Title :
Luminescence quenching in a random medium
Author :
Redmond, S.M. ; Rand, S.C.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
We have investigated the origin of quenching of visible photoluminescence in Yb,Er:yttria nanopowders. We show that this phenomenon results from a thermal nonlinearity mediated by non-radiative processes at high temperatures, using the results of luminescence decay measurements together with a simple theoretical model.
Keywords :
erbium; nanoparticles; nonlinear optics; optical materials; photoluminescence; radiation quenching; random media; thermo-optical effects; visible spectra; ytterbium; yttrium compounds; Y/sub 2/O/sub 3/:Yb,Er; Yb,Er:yttria nanopowders; luminescence decay; luminescence quenching; nonradiative processes; random medium; thermal nonlinearity; visible photoluminescence; Conducting materials; Luminescence; Nanoparticles; Nonlinear optics; Optical filters; Optical materials; Optical sensors; Rapid thermal processing; Temperature dependence; Thermal conductivity;
Conference_Titel :
Quantum Electronics and Laser Science, 2003. QELS. Postconference Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-749-0
DOI :
10.1109/QELS.2003.237955
