Polarization of emission spectra from Ti3+-doped oxide crystals - II. Zero-phonon emission lines

M. Yamaga, B. Henderson, K. P. O'Donnell, F. Rasheed, Y. Gao, B. Cockayne

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The Ti3+ ion in YAlO3 (YAP), Y3Al5O12 (YAG), and Al2O3 crystals occupies distorted octahedral sites relative to the nearest neighbour ligand ions. Such distortions are of even-parity in YAG where the zero-phonon lines in emission occur via magnetic dipole transitions. In contrast, the zero-phonon transitions occur by electric dipole processes in Ti3+:YAP and Ti3+:Al2O3 where there are odd-parity distortions from octahedral symmetry. This paper reports measurements of the zero-phonon lines of Ti3+ ions in YAP, YAG, and Al2O3 at 10 K. The zero-phonon lines of Ti3+:YAP are strongly polarized perpendicular to the tetragonal axis and those of Ti3+:Al2O3 parallel to the trigonal axis. The experimental results are shown to be in accord with a molecular orbital model of the radiative transition according to which the transition intensities derive from odd-parity ligand wavefunctions induced into even-parity ground and excited Ti3+ wavefunctions by odd-parity crystal distortions.

LanguageEnglish
Pages225-229
Number of pages5
JournalApplied Physics B Photophysics and Laser Chemistry
Volume52
Issue number3
DOIs
Publication statusPublished - 1 Mar 1991

Fingerprint

parity
emission spectra
oxides
yttrium-aluminum garnet
polarization
crystals
ions
ligands
magnetic dipoles
electric dipoles
molecular orbitals
symmetry

Keywords

  • crystal distortions
  • emission spectra

Cite this

Yamaga, M. ; Henderson, B. ; O'Donnell, K. P. ; Rasheed, F. ; Gao, Y. ; Cockayne, B. / Polarization of emission spectra from Ti3+-doped oxide crystals - II. Zero-phonon emission lines. In: Applied Physics B Photophysics and Laser Chemistry. 1991 ; Vol. 52, No. 3. pp. 225-229.
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abstract = "The Ti3+ ion in YAlO3 (YAP), Y3Al5O12 (YAG), and Al2O3 crystals occupies distorted octahedral sites relative to the nearest neighbour ligand ions. Such distortions are of even-parity in YAG where the zero-phonon lines in emission occur via magnetic dipole transitions. In contrast, the zero-phonon transitions occur by electric dipole processes in Ti3+:YAP and Ti3+:Al2O3 where there are odd-parity distortions from octahedral symmetry. This paper reports measurements of the zero-phonon lines of Ti3+ ions in YAP, YAG, and Al2O3 at 10 K. The zero-phonon lines of Ti3+:YAP are strongly polarized perpendicular to the tetragonal axis and those of Ti3+:Al2O3 parallel to the trigonal axis. The experimental results are shown to be in accord with a molecular orbital model of the radiative transition according to which the transition intensities derive from odd-parity ligand wavefunctions induced into even-parity ground and excited Ti3+ wavefunctions by odd-parity crystal distortions.",
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Polarization of emission spectra from Ti3+-doped oxide crystals - II. Zero-phonon emission lines. / Yamaga, M.; Henderson, B.; O'Donnell, K. P.; Rasheed, F.; Gao, Y.; Cockayne, B.

In: Applied Physics B Photophysics and Laser Chemistry, Vol. 52, No. 3, 01.03.1991, p. 225-229.

Research output: Contribution to journalArticle

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T1 - Polarization of emission spectra from Ti3+-doped oxide crystals - II. Zero-phonon emission lines

AU - Yamaga, M.

AU - Henderson, B.

AU - O'Donnell, K. P.

AU - Rasheed, F.

AU - Gao, Y.

AU - Cockayne, B.

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