Polarization sensitive sub-wavelength metallic structures: toward near-field light confinement control |
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Authors: | A?Ndao Q?Vagne Email author" target="_blank">J?SalviEmail author F?I?Baida |
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Institution: | 1.Département d’Optique P.M. Duffieux, Institut FEMTO-ST UMR 6174 CNRS,Université de Franche–Comté,Besan?on Cedex,France |
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Abstract: | In this paper, we seek to demonstrate spatial near field light confinement with a truly sub-wavelength resolution in the visible
range. For that purpose, an opaque metallic screen is pierced with an array of rectangular nano-apertures which support polarization
sensitive guided modes. We show that it is possible to switch on and off sub-wavelength apertures about only 200 nanometers
away. Theoretical results have been performed (3D-FDTD home-made code) and are in good agreement with the experimental results.
These kinds of nano-structures might offer a convenient and versatile way to sub-wavelength light addressing, optical trapping,
molecular, or nano-probing, non-linear spectroscopy. |
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Keywords: | |
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