Figure 2 | Characterization of optical switching of UCL emission in core–shell UCNPs under dual-beam irradiation. (IMAGE)
Caption
Figure 2 | Characterization of optical switching of UCL emission in core–shell UCNPs under dual-beam irradiation. (A) Confocal images showing 450‑nm UCL from Yb,Tm@Y, Yb@Tm@Y, and Tm@Yb@Y UCNPs under 980 nm laser alone (left) and dual‑beam irradiation with 980 nm and 808 nm lasers (right). (B) Comparison of measured and theoretical UCL intensities for the three types of UCNPs under dual‑beam irradiation. Excitation at 980 nm: 0.1–1 mW; depletion at 808 nm: varied.
Credit
Min Gu et al.
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