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Ara es mostren els items 33-52 de 129

    • Gaussian-beam excitation of 3d nonlinear waves 

      Mihalache, Dumitru; Baboiu, Daniel; Mazilu, Dumitru; Torner Sabata, Lluís; Pérez Torres, Juan (1994-07)
      Article
      Accés restringit per política de l'editorial
      The propagation of stationary three-dimensional nonlinear guided waves and of Gaussian beams in a slab waveguide in which the cladding displays both Kerr-law and saturable instantaneous self-focusing nonlinearities is ...

    • Generating ultra-broadband biphotons via chirped QPM down-conversion 

      Teich, M C; Nasr, M B; Carrasco, S; Saleh, B E A; Sergienko, A V; Pérez Torres, Juan; Torner Sabata, Lluís; Hum, D S; Fejer, M M (2008-12)
      Article
      Accés restringit per política de l'editorial
      Nonlinear Optics: Nonlinear optical response has enhanced our ability to produce coherent light throughout the optical spectral region.

    • Generation of multicolor spatial solitons with pulsed light 

      Carrasco Rodríguez, Sílvia; Pérez Torres, Juan; Artigas García, David; Torner Sabata, Lluís (2001-05)
      Article
      Accés restringit per política de l'editorial
      The impact of temporal effects to the generation of multiple wave quadratic spatial solitons with pulsed light is shown. We examine soliton formation under conditions of second-harmonic generation but our conclusions are ...

    • Generation of polarization-entangled photon pairs in a Bragg reflection waveguide 

      Valles Marin, Adam; Hendrych, M.; Svozilik, Jiri; Machulka, R.; Abolghasem, P.; Kang, D.; Bijlani, B.J.; Helmy, A.S.; Pérez Torres, Juan (2013-06)
      Article
      Accés obert
      We demonstrate experimentally that spontaneous parametric down-conversion in an AlxGa1−xAs semiconductor Bragg reflection waveguide can make for paired photons highly entangled in the polarization degree of freedom at the ...

    • Generation of tunable entanglement and violation of a Bell-like inequality between different degrees of freedom of a single photon 

      Vallés, Adam; Ambrosio, Vincenzo D'; Hendrych, Martin; Micuda, Micha; Marrucci, Lorenzo; Sciarrino, Fabio; Pérez Torres, Juan (American Physical Society, 2014-11-20)
      Article
      Accés obert

    • Globally-linked vortex clusters 

      Crasovan, L C; Vekslerchik, V; Mihalache, Dumitru; Pérez Torres, Juan; Perez-Garcia, V M; Torner Sabata, Lluís (Kluwer, 2004-09-30)
      Capítol de llibre
      Accés restringit per política de l'editorial
      We show the existence of a rich variety of fully stationary vortex structures made of an increasing number of vortices nested in paraxial wave fields confined by symmetric and asymmetric harmonic trapping potentials in ...

    • Guided to leaky mode transition in uniaxial optical slab waveguides 

      Torner Sabata, Lluís; Recolons Martos, Jaume; Pérez Torres, Juan (1993-10)
      Article
      Accés obert
      The guided-to-leaky hybrid mode transition in slab optical waveguides made on uniaxial crystals such as LiNbO/sub 3/, or LiTaO/sub 3/, is analyzed. Two different guided-to-leaky transitions have been identified, namely the ...

    • Guided-to-leaky mode transition in uniaxial optical slab waveguides 

      Torner Sabata, Lluís; Recolons Martos, Jaume; Pérez Torres, Juan (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1993-10-01)
      Article
      Accés obert
      The guided-to-leaky hybrid mode transition in slab optical waveguides made on uniaxial crystals such as LiNbO3, or LiTaO 3, is analyzed. Two different guided-to-leaky transitions have been identified, namely the ordinary ...

    • Helico-conical optical beams self-heal 

      Hermosa, N.; Rosales Guzmán, C.; Pérez Torres, Juan (2013-01)
      Article
      Accés obert
      An optical beam is said to be self-healing when, distorted by an obstacle, the beam corrects itself upon propagation. In this Letter we show, through experiments supported by numerical simulations, that Helico-conical ...

    • High spatial entanglement via chirped quasi-phase-matched optical parametric down-conversion 

      Svozilik, Jiri; Perina, Jr., Jan; Pérez Torres, Juan (2012-11)
      Article
      Accés obert
      By making use of the spatial shape of paired photons, parametric down-conversion allows the generation of two-photon entanglement in a multidimensional Hilbert space. How much entanglement can be generated in this way? In ...

    • Highly efficient noise-assisted energy transport in classical oscillator systems 

      Leon Montiel, R de J.; Pérez Torres, Juan (2013-05)
      Article
      Accés obert
      Photosynthesis is a biological process that involves the highly-efficient transport of energy captured from the sun to a reaction center, where conversion into useful biochemical energy takes place. Even though one can ...

    • Hong-Ou-Mandel interferometry on a biphoton beat note 

      Chen, Yuanyuan; Fink, Matthias; Steinlechner, Fabian; Pérez Torres, Juan; Ursin, Rupert (2019-05-24)
      Article
      Accés obert
      Hong-Ou-Mandel interference, the fact that identical photons that arrive simultaneously on different input ports of a beam splitter bunch into a common output port, can be used to measure optical delays between different ...

    • How to automate a kinematic mount using a 3D printed arduino-based system 

      Salazar Serrano, Luis Jose; Jiménez Machado, Gerard; Pérez Torres, Juan (2018-06-01)
      Article
      Accés obert
      We demonstrate a simple, flexible and cost-effective system to automatize most of the kinematic mounts available nowadays on the market. It combines 3D-printed components, an Arduino board, stepper motors and simple ...

    • Hybrid waves guided by ultrathin films 

      Torner Sabata, Lluís; Pérez Torres, Juan; Ojeda, C.; Mihalache, Dumitru (1995-09)
      Article
      Accés obert
      Abstract: The existence conditions and waveguiding properties of new hybrid, TE-dominant waveguide modes of properly tailored waveguides consisting on ultrathin films cladded by a positive birefringent crystal are analyzed. ...

    • Hyperentangled photon sources in semiconductor waveguides 

      Kang, D.; Helt, L. G.; Zhukovsky, Sergei V.; Pérez Torres, Juan; Sipe, J. E.; Helmy, A.S. (2014-02-19)
      Article
      Accés obert
      We propose and analyze the performance of a technique to generate mode and polarization hyperentangled photons in monolithic semiconductor waveguides using two concurrent type-II spontaneous parametric down-conversion ...

    • 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
      Accés restringit per política de l'editorial
      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 ...

    • Implementation of a spatial two-dimensional quantum random walk with tunable decoherence 

      Svozilik, Jiri; León Montiel, R.D.J.; Pérez Torres, Juan (2012-11)
      Article
      Accés obert
      We put forward a versatile and highly scalable experimental setup for the realization of discrete two-dimensional quantum random walks with a single-qubit coin and tunable degree of decoherence. The proposed scheme makes ...

    • Impurity solitons with quadratic nonlinearities 

      Clausen, C B; Pérez Torres, Juan; Torner Sabata, Lluís (1998-12)
      Article
      Accés restringit per política de l'editorial
      We find families of solitary waves mediated by parametric mixing in quadratic nonlinear media that are localized at point-defect impurities. Solitons localized at attractive impurities are found to be dynamically stable. ...

    • Knotting fractional-order knots with the polarization state of light 

      Pisanty, Emilio; Machado, Gerard J.; Vicuña-Hernández, Verónica; Picón, Antonio; Celi, Alessio; Pérez Torres, Juan; Lewenstein, Maciej (Nature, 2019-06-10)
      Article
      Accés obert
      The fundamental polarization singularities of monochromatic light are normally associated with invariance under coordinated rotations: symmetry operations that rotate the spatial dependence of an electromagnetic field by ...

    • Knotting fractional-order knots with the polarization state of light 

      Pisanty, Emilio; Jiménez Machado, Gerard; Vicuña Hernández, Verónica; Picón, Antonio; Celi, Alessio; Pérez Torres, Juan; Lewenstein, Maciej (2019-08-01)
      Article
      Accés obert
      The fundamental polarization singularities of monochromatic light are normally associated with invariance under coordinated rotations: symmetry operations that rotate the spatial dependence of an electromagnetic field by ...