Now showing items 1-9 of 9

    • Asymmetric transmission of terahertz waves using polar dielectrics 

      Serebryannikov, A. E.; Ozbay, E.; Nojima, S. (Optical Society of America, 2014-02-10)
      Asymmetric wave transmission is a Lorentz reciprocal phenomenon, which can appear in the structures with broken symmetry. It may enable high forward-to-backward transmittance contrast, while transmission for one of the two ...
    • Characterization of photonic crystals at microwave frequencies 

      Temelkuran, Burak (Bilkent University, 1996)
      VVe investigated the surface reflection properties of layer-by-layer photonic crystals, for dielectric and metallic based photonic crystals. By using a FabryPerot cavity analogy with the reflection-phase information of ...
    • Design of compact optical devices based on periodic meta-structures 

      Akosman, Ahmet Emin (Bilkent University, 2013)
      Manipulation of the flow of light is demanded for several applications such as communication, data storage, sensor, photovoltaic cells, microscopy, lasers and light emitting diodes for the purpose of designing compact, ...
    • Focusing of electromagnetic waves by a left-handed metamaterial flat lens 

      Aydin, K.; Bulu, I.; Ozbay, E. (Optical Society of America, 2005-10-31)
      We present here the experimental results from research conducted on negative refraction and focusing by a two-dimensional (2D) left-handed metamaterial (LHM) slab. By measuring the refracted electromagnetic (EM) waves from ...
    • Hyperbolic metamaterials based on quantum-dot plasmon resonator nanocomposites 

      Zhokovsky, S. V.; Ozel, T.; Mutlugun, E.; Gaponik, N.; Eychmuller, A.; Lavrinenko, A. V.; Demir, H. V.; Gaponenko, S. V. (Optical Society of America, 2014)
      We theoretically demonstrate that nanocomposites made of colloidal semiconductor quantum dot monolayers placed between metal nanoparticle monolayers can function as multilayer hyperbolic metamaterials. Depending on the ...
    • Optical properties of metamaterial-based devices modulated by a liquid crystal 

      Karaomerlioglu, F.; Mamedov, A. M.; Ozbay, E. (Springer Berlin Heidelberg, 2014)
      Due to the fact that it is possible to manipulate light with photonic crystals (PCs), PCs hold a great potential for designing new optical devices. There has been an increase in research on tuning the optical properties ...
    • Physics and Applications of Defect Structures in Photonic Crystals 

      Ozbay, E.; Guven, K.; Bayindir, M. (2003)
      Photonic crystals are three dimensional periodic structures having the property of reflecting the electromagnetic (EM) waves in all dimensions, for a certain range of frequencies. Defects or cavities around the same geometry ...
    • Sub-wavelength resolution in a photonic crystal superlens 

      Çubukçu, Ertuğrul (Bilkent University, 2003)
      Materials that can bend light in the opposite direction to normal (’left-handed’ materials) reverse the way in which refraction usually works-this negative refractive index is due to simultaneously negative permeability ...
    • Tight-binding mechanism in slow light regime 

      Akosman, A.E.; Mutlu, M.; Kurt H.; Ozbay, E. (2011)
      In this study, tight-binding formalism is applied to a photonic crystal coupled cavity structure in order to investigate the characteristics of ultra slow light modes. Eigen-mode splitting is observed and resulting group ...