Now showing items 1-9 of 9

  • All-dielectric self-cloaked structures 

    Hayran, Zeki; Kurt, H.; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (2018-03-17)
    Article
    Open Access
    A general procedure to design objects that are intrinsically invisible (without the necessity of an external cloak) has not been demonstrated so far. Here we propose a flexible method to design such self-cloaked objects ...
  • Asymmetric light transmission by using 2D PT-symmetric photonic nanostructure 

    Turduev, M.; Botey Cumella, Muriel; Herrero Simon, Ramon; Kurt, H.; Staliunas, Kestutis; Giden, I. (Wiley-IEEE Press, 2015)
    Conference report
    Restricted access - publisher's policy
    We propose for the first time a simple realization of a two-dimensional Parity-Time symmetric hexagonal shaped photonic structure composed of honeycomb lattice. The structure has a symmetric periodic modulation of the ...
  • Asymmetric transmission from a 2D PT-symmetric honeycomb nanostructure 

    Botey Cumella, Muriel; Herrero Simon, Ramon; Turduev, M.; Zhao, D.; Giden, I.; Kurt, H.; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference lecture
    Restricted access - publisher's policy
    We propose a simple realization of a 2-dimensonal (2D) PT-symmetric photonic structure: a honeycomb arrangement of alternating cylinders with gain or loss in a dielectric background. The structure provides a periodic ...
  • Chiral modes in 2D PT-symmetric nanostructures 

    Botey Cumella, Muriel; Herrero Simon, Ramon; Turduev, M.; Kurt, H.; Staliunas, Kestutis (Springer International Publishing, 2015-11-15)
    Part of book or chapter of book
    Restricted access - publisher's policy
    We propose the stabilization of the output beam of Broad Area Semiconductor (BAS) amplifiers through the introduction of a spatially periodic modulated potential. We show that a periodic modulation of the pump profile in ...
  • Directional invisibility by genetic optimization 

    Bor, Emre; Babayigit, Ceren; Kurt, H.; Staliunas, Kestutis; Turduev, M. (2018-11-26)
    Article
    Open Access
    In this Letter, the design of a directional optical cloaking by a genetic algorithm is proposed and realized experimentally. A three-dimensional finite-difference time-domain method is combined with the genetic optimization ...
  • Management of Light Patterns Based on Local Hilbert Transform 

    Staliunas, Kestutis; Ahmed, W.; Botey Cumella, Muriel; Herrero Simon, Ramon; Hayran, Zeki; Kurt, H. (2018)
    Conference report
    Restricted access - publisher's policy
    We propose a new approach of optical field management based on a local Hilbert transform, where the non-Hermitian potentials generating arbitrary vector fields of directionality p(\vec r), with desired shapes and topologies ...
  • Slow light enabled wavelength demultiplexing 

    Hayran, Zeki; Turduev, M.; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis; Kurt, H. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    Photonic crystal waveguides supporting band gap guided modes hold great potential to tailor the group velocity of propagating light. We propose and explore different wavelength demultiplexer design approaches that ...
  • Tunable wavelength-demultiplexer by tapered photonic crystal waveguide 

    Hayran, Zeki; Turduev, Mirbek; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis; Kurt, H. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Open Access
    We numerically investigate the design of a wavelength de-multiplexer based on a tapered photonic crystal waveguide. The tapered waveguide is generated by reducing the width of the channel which, in turn, provides a gradual ...
  • Two-dimensional complex parity-time-symmetric photonic structures 

    Turduev, M.; Botey Cumella, Muriel; Giden, I.; Herrero Simon, Ramon; Kurt, H.; Ozbay, E; Staliunas, Kestutis (2015-02-20)
    Article
    Open Access
    We propose a simple realistic two-dimensional complex parity-time-symmetric photonic structure that is described by a non-Hermitian potential but possesses real-valued eigenvalues. The concept is developed from basic ...