Internal photopumping of Nd3+ (2H9/2, 4F5/2) states in yttrium aluminum garnet by excitation transfer from oxygen deficiency centers and Fe3+ continuum emission

J. D. Hewitt, T. M. Spinka, A. A. Senin, J. G. Eden

Research output: Contribution to journalArticlepeer-review

Abstract

Photoexcitation of Nd3+ (2H9/2, 4F5/2) states by the broad (∼70 nm FWHM), near-infrared continuum provided by Fe3+ has been observed at 300 K in bulk yttrium aluminum garnet (YAG) crystals doped with trace concentrations (<50 ppm) of Fe, Cr, and Eu. Irradiation of YAG at 248 nm with a KrF laser, which excites the oxygen deficiency center (ODC) in YAG having peak absorption at ∼240 nm, culminates in ODC→Fe3+ excitation transfer and subsequent Fe3+ emission. This internal optical pumping mechanism for rare earth ions is unencumbered by the requirement for donor-acceptor proximity that constrains conventional Förster-Dexter excitation transfer in co-doped crystals.

Original languageEnglish (US)
Article number031101
JournalApplied Physics Letters
Volume99
Issue number3
DOIs
StatePublished - Jul 18 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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