In a crystallized sample of Er3+ doped Nb205 prepared by the sol-gel method, green upconversion fluorescence was observed around 544 nm under 805 nm excitation. Electron spin resonance (ESR) spectra for Er3+ in gels were also measured at 4.2K. The results were briefly discussed on the basis of dispersion of Er3+ ions in the Nb205 gel.
Origin
Ritsumeikan Universiyt, Japan
Journal Title
Phys Chem Glasses 38 5 1997 246-247
Sector
Special Glass
Class
S 1236