10 September 2014 Increased upconversion quantum yield in plasmonic structures
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Upconversion processes have found widespread applications in drug delivery, bio-imaging and solar-cells. In this paper we present a theoretical model that analyzes the impact of a plasmonic shield structure on the quantum yield of upconversion nanoparticles. We use this model to assess the efficiency of NaYF4: Tm3+ Yb3+/NaYF4 core-shell nanoparticles when embedded in a polymer matrix and covered by a metallic can-like structure. We find that as a result of this specific plasmonic structure, the upconversion luminescence from NIR to UV can be increased by a factor of 30.
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A. Elhalawany, A. Elhalawany, W. E. Hayenga, W. E. Hayenga, S. He, S. He, C. Lantigua, C. Lantigua, N. J. J. Johnson, N. J. J. Johnson, A. Almutairi, A. Almutairi, M. Khajavikhan, M. Khajavikhan, "Increased upconversion quantum yield in plasmonic structures", Proc. SPIE 9163, Plasmonics: Metallic Nanostructures and Their Optical Properties XII, 916331 (10 September 2014); doi: 10.1117/12.2061910; https://doi.org/10.1117/12.2061910

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