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Investigation of 2.9 μm luminescence properties and energy transfer in Tm3+/Dy3+co-doped chalcohalide glasses

Authors
Journal
Journal of Rare Earths
1002-0721
Publisher
Elsevier
Publication Date
Volume
29
Issue
2
Identifiers
DOI: 10.1016/s1002-0721(10)60412-7
Keywords
  • Chalcohalide Glasses
  • Luminescence Properties
  • Energy Transfer
  • Tm3+/Dy3+
  • Rare Earths
Disciplines
  • Physics

Abstract

Abstract A series of chalcohalide glasses based on the composition of 0.9(Ge 30Ga 5Se 65)-0.1CsI with different Tm 3+/Dy 3+-codoped ions concentrations were synthesized by melt-quenching technique. The absorption spectra and 2.9μm mid-infrared fluorescence spectra of glass samples under 800 nm laser excitation were measured. The results showed that Tm 3+ was an efficient sensitizer, which could enhance the Dy 3+:2.9 μm fluorescence intensity significantly. The effective energy transfer between the two rare-earth ions were mainly attributed to the resonance energy transfer from Tm 3+: 3F 4 to Dy 3+: 6H 11/2 level. Emission cross section of 2.9 μm mid-infrared luminescence was also investigated according to Judd-Ofelt theory, σ e =2.51×10 −20 cm 2.

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