Now showing items 1-11 of 11

  • Controllable light diffraction in woodpile photonic crystals filled with liquid crystal 

    Ho, Chih-Hua; Cheng, Yu Chieh; Maigyte, Lina; Zeng, H; Trull Silvestre, José Francisco; Cojocaru, Crina; Wiersma, D.S.; Staliunas, Kestutis (2015-01-12)
    Article
    Open Access
    An approach to switching between different patterns of light beams transmitted through the woodpile photonic crystals filled with liquid crystals is proposed. The phase transition between the nematic and isotropic liquid ...
  • Enhanced transmission band in periodic media with loss modulation 

    Cebrecos, A.; Pico Vila, Rubén; Romero García, Vicenç; Yasser, A.M.; Maigyte, Lina; Herrero Simon, Ramon; Botey Cumella, Muriel; Sánchez Morcillo, Victor José; Staliunas, Kestutis (2014-11-17)
    Article
    Open Access
    We study the propagation of waves in a periodic array of absorbing layers. We report an anomalous increase of wave transmission through the structure related to a decrease of the absorption around the Bragg frequencies. ...
  • Flat lensing in the visible frequency range by woodpile photonic crystals 

    Maigyte, Lina; Purlys, Vytautas; Trull Silvestre, José Francisco; Peckus, Martynas; Cojocaru, Crina; Gailevicius, Darius; Malinauskas, Mangirdas; Staliunas, Kestutis (2013-07-15)
    Article
    Open Access
    We experimentally demonstrate full two-dimensional focalization of light beams at visible frequencies by a three-dimensional woodpile photonic crystal. The focalization (the flat lensing) with focal distances of the order ...
  • Formation of collimated beams behind the woodpile photonic crystal 

    Trull Silvestre, José Francisco; Maigyte, Lina; Malinauskas, Mangirdas; Mizeikis, Vygantas; Juodkazis, Saulius; Cojocaru, Crina; Rutkauskas, Marius; Peckus, Martynas; Sirutkaitis, Valdas; Staliunas, Kestutis (2011-09-09)
    Article
    Open Access
    We experimentally observe formation of narrow laser beams behind the woodpile photonic crystal, when the beam remains well collimated in free propagation behind the crystal. We show that the collimation depends on the input ...
  • Managing spatial diffraction through a periodic loss modulation 

    Botey Cumella, Muriel; Pradeep Kumar, Nikhil; Herrero Simon, Ramon; Maigyte, Lina; Staliunas, Kestutis (2014)
    Conference lecture
    Open Access
    We show that periodic distributions of gain or losses on the wavelength scale allow managing spatial diffraction of light beams, with no index contrast. It has been recently predicted that such artificial periodic structures, ...
  • Negative diffraction by a periodically modulated loss 

    Botey Cumella, Muriel; Pradeep Kumar, Nikhil; Herrero Simon, Ramon; Maigyte, Lina; Picó, Ruben; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference lecture
    Restricted access - publisher's policy
  • Shaping of light beams with photonic crystals : spatial filtering, beam collimation and focusing 

    Maigyte, Lina (Universitat Politècnica de Catalunya, 2014-07-01)
    Doctoral thesis
    Open Access
    The research developed in the framework of this PhD thesis is a theoretical, numerical and experimental study of light beam shaping (spatial filtering, beam collimation and focusing) in the visible frequency range using ...
  • Signatures of light-beam spatial filtering in a three-dimensional photonic crystal 

    Maigyte, Lina; Gertus, T.; Peckus, Martynas; Trull Silvestre, José Francisco; Sirutkaitis, Valdas; Cojocaru, Crina; Staliunas, Kestutis (2010-08-13)
    Article
    Open Access
    We report experimental evidence of spatial filtering of light beams by three-dimensional, low-refraction-index-contrast photonic crystals. The photonic crystals were fabricated in a glass bulk, where the refraction index ...
  • Spatial Filter based on Photonic Crystals 

    Maigyte, Lina (Universitat Politècnica de Catalunya, 2011-07-19)
    Master thesis
    Open Access
    Engish: Photonic crystals are considered as promising materials for controlling and manipulating the flow of light. In this work we give first experimental evidences of spatial filtering of light beams by three-dimensional ...
  • Spatial filtering by axisymmetric photonic crystals 

    Staliunas, Kestutis; Gailevicius, Darius; Purlys, Vytautas; Maigyte, Lina; Peckus, Martynas (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    Photonic crystals due to their angular bandgaps and quasi-bandgaps can provide spatial (angular) filtering of light. Two-dimensional photonic crystals (photonic structures modulated along the longitudinal and along one ...
  • Super-collimation by axisymmetric photonic crystals 

    Purlys, Vytautas; Maigyte, Lina; Gailevicius, Darius; Peckus, Martynas; Gadonas, Roaldas; Staliunas, Kestutis (2014-06-02)
    Article
    Open Access
    We propose and experimentally show the mechanism of beam super-collimation by axisymmetric photonic crystals, specifically by periodic (in propagation direction) structure of layers of concentric rings. The physical mechanism ...