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One-and two-photon spectroscopy of monovalent copper ions in calcium fluoride

Pedrini, Christian
Moine, Bernard
Published in Journal of Physics. Condensed Matter. 1992, vol. 4, no. 10, p. 1615-1622
Abstract The spectroscopy of Cu+ ions embedded in an alkaline earth fluoride (CaF2) is reported for the first time. The absorption, emission and excitation spectra, as well as the lifetimes have been studied as a function of the temperature. It is shown that Cu+ ions occupy non-centro-symmetric sites. Furthermore, the analysis of the polarization dependence of two-photon absorption shows that, in fact, Cu+ ions appear to be located at sites of nearly cubic symmetry, in off-centre positions in the cube. The 1E and 1T2 singlet states are responsible for the main absorption in the near-UV range, and the emitting level is shown to be the 3T2 triplet state. This state is in fact split by the spin-orbit coupling into four components, but two close sub-levels could be responsible for the strong temperature dependence of the lifetime in the low-temperature range.
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Research group Groupe Bill
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PEDRINI, Christian, MOINE, Bernard, BILL, Hans. One-and two-photon spectroscopy of monovalent copper ions in calcium fluoride. In: Journal of Physics. Condensed Matter, 1992, vol. 4, n° 10, p. 1615-1622. https://archive-ouverte.unige.ch/unige:2924

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Deposited on : 2009-09-21

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