Exploració per autor "Molina Terriza, Gabriel"
Ara es mostren els items 11-30 de 32
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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
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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
Accés restringit per política de l'editorialWe 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 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
Accés obert -
Optical vortex streets
Molina Terriza, Gabriel; Petrov, D V; Torner Sabata, Lluís (2002-12)
Article
Accés restringit per política de l'editorial -
Orbital angular momentum of photons in noncollinear parametric downconversion
Molina Terriza, Gabriel; Pérez Torres, Juan; Torner Sabata, Lluís (2003-11)
Article
Accés restringit per política de l'editorialConservation 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
Accés restringit per política de l'editorialWe 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
Accés restringit per política de l'editorialWe 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
Accés restringit per política de l'editorialWe 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
Accés obertIn 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
Accés restringit per política de l'editorialA 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 ... -
Simultaneous frequency conversion and beam shaping for optical-tweezers applications
Molina Terriza, Gabriel; Torner Sabata, Lluís; Minardi, S; Trapani, P Di (2003-07)
Article
Accés restringit per política de l'editorialWe review a method which allows the simultaneous frequency-conversion and shaping of a light beam into a variety of patterns. The method is based on the controllable dynamics of vortices nested in the light beams. We outline ... -
Soliton algebra by vortex beam splitting
Minardi, Stefano; Molina Terriza, Gabriel; Di Trapani, Paolo; Pérez Torres, Juan; Torner Sabata, Lluís (2001-07)
Article
Accés restringit per política de l'editorialWe experimentally demonstrate the possibility of breaking up intense vortex light beams into stable and controllable sets of parametric solitons. We report observations performed in seeded second-harmonic generation, but ... -
Structural instability of vortices in Bose-Einstein-Condensates
Garcia Ripoll, Juan José; Molina Terriza, Gabriel; Perez García, Victor M.; Torner Sabata, Lluís (2001-09)
Article
Accés restringit per política de l'editorialIn this paper we study a gaseous Bose-Einstein condensate and show the following: (i) A minimum value of the interaction is needed for the existence of stable persistent currents. (ii) Vorticity is not a fundamental invariant ... -
Superposition of non-coaxial vortices in parametric wave mixing
Sukhorukov, A P; Kalinovich, A A; Molina Terriza, Gabriel; Torner Sabata, Lluís (2002-09)
Article
Accés restringit per política de l'editorialIn this paper we present a comprehensive study of the dynamics of screw phase dislocations under conditions of noncoaxial parametric three-wave mixing in the pump low-depletion regime. Under such conditions the signal and ... -
The curious arithmetic of optical vortices
Molina Terriza, Gabriel; Recolons Martos, Jaume; Torner Sabata, Lluís (2000-08-15)
Article
Accés restringit per política de l'editorialThe superposition of noncoaxial light beams containing screw wave-front dislocations is shown to create light patterns with a richer vortex content than that given by the arithmetic of the topological charges of the ... -
The curious arithmetic of optical vortices
Molina Terriza, Gabriel; Recolons Martos, Jaume; Torner Sabata, Lluís (Optical Society of America, 2000-08-15)
Article
Accés obertThe superposition of noncoaxial light beams containing screw wave-front dislocations is shown to create light patterns with a richer vortex content than that given by the arithmetic of the topological charges of the ... -
The spatial shape of entangled photon states in non-collinear, walking parametric downconversion
Pérez Torres, Juan; Molina Terriza, Gabriel; Torner Sabata, Lluís (2005-08)
Article
Accés restringit per política de l'editorialWe address the spatial shape of entangled photon states generated in spontaneous parametric downconversion in non-collinear geometries, when the interacting waves exhibit Poynting vector walk-off. We discuss how such shape ... -
Twisted photons
Molina Terriza, Gabriel; Pérez Torres, Juan; Torner Sabata, Lluís (2007-05)
Article
Accés restringit per política de l'editorialThe orbital angular momentum of light represents a fundamentally new optical degree of freedom. Unlike linear momentum, or spin angular momentum, which is associated with the polarization of light, orbital angular momentum ... -
Vortex evolution in parametric wave mixing
Petrov, D V; Molina Terriza, Gabriel; Torner Sabata, Lluís (1999-04)
Article
Accés obertWe investigate the evolution of vortex wave front dislocations in multiple-wave second-harmonic generation processes in quadratic nonlinear media. Vortices nested in finite-size host beams are shown to nucleate and to ... -
Vortex nucleation and evolution in parametric wave mixing
Molina Terriza, Gabriel; Torner Sabata, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1999)
Text en actes de congrés
Accés obertWe predict a variety of new phenomena, that includes the spontaneous nucleation of multiple vortex twins, vortex rotation and drift, vortex-antivortex interaction and annihilation, and formation of quasi-aligned patterns ...