Temperature Dependent Luminescence Spectra of Synthetic and Natural Alexandrite
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2011
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Results of photoluminescence measurements for natural and synthetic alexandrite (BeAl2O4:Cr3+) are presented, where the samples are excited by the 488 nm line of an Ar+ laser, at different temperatures. The main issue is the analysis of the Cr3+ transition in the chrysoberyl matrix (BeAl2O4), with major technological application as active media for laser action. Results indicate anomalous behavior of Cr3+ transition depending on the measurement temperature. A simple model to explain the phenomena is suggested.
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Alexandrite, Luminescence, Cr3+ Transitions, Optical Absorption
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Materials Sciences and Applications, v. 02, p. 284-287, 2011.