Now showing items 1-9 of 9

  • Angular filtering by Bragg photonic microstructures fabricated by physical vapour deposition 

    Grineviciute, Lina; Babayigit, Ceren; Gailevicius, Darius; Bor, Emre; Turduev, Mirbek; Purlys, Vytautas; Tolenis, Tomas; Kurt, Hamza; Staliunas, Kestutis (2019-07-01)
    Article
    Restricted access - publisher's policy
    We propose and experimentally demonstrate spatial filtering by photonic crystals in a Bragg configuration. Compared to the Laue configuration, where spatial filtering was already demonstrated before, the Bragg configuration ...
  • Asymmetric light transmission effect based on an evolutionary optimized semi-Dirac cone dispersion photonic structure 

    Bor, Emre; Turduev, Mirbek; Yasa, Utku Görkem; Kurt, Hamza; Staliunas, Kestutis (American Physical Society (APS), 2018-12-10)
    Article
    Open Access
    In this paper, we present the numerical and experimental demonstration of asymmetric light transmission by a compact photonic crystal (PC) structure, which sustains semi-Dirac cone dispersion. The semi-Dirac point is ...
  • Asymmetric light transmission in PT-Symmetric microring resonators 

    Giden, I.; Dadashi, Kh.; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis; Kurt, Hamza (2016-03-15)
    Article
    Restricted access - publisher's policy
    We propose a new type of add-drop microring resonator made of gain and loss materials. Microring resonators are compact, narrow band, and optical channel dropping filters. In such linear systems, light transmission to ...
  • Directionality fields generated by a local Hilbert transform 

    Ahmed, W. W.; Herrero Simon, Ramon; Botey Cumella, Muriel; Hayran, Zeki; Kurt, Hamza; Staliunas, Kestutis (American Physical Society, 2018-03-15)
    Article
    Open Access
    We propose an approach based on a local Hilbert transform to design non-Hermitian potentials generating arbitrary vector fields of directionality, ¿p(¿r), with desired shapes and topologies. We derive a local Hilbert ...
  • Invisibility on demand based on a generalized Hilbert transform 

    Hayran, Zeki; Herrero Simon, Ramon; Botey Cumella, Muriel; Kurt, Hamza; Staliunas, Kestutis (American Physical Society (APS), 2018-07-12)
    Article
    Open Access
    We propose a feasible invisibility approach to suppress the scattering of waves from or to given directions and for particular frequencies, i.e., invisibility on demand. We derive a generalized Hilbert transform for a ...
  • Mid-infrared T-shaped photonic crystal waveguide for optical refractive index sensing 

    Turduev, Mirbek; Giden, I.; Giden, Ibrahim H.; Babayigit, Ceren; Bor, Emre; Boztug, Çiçek; Kurt, Hamza; Staliunas, Kestutis (2017-06-01)
    Article
    Open Access
    In this paper, we propose and design a new type of an integrated optical sensor that performs sensing in a wide wavelength range corresponding to mid-infrared (mid-IR) spectrum. By engineering the structural parameters of ...
  • Numerical and experimental demonstration of a wavelength demultiplexer design by point-defect cavity coupled to a tapered photonic crystal waveguide 

    Hayran, Zeki; Turduev, Mirbek; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis; Kurt, Hamza (2016-01-01)
    Article
    Open Access
    We propose and experimentally demonstrate a demultiplexer with point-defect resonators and a reflection feedback mechanism in a photonic crystal waveguide (PCW). A tapered PCW has been chosen as the necessary reflector, ...
  • Polarization-independent broadband bidirectional optical cloaking using a new type of inverse scattering approach 

    Hayran, Zeki; Herrero Simon, Ramon; Botey Cumella, Muriel; Kurt, Hamza; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    Since the advent of transformation optics a decade ago [1], the ability to achieve optical cloaking has become a matter of practical realization. However, so far extreme material requirements and large device areas have ...
  • Rainbow trapping in a chirped three-dimensional photonic crystal 

    Hayran, Zeki; Kurt, Hamza; Staliunas, Kestutis (Macmillan Publishers, 2017-06-08)
    Article
    Open Access
    Light localization and intensity enhancement in a woodpile layer-by-layer photonic crystal, whose interlayer distance along the light propagation direction is gradually varied, has been theoretically predicted and ...