Ara es mostren els items 55-74 de 129

    • 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
      Accés restringit per política de l'editorial
      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, ...
    • Measurement of sub-pulse-width temporal delays via spectral interference induced by weak value amplification 

      Salazar Serrano, L.J.; Janner, Davide; Brunner, Nicolas; Pruneri, Valerio; Pérez Torres, Juan (2014-01-27)
      Article
      Accés obert
      We demonstrate experimentally a scheme to measure small temporal delays, much smaller than the pulse width, between optical pulses. Specifically, we observe an interference effect, based on the concepts of quantum weak ...
    • Measurement of the temperature of atomic ensembles via which-way information 

      León Montiel, R.D.J.; Pérez Torres, Juan (2012-03-05)
      Article
      Accés restringit per política de l'editorial
      We unveil the relationship existing between the temperature of an ensemble of three-level atoms in a configuration, and the width of the emission cone of Stokes photons that are spontaneously emitted when atoms are ...
    • Measurement-based tailoring of Anderson localization of partially coherent light 

      Svozilik, Jiri; Perina, Jan; Pérez Torres, Juan (2014-05-08)
      Article
      Accés obert
      We put forward an experimental configuration to observe transverse Anderson localization of partially coherent light beams with a tunable degree of first-order coherence. The scheme makes use of entangled photons propagating ...
    • Measuring the translational and rotational velocities of particles in helical motion using structured light 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-06-30)
      Article
      Accés obert
      We measure the rotational and translational velocity components of particles moving in helical motion under a Laguerre-Gaussian mode illumination. The moving particle reflects light that acquires an additional frequency ...
    • Method for generating solitons sustained by competing nonlinearities by use of optical rectification 

      Pérez Torres, Juan; Palacios, S L; Torner Sabata, Lluís; Crasovan, L C; Mihalache, Dumitru; Biaggio, I (2002-09)
      Article
      Accés restringit per política de l'editorial
      We put forward a method for generating engineerable competing quadratic and cubic nonlinearities in suitable settings in which frequency generation is accompanied by optical rectification. The novel scheme is based on the ...
    • 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
      Accés restringit per política de l'editorial
    • Nanostep height measurement via spatial mode projection 

      Hermosa, Nathaniel; Rosales Guzmán, Carmelo; Pereira, S. F.; Pérez Torres, Juan (2014-01-15)
      Article
      Accés obert
      We demonstrate an optical scheme for measuring the thickness of thin nanolayers with the use of light beam ’ s spa- tial modes. The novelty in our scheme is the projection of the beam reflected by the sample onto a ...
    • New type of guided waves in birefringent media 

      Torner Sabata, Lluís; Pérez Torres, Juan; Mihalache, Dumitru (1993-02)
      Article
      Accés obert
      The existence of waves guided by thin dielectric films deposited over a positive birefringent crystal for waveguide parameters below usual cutoff is discussed. This additional kind of guided wave has a hybrid nature and ...
    • Noise-assisted energy transport in electrical oscillator networks with off-diagonal dynamical disorder 

      De León Montiel, J. Roberto; Quiroz Juarez, Mario A.; Quintero Torres, Rafael; Domínguez Juárez, Jorge Luis; Moya Cessa, Hector M.; Pérez Torres, Juan; ARAGÓN HERNÁNDEZ, JOSÉ LUÍS (Macmillan Publishers, 2015-11-27)
      Article
      Accés obert
      Noise is generally thought as detrimental for energy transport in coupled oscillator networks. However, it has been shown that for certain coherently evolving systems, the presence of noise can enhance, somehow unexpectedly, ...
    • Nonlinear hybrid guided waves in birefringent media 

      Pérez Torres, Juan; Torner Sabata, Lluís; Lederer, F.; Mihalache, Dumitru; Baboiu, Daniel; Ciumac, Mariana (1994-06)
      Article
      Accés restringit per política de l'editorial
      The waveguiding properties of nonlinear hybrid waves guided by integrated-optics structures containing both birefringent crystals and isotropic nonlinear media have been investigated. The existence of both TE- and TM-dominant ...
    • Observation of azimuthal modulation instability and formation of patterns of optical solitons in a quadratic nonlinear crystal 

      Petrov, Dimitri; Torner Sabata, Lluís; Martorell Pena, Jordi; Vilaseca Alavedra, Ramon; Pérez Torres, Juan; Cojocaru, Crina (1998-09)
      Article
      Accés restringit per política de l'editorial
      We report what is believed to be the first experimental demonstration of the azimuthal self-breaking of intense beams containing a vortex phase dislocation into sets of optical spatial solitons in a quadratic nonlinear ...
    • Observation of multiple soliton generation mediated by amplification of asymmetries 

      Carrasco Rodríguez, Sílvia; Polyakov, S; Kim, H; Jankovic, L; Stegeman, G I; Pérez Torres, Juan; Torner Sabata, Lluís; Katz, M; Eger, D (2003-04)
      Article
      Accés restringit per política de l'editorial
      We report the experimental observation of the formation of multiple optical quadratic solitons in a process mediated by the amplification of minute asymmetries in the diffraction properties of the input light. Experiments ...
    • Observation of self-trapping of light in walk-off compensating tandems 

      Carrasco Rodríguez, Sílvia; Petrov, D V; Pérez Torres, Juan; Torner Sabata, Lluís; Kim, H; Stegeman, G I; Zondy, J J (2004-02)
      Article
      Accés restringit per política de l'editorial
      We report the first experimental observation, to our knowledge, of the self-trapping of light in walk-off-compensating optical tandems. The experiment was conducted with picosecond light pulses in a ten-plate optically ...
    • 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
    • Observation of the orbital angular momentum spectrum of a light beam 

      Vasnetsov, M V; Pérez Torres, Juan; Petrov, D V; Torner Sabata, Lluís (2003-12)
      Article
      Accés restringit per política de l'editorial
      We demonstrate an experimental scheme that allows the elucidation of the orbital angular momentum discrete spectrum of an arbitrary light signal. The orbital angular momentum spectrum is represented in a Laguerre–Gaussian ...
    • On the stability of TE0 waves guided by thin films bounded by a nonlinear medium 

      Torner Sabata, Lluís; Pérez Torres, Juan; Mihalache, Dumitru; Baboiu, Daniel; Mazilu, Dumitru (1993-02)
      Article
      Accés restringit per política de l'editorial
      The authors show that investigations on the stability of nonlinear waves guided by planar structures greatly benefit when the conditions of marginal stability are considered on a suitable restricted parameter space. Relevant ...
    • On the use of structured light in nonlinear optics studies of the symmetry group of a crystal 

      Jauregui, Rocio; Pérez Torres, Juan (Macmillan Publishers, 2016-02-08)
      Article
      Accés obert
      We put forward a technique that allows to extract information about the symmetry group to which certain nonlinear crystals belong using a single illuminating beam. It provides such information by considering the outcome ...
    • Ondas te en medios saturables no lineales 

      Pérez Torres, Juan; Torner Sabata, Lluís (1992)
      Text en actes de congrés
      Accés obert
      We show that universal V- b diagrams provide a powerful too! when analysing the stationary properties of the TE waves guided by a thin film bounded by a saturable nonlinear substrate or cladding. Relevant information for ...
    • Optical coherence tomography with a nonlinear interferometer in the high parametric gain regime 

      Jiménez Machado, Gerard; Frascella, Gaetano; Pérez Torres, Juan; Chekhova, Maria (2020-08-31)
      Article
      Accés obert
      We demonstrate optical coherence tomography based on an SU(1,1) nonlinear interferometer with high-gain parametric down-conversion. For imaging and sensing applications, this scheme promises to outperform previous experiments ...