Now showing items 21-24 of 24

    • Physics and applications of photonic crystals 

      Özbay, Ekmel; Bulu I.; Aydin, K.; Caglayan H.; Guven, K. (Nanotechnology Research Center NANOTAM, 2004)
      In this article, we investigate how the photonic band gaps and the variety of band dispersions of photonic crystals can be utilized for various applications and how they further give rise to completely novel optical ...
    • A plain photonic crystal for generating directional radiation from embedded sources 

      Guven, K.; Özbay, Ekmel (Institute of Physics Publishing Ltd., 2007)
      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 ...
    • Planar bilayer metamaterial with left-handed transmission and negative refraction at microwave frequencies 

      Çakmak, A. Ö.; Guven, K.; Özbay, Ekmel (Wiley-VCH Verlag GmbH & Co. KGaA, 2007)
      A planar composite metamaterial consisting of bilayers of metal cutwire pairs and long wire pairs which are separated by a thin dielectric layer is designed and fabricated for microwave frequencies. The simulated and ...
    • A planar metamaterial with dual-band double-negative response at EHF 

      Gundogdu, T. F.; Guven, K.; Gokkavas, M.; Soukoulis, C. M.; Özbay, Ekmel (IEEE, 2009-10-02)
      We report the fabrication and electromagnetic characterization of a planar composite metamaterial (CMM) that is designed to achieve dual-frequency double-negative response at the lower end of the extremely high-frequency ...