Stimulated Luminescence of Europium Ions in Highly Scattering Lu2O3:Eu Nanomaterials

Strong pulsed nonresonant photoexcitation is used to study the spectral and kinetic characteristics of the stimulated luminescence of red intracenter electronic transitions of the Eu 3+ ion (580–650 nm) in densely packed nanopowders and nanospheres (diameter, 100–270 nm) of the composition Lu 2 O 3 :Eu (5–10 at %). The observed glow spot (~1 mm) is much larger than a laser spot focused on a powder sample (~100 μm). The recorded glow pulse slows upon an increase in the detected area, testifying to the inhomogeneity of luminescent radiation and its diffusion from the region of the photoexcitation spot.