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Title: Upconversion and pump saturation mechanisms in Er{sup 3+}/Yb{sup 3+} co-doped Y{sub 2}Ti{sub 2}O{sub 7} nanocrystals

The Er{sup 3+}/Yb{sup 3+} co-doped Y{sub 2}Ti{sub 2}O{sub 7} nanocrystals were synthesized by the sol–gel method. X-ray diffraction, transmission electronic microscopy, and photoluminescence spectra were measured to verify the Y{sub 2}Ti{sub 2}O{sub 7} nanocrystalline produced in the sample annealed at 800 °C. The anomalous slopes of the fitted line in the log-log plots for upconversion emissions and the pump-saturation effect of near-infrared emission were observed in the nanocrystalline samples. A theoretical model of practical Er{sup 3+}/Yb{sup 3+} co-doped system based on the rate equations were put forward and explained the experimental phenomena well.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3] ;  [2]
  1. School of Physics, Nankai University, Tianjin 300071 (China)
  2. (China)
  3. The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai University, Tianjin 300457 (China)
Publication Date:
OSTI Identifier:
22273691
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANNEALING; CRYSTALS; DOPED MATERIALS; EMISSION SPECTRA; ERBIUM IONS; NANOSTRUCTURES; PHOTOLUMINESCENCE; TITANATES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; YTTERBIUM IONS; YTTRIUM COMPOUNDS