Temperature Dependent Luminescence Spectra of Synthetic and Natural Alexandrite (BeAl<sub>2</sub>O<sub>4</sub>:Cr<sup>3+</sup>)

作     者：Neilo Marcos Trindade Américo Tabata Rosa Maria Fernandes Scalvi Luis Vicente de Andrade Scalvi 

作者机构：不详 

出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)

年 卷 期：2011年第2卷第4期

页      面：284-287页

学科分类：07[理学] 0703[理学-化学] 

主　　题：Alexandrite Luminescence Cr3+ Transitions Optical Absorption 

摘      要：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.