Upconverted hot luminescence of Cr4+ ions in Mg2GeO4

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

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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 languageEnglish (US)
Pages (from-to)2396-2400
Number of pages5
JournalJournal of the Optical Society of America B: Optical Physics
Issue number11
StatePublished - Nov 1996
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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