Optimization of surface plasmons launching from subwavelength hole arrays: modelling and experiments.
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TLDR
It is shown that the properties of the locally launched SP beams such as divergence or uniformity can be tuned by adjusting the shape of the micro-gratings, which allows for an optimized source array well adapted for providing a narrow, collimated and uniform beam.Abstract:
The launching of surface plasmons by micro-gratings of subwavelength apertures milled in a thick metal film is important for the development of surface plasmon based circuits. By comparing the near-field optical images of such surface plasmon sources with the results of a Huygens-Fresnel principle based scattering model, we show that the properties of the locally launched SP beams such as divergence or uniformity can be tuned by adjusting the shape of the micro-gratings. This allows us to propose an optimized source array well adapted for providing a narrow, collimated and uniform beam.read more
Citations
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Radiation guiding with surface plasmon polaritons
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Leakage radiation microscopy of surface plasmon polaritons
A. Drezet,Andreas Hohenau,Daniel Koller,Andrey L. Stepanov,Harald Ditlbacher,B. Steinberger,Franz R. Aussenegg,Alfred Leitner,Joachim R. Krenn +8 more
TL;DR: In this paper, the principle and methodology of leakage radiation microscopy (LRM) applied to surface plasmon polaritons (SPPs) is reviewed. And the authors show that LRM is a versatile optical far-field method allowing direct quantitative imaging and analysis of SPP propagation on thin metal films.
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A microscopic view of the electromagnetic properties of sub-wavelength metallic surfaces
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