Fig. 3 | Nature Communications

Fig. 3

From: Low irradiance multiphoton imaging with alloyed lanthanide nanocrystals

Fig. 3

UCNP emission as a function of laser intensity. a Single 8-nm UCNP emission (496–745 nm) as a function of 980 nm laser excitation density. b Emission at low intensities from highlighted area (green dash) in a. c Emission (circles) and QYs (triangles) of single core/shell UCNPs (solid symbols) and aUCNPs (open symbols) relative to 20% Yb3+ 2% Er3+ core/shell UCNPs13. Values are based on averages of between 50 and 300 single UCNPs excited at a power density of 2 × 106 W cm−2. Relative QYs are calculated as in Methods

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