Remarkable Plasmonic Enhanced Luminescence of Ce3+doped Lanthanide Downconversion Nanoparticles in NIR‐II Window by Silver Hole‐Cap Nanoarrays (Advanced Optical Materials 30/2024)

Enhanced Luminescence of Lanthanide Downconversion Nanoparticles The study by Fang Xie and co‐workers (see article number 240660) demonstrates remarkable downconversion luminescence enhancement in the NIR‐II window by integrating Ce3+ ions into NaYF4:Yb3+,Er3+ nanoparticles and using silver hole‐cap nanoarrays (Ag‐HCNAs). This combined strategy achieves over two orders of magnitude enhancement through optimized doping and plasmonic effects. Insights from 3D FDTD simulations and time‐resolved measurements reveal significant electric field enhancements and increased radiative decay rates, offering promising advancements for biosensing and bioimaging applications in the NIR‐II region.