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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Demos, S. G., Han, B. Y., Petričević, V., & Alfano, R. R. (1996). Upconverted hot luminescence of Cr4+ ions in Mg2GeO4
Journal of the Optical Society of America B: Optical Physics, 13(11), 2396-2400.