title: Light transmission through a circular metallic grating under broadband radial and azimuthal polarization illumination.
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.
authors: 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
authors: Gilad M
authors: GM
authors: Lerman
authors: Meir
authors: M
authors: Grajower
authors: Avner
authors: A
authors: Yanai
authors: Uriel
authors: U
authors: Levy