Abstract
Two titanium-doped perovskites, EuAlO3 and GdAlO3, have been grown by laser-heated pedestal growth as potential visible–near-infrared lasers. The absorption spectra of EuAlO3:Ti and the lack of Ti3+ fluorescence from this material indicate the dominance of a charge-transfer transition between titanium and europium. The spectra of GdAlO3:Ti in the visible region are consistent with Ti3+ in an octahedral field. The absence of the charge-transfer transitions in the spectra of GdAlO3:Ti is due to the third ionization potential of Gd’s being approximately 4 eV smaller than that of Eu. GdA1O3:Ti has potential as a tunable-laser material with a center wavelength of 610 nm.
© 1989 Optical Society of America
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