Upconverted hot luminescence of Cr4+ ions in Mg2GeO4

S. G. Demos; B. Y. Han; V. Petričević; R. R. Alfano

Upconverted hot luminescence of Cr⁴⁺ ions in Mg₂GeO₄

S. G. Demos, B. Y. Han, V. Petričević, R. R. Alfano

Research output: Contribution to journal › Article › peer-review

Abstract

Nonequilibrium excited vibronic states of Cr⁴⁺ ions in Mg₂GeO₄ were studied with the upconverted hotluminescence technique. From the discrete spectral peaks observed, information on the nonradiative relaxation of the Cr⁴⁺ ions was obtained. The phonon modes involved in the nonradiative relaxation were measured to be ω₁ = 451 ± 20 cm^-1, ω₂ = 342 ± 20 cm^-1, and ω₃ = 252 ± 20 cm^-1. The experiment also shows the presence of an electronic bottleneck centered at ∼2.1 eV. These findings are compared with results previously obtained in Cr⁴⁺-doped Mg₂SiO₄ and provide information on the nonradiative relaxation of the same ion in different host crystals.

Original language	English (US)
Pages (from-to)	2396-2400
Number of pages	5
Journal	Journal of the Optical Society of America B: Optical Physics
Volume	13
Issue number	11
State	Published - Nov 1996
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Upconverted hot luminescence of Cr4+ ions in Mg2GeO4 ",

abstract = "Nonequilibrium excited vibronic states of Cr4+ ions in Mg2GeO4 were studied with the upconverted hotluminescence technique. From the discrete spectral peaks observed, information on the nonradiative relaxation of the Cr4+ ions was obtained. The phonon modes involved in the nonradiative relaxation were measured to be ω1 = 451 ± 20 cm-1, ω2 = 342 ± 20 cm-1, and ω3 = 252 ± 20 cm-1. The experiment also shows the presence of an electronic bottleneck centered at ∼2.1 eV. These findings are compared with results previously obtained in Cr4+-doped Mg2SiO4 and provide information on the nonradiative relaxation of the same ion in different host crystals.",

author = "Demos, {S. G.} and Han, {B. Y.} and V. Petri{\v c}evi{\'c} and Alfano, {R. R.}",

year = "1996",

month = nov,

language = "English (US)",

volume = "13",

pages = "2396--2400",

journal = "Journal of the Optical Society of America B: Optical Physics",

issn = "0740-3224",

publisher = "The Optical Society",

number = "11",

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T1 - Upconverted hot luminescence of Cr4+ ions in Mg2GeO4

AU - Demos, S. G.

AU - Han, B. Y.

AU - Petričević, V.

AU - Alfano, R. R.

PY - 1996/11

Y1 - 1996/11

N2 - Nonequilibrium excited vibronic states of Cr4+ ions in Mg2GeO4 were studied with the upconverted hotluminescence technique. From the discrete spectral peaks observed, information on the nonradiative relaxation of the Cr4+ ions was obtained. The phonon modes involved in the nonradiative relaxation were measured to be ω1 = 451 ± 20 cm-1, ω2 = 342 ± 20 cm-1, and ω3 = 252 ± 20 cm-1. The experiment also shows the presence of an electronic bottleneck centered at ∼2.1 eV. These findings are compared with results previously obtained in Cr4+-doped Mg2SiO4 and provide information on the nonradiative relaxation of the same ion in different host crystals.

AB - Nonequilibrium excited vibronic states of Cr4+ ions in Mg2GeO4 were studied with the upconverted hotluminescence technique. From the discrete spectral peaks observed, information on the nonradiative relaxation of the Cr4+ ions was obtained. The phonon modes involved in the nonradiative relaxation were measured to be ω1 = 451 ± 20 cm-1, ω2 = 342 ± 20 cm-1, and ω3 = 252 ± 20 cm-1. The experiment also shows the presence of an electronic bottleneck centered at ∼2.1 eV. These findings are compared with results previously obtained in Cr4+-doped Mg2SiO4 and provide information on the nonradiative relaxation of the same ion in different host crystals.

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