Author(s)

Neilo Marcos Trindade, Américo Tabata, Rosa Maria Fernandes Scalvi, Luis Vicente de Andrade Scalvi

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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 Cr3³⁺ transition depending on the measurement temperature. A simple model to explain the phenomena is suggested.

Alexandrite, Luminescence , Cr³⁺ Transitions, Optical Absorption

N. Trindade, A. Tabata, R. Scalvi and L. Scalvi, "Temperature Dependent Luminescence Spectra of Synthetic and Natural Alexandrite (BeAl₂O₄:Cr³⁺)," Materials Sciences and Applications, Vol. 2 No. 4, 2011, pp. 284-287. doi: 10.4236/msa.2011.24037.