Abstract

The intensities of electronic Raman-scattering transitions between the ground state and the first excited state of the 2F7/2 manifold of Ce3+ in both the C2 and C3i sites of Y2O3 are measured as a function of excitation frequency in the region of the lowest 4f → 5d intermediate-state resonance with a wavelength-tunable pulsed dye laser. As the dye laser is tuned through the center of the resonance, we observe a 2-order-of-magnitude enhancement in electronic Raman-transition intensity over that for nonresonant excitation. The electronic Raman excitation profiles (resonance enhancement as a function of frequency) in the 15 949-to 23 810-cm−1 (627–420-nm) range provide spectrally resolved information about the lowest 4f → 5d transitions of both the C2 and C3i centers that could not be obtained from the strongly overlapping absorption spectra.

© 1994 Optical Society of America

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