Control of Green and Red Upconversion in NaYF4:Yb3+,Er3+ Nanoparticles by Excitation Modulation
Christian F Gainer1, Gihan S Joshua, Channa R De Silva
1Department of Biomedical Engineering, The University of Arizona, P.O. Box 210240, Tucson, Arizona 85721, United States of America.
Abstract:
Control of the two strongest upconversion emission lines in NaYF4:Yb3+, Er3+ nanoparticles is demonstrated by varying the excitation repetition rate. This technique may enable new multiplexed sensing modalities based on multicolor luminescent nanoparticles, currently contemplated for biomedical imaging and diagnostics.


