Two-photon spectroscopy of MgO:Ni sup 2

We report polarized two-photon excitation spectra of the {sup 3}{ital A}{sub 2}{r arrow}{sup 3}{ital T}{sub 2}, {sup 1}{ital E}, and {sup 3}T{sub 1} transitions of Ni{sup 2+}-doped MgO measured by detecting the {sup 3}{ital T}{sub 2}{r arrow}{sup 3}{ital A}{sub 2} infrared luminescence with a Ge pho...

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Bibliographic Details
Published in:Physical review. B, Condensed matter Condensed matter, 1991-01, Vol.43:1
Main Authors: Campochiaro, C., McClure, D.S., Rabinowitz, P., Dougal, S.
Format: Article
Language:English
Subjects:
360204 - Ceramics, Cermets, & Refractories- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL FIELD
DOPED MATERIALS
ELECTROMAGNETIC RADIATION
EMISSION
ENERGY-LEVEL TRANSITIONS
INFRARED RADIATION
IONS
LIGANDS
LUMINESCENCE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MATERIALS SCIENCE
MULTI-PHOTON PROCESSES
NICKEL IONS
OXIDES
OXYGEN COMPOUNDS
POLARIZATION
RADIATIONS
STIMULATED EMISSION
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Summary:We report polarized two-photon excitation spectra of the {sup 3}{ital A}{sub 2}{r arrow}{sup 3}{ital T}{sub 2}, {sup 1}{ital E}, and {sup 3}T{sub 1} transitions of Ni{sup 2+}-doped MgO measured by detecting the {sup 3}{ital T}{sub 2}{r arrow}{sup 3}{ital A}{sub 2} infrared luminescence with a Ge photodiode. Two-photon excitation spectra of the {sup 3}{ital A}{sub 2}{r arrow}{sup 1}{ital T}{sub 2} and {ital b} {sup 3}{ital T}{sub 1} transitions were measured by monitoring the visible emission from the {sup 1}{ital T}{sub 2} state. Hidden zero-phonon lines have been revealed as well as even-parity vibrational features. Additionally, the assignments of the well-known one-photon, odd-parity vibronic spectra have been confirmed by comparison with the two-photon spectra. The two-photon polarization ratios were measured for the {sup 3}{ital T}{sub 2}({ital E}) and {sup 3}{ital T}{sub 2}({ital T}{sub 1}) zero-phonon lines and an intensity calculation using only the {ital d} electrons was performed. The failure of this calculation demonstrated that the ligands significantly contribute to the overall two-photon intensity.
ISSN:0163-1829
1095-3795
DOI:10.1103/PhysRevB.43.14