1. 1 R. T. Wegh , E. V. D. van Loef , and A. Meijerink , “Visible Quantum Cutting Via Downconversion in LiGdF4: Er3+, Tb3+ upon Er3+4f(11)->4f(10)5d Excitation,” J. Lumin., 90 [34] 111-22 (2000).
2. 2 R. T. Wegh , H. Donker , K. D. Oskam , and A. Meijerink , “Visible Quantum Cutting in LiGdF4: Eu3+ Through Downconversion,” Science, 283 [5402] 663-6 (1999).
3. 3 P. Vergeer , T. J. H. Vlugt , M. H. F. Kox , M. I. den Hertog , J. P. J. M. van der Eerden , and A. Meijerink , “Quantum Cutting by Cooperative Energy Transfer in YbxY1−xPO4: Tb3+,” Phys. Rev. B, 71, 014119, 11pp (2005).
4. 4 X. Liu , S. Ye , Y. Qiao , G. Dong , B. Zhu , D. Chen , G. Lakshminarayana , and J. Qiu , “Cooperative Downconversion and Near-Infrared Luminescence of Tb3+-Yb3+ Codoped Lanthanum Borogermanate Glasses,” Appl. Phys. B-Lasers Opt., 96 [1] 51-5 (2009).
5. 5 D. Q. Chen , Y. L. Yu , Y. S. Wang , P. Huang , and F. Y. Weng , “Cooperative Energy Transfer Up-Conversion and Quantum Cutting Down-Conversion in Yb3:TbF3 Nanocrystals Embedded Glass Ceramics,” J. Phy. Chem. C, 113 [16] 6406-10 (2009).