Analysis of vibronic transitions in titanium doped sapphire using the temperature of the fluorescence spectra

1 October 1985

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Quantum Electronics

Vol. 21 (10) , 1619-1624
https://doi.org/10.1109/jqe.1985.1072564

Abstract

An analysis of the fluorescence spectra of titanium doped sapphire crystals for temperatures ranging from 13 to 578 K is made. Zero- and multiphonon assisted electronic transitions are observed at temperatures below 125 K. Zero-phonon transition energies agree with previously reported measured and predicted values. Phonon assisted transitions suggest that two principle modes of lattice vibrations with energies of 220 and 260 cm^-1are coupled to the electronic²T_{2g}state. A single phonon energy of 173 cm^-1is observed to couple to the²Egelectronic state. Crossover energy is estimated to be about 11 800 cm^-1using a simple harmonic approximation. Lineshape analysis is performed. The fluorescence lifetime was measured to be a constant 3.9 μS below 150 K decreasing to 2.9 μs at 300 K.

Keywords

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