Impurity-trapped excitons and electron traps in CaF $_2$ :Yb $^{2+}$ and SrF $_2$ :Yb $^{2+}$ probed by transient photoluminescence enhancement

preprint2011arXivOpen access

CaF $_2$ :Yb $^{2+}$ and SrF $_2$ :Yb $^{2+}$ crystals have been investigated by a two-color UV + IR transient photoluminescence enhancement technique. The enhancement gives information about both changes in internal energy levels of the excitons and liberation of electrons from traps in the crystals.

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Impurity-trapped excitons and electron traps in CaF $_2$ :Yb $^{2+}$ and SrF $_2$ :Yb $^{2+}$ probed by transient photoluminescence enhancement

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Impurity-trapped excitons and electron traps in CaF2_22​:Yb2+^{2+}2+ and SrF2_22​:Yb2+^{2+}2+ probed by transient photoluminescence enhancement

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Impurity-trapped excitons and electron traps in CaF $_2$ :Yb $^{2+}$ and SrF $_2$ :Yb $^{2+}$ probed by transient photoluminescence enhancement