Melt quenching was used to make sodium borate and sodium-lead-germano-tellurite (SLGT) oxyfluoride glasses embedded with Er3+ and/or Ag. The glasses were characterised using thermal analysis, X-ray diffraction, and optical spectroscopy measurements. Heat treatment of the glasses resulted in the formation of nanoparticles. Because of the increased field in the vicinity of silver particles, Er3+ luminescence increased by 4 times. Under 972 nm Ti-sapphire laser excitation, high room temperature upconversion emissions were observed from Er3+ doped SLGT sample at 415, 540, 554, and 667 nm. The formation of nanocrystals was aided by changes in optical spectral characteristics.
Author (s) Details
B. Rami Reddy
Department of Physics, Alabama A&M University, Normal, AL 35762, USA.
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