Now showing items 1-4 of 4

    • Absorption enhancement in InGaN-based photonic crystal-implemented solar cells 

      Gundogdu, T. F.; Gokkavas, M.; Özbay, Ekmel (SPIE, 2012-07-26)
      We investigate the absorption characteristics of InGaN solar cells with high indium (0.8) content and a one-dimensional periodic nano-scale pattern (implemented) in the InGaN layer theoretically. The short-circuit current ...
    • Bilayer metamaterial: analysis of left-handed transmission and retrieval of effective medium parameters 

      Guven, K.; Cakmak, A. O.; Caliskan, M. D.; Gundogdu, T. F.; Kafesaki, M.; Soukoulis, C. M.; Özbay, Ekmel (Institute of Physics Publishing Ltd., 2007)
      We report an experimental and numerical analysis of a planar metamaterial designed for normal-to-plane propagation, and operating at microwave frequencies. The metamaterial consists of cutwire and wire patterns, which are ...
    • 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 ...
    • Simulation and micro-fabrication of optically switchable split ring resonators 

      Gundogdu, T. F.; Gökkavas, M.; Güven, K.; Kafesaki, M.; Soukoulis, C. M.; Özbay, Ekmel (Elsevier BV, 2007-10)
      The effect of conductivity variation as a proposed method for the investigation of photoconductive switching properties of split ring resonators (SRRs) is simulated. Three different systems that are applicable under certain ...