PL spectra of Er3+ ion and PLE spectra of both Er3+ ion and Si=O states. (a) PL spectra of the Er3+ ions in the SROEr films with various annealing conditions. (b) Normalized PLE spectra of the Si=O states (collected at 2.2 eV) and Er3+ (collected at 0.8 eV) for the SROEr film annealed at 1,150°C for 30 min.
Jin et al. Nanoscale Research Letters 2013 8:366 doi:10.1186/1556-276X-8-366