Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403851 | Journal of Luminescence | 2007 | 4 Pages |
Abstract
Emission and excitation spectra as well as decay curves of Er3+ and Tm3+ ions doped into SrF2 crystals have been studied using time-resolved vacuum-ultraviolet spectroscopy under pulsed synchrotron radiation at 8Â K. In emission spectrum for crystals doped with Er3+ ions together with well-known emission caused by spin-forbidden 4f105dâ4f11 transitions (decay constant in the microsecond range), a new fast emission band detected at 146.5Â nm (decay constant is less than 0.6Â ns) has been revealed. It was shown that excitation spectra of f-f and d-f emission bands for Er3+ and Tm3+ ions in SrF2 have opposite behaviors in the spectral range corresponding to energy of their 4fn-15d configurations. These peculiarities and energy transfer mechanisms were analyzed.
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Authors
K.V. Ivanovskikh, V.A. Pustovarov, M. Kirm, B.V. Shulgin,