Now showing items 1-9 of 9

    • All-chalcogenide glass omnidirectional photonic band gap variable infrared filters 

      Kondakci, H. E.; Yaman, M.; Koylu, O.; Dana, A.; Bayindir, M. (AIP Publishing, 2009)
      We report on the design, fabrication, and characterization of spatially variable infrared photonic band gap filter that consists of thermally evaporated, high refractive indexcontrast, amorphous chalcogenide glass multilayers. ...
    • All-chalcogenide variable infrared filter 

      Kondakci H.E.; Koylu O.; Yaman, M.; Dana, A.; Bayindir, M. (2009)
      We present the design, fabrication, characterization of spatially variable infrared filter and a demonstration of the filter as a simple infrared spectrometer. A varying photonic band gap filter which consists of thermally ...
    • Band gap and optical transmission in the Fibonacci type one-dimensional A5B6C7 based photonic crystals 

      Simsek S.; Koc, H.; Palaz S.; Oltulu, O.; Mamedov, A. M.; Ozbay, E. (Wiley-VCH Verlag, 2015)
      In this work, we present an investigation of the optical properties and band structure calculations for the photonic crystal structures (PCs) based on one-dimensional (1D) photonic crystal. Here we use 1D A5B6C7(A:Sb; ...
    • Laser-micromachined millimeter-wave photonic band-gap cavity structures 

      Özbay, E.; Tuttle, G.; McCalmont, J. S.; Sigalas, M.; Biswas, R.; Soukoulis, C. M.; Ho, K. M. (American Institute of Physics, 1995)
      We have used laser-micromachined alumina substrates to build a three-dimensional photonic band-gap crystal. The rod-based structure has a three-dimensional full photonic band gap between 90 and 100 GHz. The high resistivity ...
    • Observation of negative refraction and focusing in two-dimensional photonic crystals 

      Ozbay, E.; Bulu, M.; Guven, K.; Caglayan, H.; Aydin, K. (Institute of Physics Publishing Ltd., 2006)
      We experimentally and theoretically demonstrate the negative refraction and focusing of electromagnetic (EM) waves by twodimensional photonic crystal slabs at microwave frequencies. The negative refraction is observed both ...
    • Photonic band gap in the triangular lattice of Bose-Einstein-condensate vortices 

      Taşgin, M. E.; Müstecaplioǧlu Ö. E.; Oktel, M. Ö. (2007)
      We investigate the photonic bands of an atomic Bose-Einstein condensate with a triangular vortex lattice. Index contrast between the vortex cores and the bulk of the condensate is achieved through the enhancement of the ...
    • Photonic band gap via quantum coherence in vortex lattices of Bose-Einstein condensates 

      Müstecaplioǧlu, O. E.; Oktel, M. Ö. (The American Physical Society, 2005)
      We investigate the optical response of an atomic Bose-Einstein condensate with a vortex lattice. We find that it is possible for the vortex lattice to act as a photonic crystal and create photonic band gaps, by enhancing ...
    • Two-dimensional ferroelectric photonic crystals: Optics and band structure 

      Simsek S.; Mamedov, A. M.; Ozbay, E. (Taylor & Francis Inc., 2013-09-20)
      In this report we present an investigation of the optical properties and band structure calculations for the photonic structures based on the functional materials- ferroelectrics. A theoretical approach to the optical ...
    • Vortex lattice of a Bose-Einstein condensate as a photonic band gap material 

      Taşgin, M. E.; Müstecaplioǧlu, Ö. E.; Oktel, M. Ö. (IOP Institute of Physics Publishing, 2009)
      Photonic crystal behavior of a rotating Bose-Einstein condensate with a triangular vortex lattice is reviewed and a scheme for getting much wider band gaps is proposed. It is shown that photonic band gaps can be widened ...