Spectroscopic Investigation on BaSO4:(Mn6+, Mn5+) Crystal

Abstract

BaSO4:(Mn6+, Mn5+) crystal was grown using MnCO3 as manganese source at high temperature from 650 to 750°C by the NaCl-KCl flux method in air and its spectroscopic properties were investigated. The experimental results indicate that Mn6+ and Mn5+ ions coexisted in the crystal. A broadband emission band peaking at ∼1060 nm due to the 2T2 → 2E transition of Mn6+ ion and a sharp emission band peaking at ∼1183 nm due to the 1E → 3A2 transition of Mn5+ ion were observed. Mn-doped BaSO4 single crystal may be a promising candidate as tunable near-infrared solid-state laser material.