Infrared quantum cutting in Tb{sup 3+},Yb{sup 3+} codoped transparent glass ceramics containing CaF{sub 2} nanocrystals
- State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027 (China)
Tb{sup 3+}-Yb{sup 3+} codoped transparent oxyfluoride glass ceramics containing CaF{sub 2} nanocrystals were synthesized. The formation of CaF{sub 2} nanocrystals in the glass ceramics was confirmed by x-ray diffraction and high resolution transmission electron microscopy. The incorporation of Tb{sup 3+} and Yb{sup 3+} into CaF{sub 2} nanocrystal lattice was confirmed by energy dispersive spectroscopy. Infrared quantum cutting involving Yb{sup 3+} 950-1100 nm ({sup 2}F{sub 5/2}{yields}{sup 2}F{sub 7/2}) emission was achieved upon the excitation of {sup 5}D{sub 4} energy level of Tb{sup 3+} at 484 nm. The photoluminescence properties have been studied for these glass ceramics. Yb{sup 3+} concentration dependent quantum efficiency was calculated, and the maximum efficiency approaches 155% before reaching concentration quenching threshold.
- OSTI ID:
- 21101971
- Journal Information:
- Applied Physics Letters, Vol. 92, Issue 14; Other Information: DOI: 10.1063/1.2907496; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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