifetime of [similar to]1 ms at room temperature. In a test for laser action no optical gain was observed in a deformed CaO crystal.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6669973
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:9; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
DEFORMATION
EFFICIENCY
EMISSION SPECTRA
HEAT TREATMENTS
LUMINESCENCE
OXIDES
OXYGEN COMPOUNDS
QUANTUM EFFICIENCY
SPECTRA
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K