REFLECTANCE MEASUREMENTS ON EUROPIUM-DOPED LANGASITE, LANGANITE AND LANGATATE POWDERS

In order to compare the red luminescence efficiency of europium-doped langasite, langanite and langatate when pumped in various f-f absorption bands, reflectance measurements on powders are performed in the 350-650 nm wavelength domain. The langanite and langatate crystals show brighter luminescence than the langasite.

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