Observation of electronic transitions in the far-infrared absorption spectrum of CaF2:Er3+
- 21 August 1974
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 7 (16) , L322-L324
- https://doi.org/10.1088/0022-3719/7/16/008
Abstract
Low-temperature, high-resolution measurements of the far-infrared absorption spectrum of CaF2:Er3+ have revealed two sharp lines at 21.10 and 32.76+or-0.05 cm-1. These lines correspond to transitions between the lowest 4I15/2 Stark levels of the Er3+ ion in a tetragonal crystal field. The temperature dependence of the lines is also presented and successfully analysed in terms of thermal population effects.Keywords
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