Raman and Fluorescence Spectroscopy of CeO₂, Er₂O₃, Nd₂O₃, Tm₂O₃, Yb₂O₃, La₂O₃, and Tb₄O₇

Figure 4

Emission spectra from Er₂O₃ using (a) 633 nm excitation, (b) 514 nm excitation, and (c) 442 nm excitation.