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|Title:||Optical spectroscopy of Er3+ and Yb3+ co-doped fluoroindate glasses|
|Author(s):||Ribeiro, C. T.M.|
Zanatta, A. R.
Nunes, Luis A. O.
Aegerter, Michel A.
|Year of Publication:||1998|
|OPUS Source:||Journal of applied physics. - 83. 1998, 4, S. 2256-2260|
|SWD key words:||Optische Spektroskopie|
|DDC notations:||620 Engineering and machine engineering|
|Publikation type:||Journal Article|
|Abstract:||Optical absorption, Stokes, and anti-Stokes photoluminescence were performed on Er3+-Yb3+ co-doped fluoroindate glasses. For compounds prepared with a fixed 2 mol % ErF3 concentration and YbF3 contents ranging from 0 to 8 mol %, important upconversion processes were observed as a function of temperature and photon excitation energy. Based on the experimental data, two mechanisms for the upconversion (or anti-Stokes photoluminescence) processes were identified and analyzed in detail. At high Yb contents, the upconversion mechanisms are mostly determined by the population of the 2F5/2 levels of Yb3+ ions (or 4I11/2 levels of Er3+ ions, by energy transfer) regardless of the photon excitation energy and temperature of measurement. Moreover, green and red light emission have similar intensities when a large Yb3+ content is present.|
|Link to this record:||urn:nbn:de:bsz:291-scidok-24864|
|Date of registration:||3-Dec-2009|
|Faculty:||SE - Sonstige Einrichtungen|
|Department:||SE - INM Leibniz-Institut für Neue Materialien|
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