Abstract:
: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:Yb(3+)/Er(3+) nanocrystals at the single particle level. In particular, we show that when the plasmonic resonance of silver nanolplatelets is tuned to 656 nm, matching the emission wavelength, an upconversion enhancement factor ~5 is obtained. However, when the plasmonic resonance is tuned to 980 nm, matching the nanocrystal absorption wavelength, we achieve an enhancement factor of ~22 folds. The precise geometric arrangement between fluorescent nanoparticles and silver nanoplatelets allows us to make, for the first time, a comparative analysis between experimental results and numerical simulations, yielding a quantitative agreement at the single particle level. Such a comparison lays the foundations for a rational design of hybrid metal-fluorescent nanocrystals to harness the upconversion enhancement for biosensing and light harvesting applications.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wang YL,Mohammadi Estakhri N,Johnson A,Li HY,Xu LX,Zhang Z,Alù A,Wang QQ,Shih CKdoi
10.1038/srep10196subject
Has Abstractpub_date
2015-05-15 00:00:00pages
10196issn
2045-2322pii
srep10196journal_volume
5pub_type
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