Near-field analysis of surface waves launched at nanoslit apertures

With the aim of analyzing the properties of the waves that are scattered by nanoslits on metallic surfaces, we provide a direct observation of the near-field in a slit-doublet experiment at optical wavelengths. We show that two distinct waves are involved: a surface plasmon polariton and another wav...

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Bibliographic Details
Published in:Physical review letters 2007-04, Vol.98 (15), p.153902-153902, Article 153902
Main Authors: Aigouy, L, Lalanne, P, Hugonin, J P, Julié, G, Mathet, V, Mortier, M
Format: Article
Language:English
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Summary:With the aim of analyzing the properties of the waves that are scattered by nanoslits on metallic surfaces, we provide a direct observation of the near-field in a slit-doublet experiment at optical wavelengths. We show that two distinct waves are involved: a surface plasmon polariton and another wave with a free-space character. From the recorded data, we have extracted the amplitudes and phases of these waves, their damping characteristic lengths and their relative weights as a function of the separation distance from the slit. The analysis is fully supported by a quantitative agreement with vector-theory computational results.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.98.153902