Influence of metallic nanoparticles on upconversion processes

Details Influence of metallic nanoparticles on upconversion processes Influence of metallic nanoparticles on upconversion processes

2008-10-07

arxiv.org/abs/0810.1218v2

Journal of applied Physics 105, 033107 2009

Physics

Optics

Changes mostly made on the structure of the text and on the notation to improve clarity. Other changes attempt to better clari

Scientific paper

10.1063/1.3075848

It is well known that Raman scattering and fluorescence can be enhanced by the presence of metallic nanoparticles. Here, we derive simple equations to analyse the influence of metallic nanoparticles on upconversion processes such as non-radiative energy transfer or excited state absorption. We compare the resulting expressions with the more familiar Raman and fluorescence cases, and find significant differences. We use numerical simulations to calculate the upconverted signal enhancement achievable by means of metallic spheres of different radii, and find particles of 100-400nm radius at infrared frequencies to be favorable. We also discuss the considerable challenges involved in using metallic particles to enhance upconversion for solar energy.

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