Now showing items 1-6 of 6

    • Experimental observation of cavity formation in composite metamaterials 

      Caglayan H.; Bulu I.; Loncar, M.; Özbay, Ekmel (Optical Society of American (OSA), 2008)
      In this paper, we investigated one of the promising applications of left-handed metamaterials: composite metamaterial based cavities. Four different cavity structures operating in the microwave regime were constructed, and ...
    • Highly directive radiation and negative refraction using photonic crystals 

      Özbay, Ekmel; Bulu, I.; Aydin, K.; Caglayan H.; Alici, K. B.; Guven, K. (Institute of Physics Publishing, 2005)
      In this article, we present an experimental and numerical study of certain optical properties of two-dimensional dielectric photonic crystals (PCs). By modifying the band structure of a two-dimensional photonic crystal ...
    • 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 ...
    • Rapid and sensitive colorimetric ELISA using silver nanoparticles, microwaves and split ring resonator structures 

      Addae, S.A.; Pinard, M.A.; Caglayan H.; Cakmakyapan, S.; Caliskan, D.; Özbay, Ekmel; Aslan, K. (2010)
      We report a new approach to colorimetric Enzyme-Linked Immunosorbent Assay (ELISA) that reduces the total assay time to < 2 min and the lower-detection-limit by 100-fold based on absorbance readout. The new approach ...
    • Spoof-plasmon relevant one-way collimation and multiplexing at beaming from a slit in metallic grating 

      Çakmakyapan, Semih; Serebryannikov, A.E.; Caglayan H.; Özbay, Ekmel (Optical Society of America, 2012)
      Diode and collimator/multiplexer functions are suggested to be combined in one device that is based on a thin metallic grating with a single subwavelength slit. A proper choice of the structural (a)symmetry of the grating ...
    • Surface wave splitter based on metallic gratings with sub-wavelength aperture 

      Caglayan H.; Özbay, Ekmel (Optical Society of American (OSA), 2008)
      We investigated the splitting of surface electromagnetic waves trapped at the output surface of a one-dimensional metallic grating structure. The output gratings of the structure asymmetrically such that the output surfaces ...