Figure 1

Experimental arrangement for controlling the UC fluorescence in lanthanide-doped nanocrystals by the femtosecond pulse shaping method
(a), where G1,2 are diffraction grating, C1,2 are column concave mirror, SLM is spatial light modulator and L1-3 are optical lens and the UV-VIS-NIR absorption spectrum (b) and the UC fluorescence spectrum in the visible light region (c) of 5%Er3+-doped NaYF4 nanocrystals.