Chinese Optics Letters, 2006, 4 (1): 0136, Published Online: Jun. 6, 2006
Enhancement of upconversion luminescence due to the formation of nanocrystals in Er3+-doped tellurite glasses Download: 666次
160.4670 optical materials 160.5690 rare earth doped materials 300.6280 spectroscopy fluorescence and luminescence 160.2750 glass and other amorphous materials
Abstract
Optically transparent Er3+-doped tellurite-based nanocrystallized glasses with the composition of 70TeO2-15Li2O-15Nb2O5-0.5Er2O3 (mol) have been prepared by a conventional melting quenching and the subsequent heat treatment processes. The sizes of grown nanocrystals in glass matrix appear to be 35-50 nm from the X-ray diffraction (XRD) measurement. The microhardness measurement shows that the Vickers hardness values of the nanocrystallized tellurite glasses are larger (33%-62%) than those in the base glass. The Raman spectra imply that the maximum phonon energy of the based glass decreases and shifts from 668 to 638 /cm after heat-treatment. Visible upconversion luminescence and infrared luminescence of the base glass and heat-treated glasses under 980-nm laser diode (LD) excitation are investigated. The 524-, 546- and 656-nm upconversion intensities by 980-nm pumping increase significantly.
Gang Zhou, Shixun Dai, Chunlei Yu, Junjie Zhang, Guonian Wang, Lei Wen, Zhonghong Jiang. Enhancement of upconversion luminescence due to the formation of nanocrystals in Er3+-doped tellurite glasses[J]. Chinese Optics Letters, 2006, 4(1): 0136.