Vibronic structure in the photoluminescence spectrum of Cr3+ ions in garnets

K. P. O'Donnell; A. Marshall; M. Yamaga; B. Henderson; B. Cockayne

doi:10.1016/0022-2313(89)90081-1

Vibronic structure in the photoluminescence spectrum of Cr³⁺ ions in garnets

K. P. O'Donnell^*, A. Marshall, M. Yamaga, B. Henderson, B. Cockayne

^*Corresponding author for this work

Physics

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

62 Citations (Scopus)

Abstract

The low temperature photoluminescence from Cr³⁺ ions in Y₃Al₅O₁₂ (YAG), Y₃Ga₅O₁₂ (YGG), Gd₃Sc₂Ga₃O₁₂ (GSGG ) and Gd₃Sc₂Al₃O₁₂ (GSAG) have different characteristic lineshapes. YAG and YGG emit entirely in the R-lines with associated sidebands, whereas for GSGG and GSAG the emission is a mélange of R-line processes and broad ⁴T*_2g→⁴A_2g bands. This paper compares the experimental spectra of Cr³⁺ ions in these garnets in terms of the symmetry and energies of the vibrational models coupled to the electronic states. In GSGG, we have used fluorescence line narrowing (FLN) to probe the broadening of the vibronic structure introduced by compositional disorder.

Original language	English
Pages (from-to)	365-373
Number of pages	9
Journal	Journal of Luminescence
Volume	42
Issue number	6
DOIs	https://doi.org/10.1016/0022-2313(89)90081-1
Publication status	Published - 1 Jan 1989

Funding

This investigation was supported by grants from the SERC and Ministry of Defence, and by the award of a SERC Visiting Fellowship to one of us (MY). AM is indebted to SERC and Barr and Stroud Ltd for the award of a CASE studentship. The authors are particularly indebted to J.C. Plant and M.J. Crosbie of RSRE (Malvern) for growth of the GSGG and GSAG crystals.

Keywords

photoluminescence
garnet crystals
low temperature photoluminescence

Access to Document

10.1016/0022-2313(89)90081-1

Cite this

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title = "Vibronic structure in the photoluminescence spectrum of Cr3+ ions in garnets",

abstract = "The low temperature photoluminescence from Cr3+ ions in Y3Al5O12 (YAG), Y3Ga5O12 (YGG), Gd3Sc2Ga3O12 (GSGG ) and Gd3Sc2Al3O12 (GSAG) have different characteristic lineshapes. YAG and YGG emit entirely in the R-lines with associated sidebands, whereas for GSGG and GSAG the emission is a m{\'e}lange of R-line processes and broad 4T*2g→4A2g bands. This paper compares the experimental spectra of Cr3+ ions in these garnets in terms of the symmetry and energies of the vibrational models coupled to the electronic states. In GSGG, we have used fluorescence line narrowing (FLN) to probe the broadening of the vibronic structure introduced by compositional disorder.",

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AU - O'Donnell, K. P.

AU - Marshall, A.

AU - Yamaga, M.

AU - Henderson, B.

AU - Cockayne, B.

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AB - The low temperature photoluminescence from Cr3+ ions in Y3Al5O12 (YAG), Y3Ga5O12 (YGG), Gd3Sc2Ga3O12 (GSGG ) and Gd3Sc2Al3O12 (GSAG) have different characteristic lineshapes. YAG and YGG emit entirely in the R-lines with associated sidebands, whereas for GSGG and GSAG the emission is a mélange of R-line processes and broad 4T*2g→4A2g bands. This paper compares the experimental spectra of Cr3+ ions in these garnets in terms of the symmetry and energies of the vibrational models coupled to the electronic states. In GSGG, we have used fluorescence line narrowing (FLN) to probe the broadening of the vibronic structure introduced by compositional disorder.

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