Abstract
Single crystal of heavily Yb 3+ -doped Lu 3 Al 5 O 12 (Yb:LuAG) were grown by the micro-pulling-down method. Radio- and photoluminescence spectra of the Yb:LuAG were studied. Two bands peaking round 340–350 and 480–500 nm could be ascribed to charge transfer (CT) luminescence of Yb 3+ , as their position nearly coincide with the Yb 3+ -related CT emission in YAG matrix. The highest emission intensity was observed for Yb concentration of 5% with respect to the Lu site. Temperature dependence of photoluminescence spectra of the Yb: LuAG (5%) was measured and points to remarkable thermal quenching above liquid nitrogen temperature.
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