Now showing items 1-20 of 32

    • Characterization of dielectric spheres by spiral imaging 

      Petrov, Dimitri; Rahuel, Nicolás; Molina Terriza, Gabriel; Torner Sabata, Lluís (2012)
      Article
      Open Access
      We study the spiral spectra scattered off transparent dielectric spheres when probed by different Laguerre–Gaussian light beams, carrying nested topological wavefront dislocations. We show that such scattering data may ...
    • Controllable patterns of parametric solitons 

      Minardi, S; Molina Terriza, Gabriel; Bramati, A; Ditrapani, P; Torner Sabata, Lluís; Pérez Torres, Juan; Petrov, D V; Soto-Crespo, J M (2001-12)
      Article
      Restricted access - publisher's policy
    • Deflection of quadratic solitons at edge dislocations 

      Petrov, D V; Carrasco Rodríguez, Sílvia; Molina Terriza, Gabriel; Torner Sabata, Lluís (2003-08)
      Article
      Restricted access - publisher's policy
      We report the observation of deflection of optical solitons generated in the frequency doubling of light beams containing edgelike topological amplitude and phase dislocations. The angular deflection of the solitons was ...
    • Demonstration of vortex-induced beam shaping in seeded SHG 

      Molina Terriza, Gabriel; Minardi, Stefano; Bramati, Alberto; Di Trapani, Paolo; Torner Sabata, Lluís (2001-07)
      Article
      Restricted access - publisher's policy
      We report the experimental demonstration of a method that allows the simultaneous frequency-doubling and the shaping of a light beam into a variety of patterns. The technique is based on the controllable generation of ...
    • Foto noticia 

      Molina Terriza, Gabriel; Toner, L; Torner Sabata, Lluís (2000-05)
      Article
      Open Access
    • Impact of imbalancing in the self-splitting of beams with nested vortices into solitons in quadratic nonlinear crystals 

      Molina Terriza, Gabriel; Pérez Torres, Juan; Torner Sabata, Lluís; Soto-Crespo, J M (1998-12)
      Article
      Restricted access - publisher's policy
      We address the existence and instability of bright vortex solitary waves in quadratic non-linear media under conditions for Type II second-harmonic generation and study in detail the effects introduced by the presence of ...
    • Management of the angular momentum of light: preparation of photons in multidimensional vector states of angular momentum 

      Molina Terriza, Gabriel; Pérez Torres, Juan; Torner Sabata, Lluís (2002-01)
      Article
      Restricted access - publisher's policy
      We put forward schemes to prepare photons in multidimensional vector states of orbital angular momentum. We show realizable light distributions that yield prescribed states with finite or infinite normal modes. In particular, ...
    • Multicharged vortex evolution in seeded second-harmonic generation 

      Molina Terriza, Gabriel; Torner Sabata, Lluís (2000-07)
      Article
      Restricted access - publisher's policy
      We show the dynamics of the evolution of screw phase dislocations in the wave fronts of Gaussian beams with nested multiple-charged vortices that propagate in quadratic nonlinear crystals under conditions for seeded ...
    • Multicolor soliton culsters 

      Kartashov, Yaroslav V.; Molina Terriza, Gabriel; Torner Sabata, Lluís (2002-11)
      Article
      Restricted access - publisher's policy
      We present a comprehensive theoretical investigation of the formation and propagation of multicolor ringlike soliton clusters in quadratic nonlinear materials under conditions for type I second-harmonic generation. We show ...
    • Multidimensional quantum states of the orbital angular momentum of light 

      Vaziri, A; Weihs, G.; Mair, A; Zeilinger, A; Molina Terriza, Gabriel; Pérez Torres, Juan; Torner Sabata, Lluís (2002-12)
      Article
      Restricted access - publisher's policy
    • Observation of optical vortex streets in walking-second harmonic generation 

      Molina Terriza, Gabriel; Dmitri, V Petrov; Recolons Martos, Jaume; Torner Sabata, Lluís (2002-04-15)
      Article
      Restricted access - publisher's policy
      We report what is believed to be the first experimental observation of spontaneous nucleation of arrays of optical vortices in the process of second-harmonic generation in a crystal with moderate Poynting vector walk-off, ...
    • Observation of optical vortex streets in walking-second harmonic generation 

      Molina Terriza, Gabriel; Petrov, Dimitri; Recolons Martos, Jaume; Torner Sabata, Lluís (OPTICAL SOC AMER - (OSA), 2002-04-30)
      Article
      Open Access
    • Observation of the dynamical inversion of the topological charge of an optical vortex 

      Molina Terriza, Gabriel; Recolons Martos, Jaume; Pérez Torres, Juan; Torner Sabata, Lluís; Wright, Ewan M. (AMERICAN PHYSICAL SOC, 2001-07-31)
      Article
      Open Access
    • Optical vortex streets 

      Molina Terriza, Gabriel; Petrov, D V; Torner Sabata, Lluís (2002-12)
      Article
      Restricted access - publisher's policy
    • Orbital angular momentum of photons in noncollinear parametric downconversion 

      Molina Terriza, Gabriel; Pérez Torres, Juan; Torner Sabata, Lluís (2003-11)
      Article
      Restricted access - publisher's policy
      Conservation of the orbital angular momentum (OAM) of light in photon downconversion has been observed experimentally in nearly collinear phase-matching geometries, where the pump, signal and idler photons propagate along ...
    • Preparation of engineered two-photon entangled states for multidimensional quantum information 

      Pérez Torres, Juan; Deyanova, Y; Torner Sabata, Lluís; Molina Terriza, Gabriel (2003-05)
      Article
      Restricted access - publisher's policy
      We put forward an experimentally feasible technique to generate engineered entangled states in d-dimensional Hilbert spaces in parametric down-conversion of photons. The scheme is based on the orbital angular momentum of ...
    • Probing canonical geometrical objects by digital spiral imaging 

      Molina Terriza, Gabriel; Rebane, L; Pérez Torres, Juan; Torner Sabata, Lluís; Carrasco, S (2007-05)
      Article
      Restricted access - publisher's policy
      We recently proposed a novel concept to remotely acquire information of objects, based on the discrete orbital angular momentum of light. Here we use two different schemes for implementing the technique. In order to test ...
    • Propagation and control of noncanonical optical vortices 

      Molina Terriza, Gabriel; Wright, E W; Torner Sabata, Lluís (2001-02)
      Article
      Restricted access - publisher's policy
      We predict new features for the evolution of noncanonical screw wave-front dislocations nested in diffracting light beams. The evolution equations for the location of single-charge dislocations are derived, and their ...
    • Properties of the spatial Wigner function of entangled photon pairs 

      González, Noelia; Molina Terriza, Gabriel; Pérez Torres, Juan (2009-10)
      Article
      Open Access
      In this paper we analyze some important characteristics of the spatial Wigner function of entangled photon pairs. We show that the Wigner description of quantum states that live in the infinite-dimensional spacemomentum degree ...
    • Reconfigurable dynamic beam shaping in seeded frequency-doubling 

      Molina Terriza, Gabriel; Torner Sabata, Lluís (2001-02)
      Article
      Restricted access - publisher's policy
      A new method that allows simultaneous frequency doubling and dynamic shaping of a Gaussian beam into a variety of light patterns is introduced. The novel technique is based on the controllable generation of multiple-vortex ...