Transient photoluminescence enhancement as a probe of the structure of impurity-trapped excitons in CaF(2):Yb(2+)

TitleTransient photoluminescence enhancement as a probe of the structure of impurity-trapped excitons in CaF(2):Yb(2+)
Publication TypeJournal Article
Year of Publication2011
AuthorsM.F Reid, P.S Senanayake, J.PR Wells, G. Berden, A. Meijerink, A.J Salkeld, C.K Duan, R.J Reeves
JournalPhysical Review B
Volume84
Number11
Pagination4
Date PublishedSep
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000295163100001
KeywordsCAF2, CENTERS, IONIC-CRYSTALS, LANTHANIDES, LUMINESCENCE, PHOTOIONIZATION PROCESSES
Abstract

We demonstrate a direct measurement of the energy levels of impurity-trapped excitons in CaF(2):Yb(2+). The radically different radiative decay rates of the lowest exciton state and higher excited states enable the generation of a transient photoluminescence enhancement measured via a two-step excitation process. We observe sharp transitions arising from changes of state of localized electrons, broad bands associated with changes of state of delocalized electrons, and broad bands arising from trap liberation.

URL<Go to ISI>://WOS:000295163100001
Division

GUTHz

Department

FELIX

PID

e43e7ee0a8ae281b3790766864b137f7

Alternate TitlePhys. Rev. B

Go back one page.