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

doi:10.1063/1.3614001

Internal photopumping of Nd³⁺ (²H_9/2, ⁴F_5/2) 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

Electrical and Computer Engineering

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Abstract

Photoexcitation of Nd³⁺ (²H_9/2, ⁴F_5/2) 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 language	English (US)
Article number	031101
Journal	Applied Physics Letters
Volume	99
Issue number	3
DOIs	https://doi.org/10.1063/1.3614001
State	Published - Jul 18 2011

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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@article{7b3573dcf4a34a559a64a280d189f90f,

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

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 F{\"o}rster-Dexter excitation transfer in co-doped crystals.",

author = "Hewitt, {J. D.} and Spinka, {T. M.} and Senin, {A. A.} and Eden, {J. G.}",

note = "Funding Information: The support of this work by the II-VI Foundation and the U. S. Air Force Office of Scientific Research is gratefully acknowledged. ",

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T1 - Internal photopumping of Nd3+ (2H9/2, 4F5/2) states in yttrium aluminum garnet by excitation transfer from oxygen deficiency centers and Fe3+ continuum emission

AU - Hewitt, J. D.

AU - Spinka, T. M.

AU - Senin, A. A.

AU - Eden, J. G.

N1 - Funding Information: The support of this work by the II-VI Foundation and the U. S. Air Force Office of Scientific Research is gratefully acknowledged.

PY - 2011/7/18

Y1 - 2011/7/18

N2 - 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.

AB - 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.

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