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Bishop, Stephen G. Turnbull, Douglas Alan 2012-04-26T19:35:10Z 2012-04-26T19:35:10Z 10000-01-01 1997 Photoluminescence characterization has discovered a novel broad band excitation effect in rare earth-doped chalcogenide glasses. Photoluminescence excitation (PLE) bands with a width of ~450 nm have been observed which efficiently excite a number of rare earth emission lines. This effect is attributed to the absorption of excitation light by the host glass with the subsequent transfer of energy to the rare earth dopants, mediated by defect states in the glass. Studies on the effect of changing the rare earth dopant, the host glass bandgap, the host glass composition, and the sample temperature have all been performed. From numerous similarities to the host glass PLE lineshape, fatiguing, temperature dependence, and the spectral range over which the effect occurs, the defect states in the glass responsible for the broad band PLE are idenitifed as being the same states which give rise to the host glass luminescence in chalcogenide glasses. The theoretical implications of this identification are explored. Submitted by Megan O'Donnell (mnodonn2@illinois.edu) on 2012-04-26T19:35:10Z No. of bitstreams: 1 1997_turnbull.pdf: 4168778 bytes, checksum: a1db8f9c9585988a3b112e9696d5f77d (MD5) Made available in DSpace on 2012-04-26T19:35:10Z (GMT). No. of bitstreams: 1 1997_turnbull.pdf: 4168778 bytes, checksum: a1db8f9c9585988a3b112e9696d5f77d (MD5) Previous issue date: 1997 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Megan O'Donnell (mnodonn2@illinois.edu) on 2012-04-26T19:35:10Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:33:25-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: dissertation/thesis dissertation/thesis U of I Only 4038107 http://hdl.handle.net/2142/30768 en © 1997 Douglas Alan Turnbull rare earth-doped chalcogenide glasses Photoluminescence excitation (PLE) rare earth dopants luminescence Broad excitation of rare earth dopants in chalcogenide glasses Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.