Temporal dynamics of the frequency non-degenerate transient photoluminescence enhancement observed following excitation of inter-configurational f→d transitions in CaF2:Yb2+

Rick van den Toorn, Jon Paul R. Wells, Michael F. Reid, Rosa B. Hughes-Currie, Giel Berden, Roger J. Reeves, A Meijerink

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

We present a detailed investigation of the dynamics of impurity-trapped excitons in CaF2:Yb2+using transient photoluminescence enhancement induced via a two-frequency, sequential excitation process employing a UV optical parametric amplifier (OPA) synchronized to an infrared free electron laser (FEL). The temporal behaviour is well approximated by a multi-level rate equation model as relaxation between excited states of the exciton as well as a small contribution from local lattice heating by the FEL which becomes evident due to the 40 cm−1splitting of the exciton excited states giving rise to the transient photoluminescence enhancement itself.
Original languageEnglish
Pages (from-to)608-615
Number of pages8
JournalJournal of Luminescence
Volume192
DOIs
Publication statusPublished - 1 Dec 2017

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