Browsing by Subject "Directional radiation"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    One-way transmission through the subwavelength slit in nonsymmetric metallic gratings
    (Optical Society of America, 2010-07-27) Cakmakyapan, S.; Serebryannikov, A. E.; Caglayan, H.; Özbay, Ekmel
    An approach for obtaining one-way transmission in the beaming regime is suggested that is based on the directional radiation of surface plasmons in nonsymmetric metallic gratings with a single slit. In contrast to the various nonsymmetric one-way diffraction gratings that have recently been proposed, the possibility of obtaining of narrow beams is demonstrated. Strong directional selectivity can appear a wide range of the observation angles, while the angle of incidence is retained.
  • Thumbnail Image
    ItemOpen Access
    A plain photonic crystal for generating directional radiation from embedded sources
    (Institute of Physics Publishing Ltd., 2007) Guven, K.; Özbay, Ekmel
    We investigate experimentally the generation of highly directional radiation from a plain two-dimensional photonic crystal structure where an embedded source couples to a photonic crystal band having Bloch modes of even symmetry and negative group velocity. No modification is made to the crystal structure. By virtue of recent studies employing corrugated surface modes, this may be a viable method for generating directional radiation for antenna applications.