Abstract

The spectroscopic properties of Mn3+ and Mn2+ ions have been studied in Mn:YAlO3 codoped with Ce and singly Mn-doped YAlO3. Mn3+ absorption at the  5E5T2 transition, the transition between the Jahn–Teller split components of the ground state  5E, and Fano antiresonance mixing between the  3E and  5T2 states have been investigated. The weak absorption at 0.41 µm was attributed to the  6A14A1, 4E transition of Mn2+. Green emission peaking at 530 nm excited with x rays was attributed to the  4T16A1 transition of Mn2+. The reduction of Mn2+ concentration in photoexposed samples may imply the presence of Mn+ ions in YAlO3.

© 1999 Optical Society of America

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