Luminescence spectroscopy of high-energy 4f 11 levels of Er3+ in fluorides |
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| Authors: | R T WEGH E V D VAN LOEF G W BURDICK A MEIJERINK |
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| Institution: | 1. Debye Institute, Utrecht University , PO Box 80000, 3508 TA, Utrecht, The Netherlands;2. Department of Physics , Andrews University , Berrien Springs, MI, 49104, USA |
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| Abstract: | The 4f11 energy levels of Er3+ in LiYF4 in the spectral region 39000–65000 cm?1 have been studied. The agreement between experimental energy levels, obtained from luminescence excitation spectra, and calculated energy levels is good. Luminescence originating from high-lying energy levels has been investigated. Emission from the states 4D1/2 (～47 200cm?1), 2F(2)7/2 (～54700cm?1) and 2F(2)5/2 (～63 300cm?1) is observed. 2F(2)5/2 emission occurs for Er3+ in LaF3, where the 2F(2)5/2 level is situated just below the lowest 4f105d state, but also for Er3+ in LiYF4, where it lies in between the two lowest 4f105d states. |
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