Tailoring Plasmonic Enhanced Upconversion in Single NaYF4:Yb 3+ /Er 3+ Nanocrystals
作者： Ya-Lan Wang , Nasim Mohammadi Estakhri , Amber Johnson , Hai-Yang Li , Li-Xiang Xu
DOI: 10.1038/SREP10196
关键词: Resonance 、 Plasmon 、 Nanocrystal 、 Photon upconversion 、 Particle 、 Wavelength 、 Optoelectronics 、 Absorption (electromagnetic radiation) 、 Surface plasmon resonance 、 Materials science
摘要: By using silver nanoplatelets with a widely tunable localized surface plasmon resonance (LSPR) and their corresponding local field enhancement, here we show large manipulation of plasmonic enhanced upconversion in NaYF4:Yb3+/Er3+ nanocrystals at the single particle level. In particular, that when nanolplatelets is tuned to 656 nm, matching emission wavelength, an enhancement factor ~5 obtained. However, 980 nm, nanocrystal absorption achieve ~22 folds. The precise geometric arrangement between fluorescent nanoparticles allows us make, for first time, comparative analysis experimental results numerical simulations, yielding quantitative agreement Such comparison lays foundations rational design hybrid metal-fluorescent harness biosensing light harvesting applications.
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