Downconversion from visible to near infrared through multi-wavelength excitation in Er3+/Yb3+ co-doped NaYF4 nanocrystals

Sai Xu, Wen Xu, Biao Dong, Xue Bai, Hongwei Song
  • Journal of Applied Physics, January 2011, American Institute of Physics
  • DOI: 10.1063/1.3666068