Photoluminescence and photoacoustic spectroscopies of Fe(3+) in the LiGa5O8-LiGaSiO4-Li5GaSi2O8 system.

This report is devoted to the study of the low and room temperature photoluminescence and photoacoustic spectroscopy of the Fe(3+) impurity ion in the LiGa(5)O(8)-LiGaSiO(4)-Li(5)GaSi(2)O(8) system. The sample was obtained by solid-state reaction between beta-Ga(2)O(3), Li(2)CO(3), SiO(2) and appropriated quantities of Fe(2)O(3). It was investigated by X-ray diffraction to determine the formed phases and through photoluminescence, excitation and photoacoustic spectroscopy measurements. The broad absorption and emission bands in the visible and near-infrared spectral regions presented by that system constitute the motivation for this study. More specifically, the luminescence occurs over a large interval of wavelengths, between 400 nm and 800 nm.