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Opt Lett. 2011 Oct 15;36(20):3972-4. doi: 10.1364/OL.36.003972.

Light transmission through a circular metallic grating under broadband radial and azimuthal polarization illumination.

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1
Department of Applied Physics, The Benin School of Engineering and Computer Science, The Hebrew University of Jerusalem, Jerusalem, Israel. gilad.lerman@mail.huji.ac.il

Abstract

We studied the characteristics of a circular metallic grating illuminated by broadband radial and azimuthal polarizations. We demonstrated that this scenario is the cylindrical analogue of a one-dimensional Cartesian grating illuminated by TM and TE polarizations. We measured the transmission spectra of this structure and observed strong polarization selectivity and, specifically, a resonance for radial polarization excitation, indicating a strong coupling to surface plasmons. The structure may be attractive for applications where pure radial polarization is needed, such as tight focusing, material processing, and particle trapping.

PMID:
22002356
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