Enviaments recents

  • Engineering of effective quadratic and cubic nonlinearities in two-period QPM gratings 

    Bang, O; B. CLAUSEN, CARL; Torner Sabata, Lluís (OPTICAL SOCIETY OF AMERICA, 2000)
    Text en actes de congrés
    Accés obert
    Summary form only given. Quasi-phase-matching (QPM) by electric-field poling in ferro-electric materials, such as LiNbO/sub 3/, is promising due to the possibilities of engineering the photolithographic mask, and thus the ...
  • 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 obert
    We 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 ...
  • Trapping of light beams and formation of spatial solitary waves in quadratic nonlinear media 

    Torner Sabata, Lluís; Torruellas, W; Stegeman, G; Menyuk, C; Wright, E (Institute of Electrical and Electronics Engineers (IEEE), 1996)
    Text en actes de congrés
    Accés obert
    Summary form only given. In this paper we report the outcome of our comprehensive investigations to study the dynamics of the beam trapping in both bulk crystals and optical planar waveguides made of quadratic nonlinear ...
  • A measure of flow vorticity with twisted beams of light 

    Belmonte Molina, Aniceto; Rosales Guzmán, Carmelo; Pérez Torres, Juan (Curran, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The measurement of vorticity, a parameter providing local measurements of rotation at every point in a flow, would greatly assist research fields as diverse as biology microfluidics, complex motions in the oceanic and ...
  • Sensitivity study of the microwave spiralimetric imaging 

    Jofre Roca, Lluís; Blanch Boris, Sebastián; Cardama Aznar, Ángel; Rius Casals, Juan Manuel; Torner Sabata, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2005)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The use of the spiral modes-electromagnetically related to the orbital momentum of the photons- at microwave frequencies for imaging purposes is studied and some preliminary numerical and experimental results for basic ...
  • Observation of Dyakonov surface waves 

    Takayama, Osamu; Crasovan, I; Artigas García, David; Torner Sabata, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Summary form only given. A special type of surface wave was predicted by M. I. Dyakonov in 1988. Such waves exist under special conditions at the interface of transparent anisotropic materials, and hens they are lossless. ...
  • Observation of two-dimensional spatial solitary waves in a ¿ (2) medium 

    Torruellas, William; Stegeman, George; Torner Sabata, Lluís (IEEE Press, 1995)
    Text en actes de congrés
    Accés obert
    Cascaded second order nonlinear processes offer a new range of opportunities. Indeed we have shown that under near phase matching conditions, the associated nonlinear phase distortion to the fundamental wave depletion ...
  • Optical metrology with structured light 

    Rosales Guzmán, Carmelo; Belmonte Molina, Aniceto; Pérez Torres, Juan (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this work we will review some of the novel applications, recently proposed, where the use of structured light has played a crucial role. First, in the field of laser remote sensing, we discuss about a technique that ...
  • Soliton content with quadratic nonlinearities 

    Artigas García, David; Torner Sabata, Lluís; Pérez Torres, Juan; Mihalache, Dumitru; Mazilu, Dumitru (Optical Society of American (OSA), 1999)
    Comunicació de congrés
    Accés obert
    Summary form only given. Quadratic solitons, that form through cascading in materials with second-order nonlinearities, are a topic of current intense investigation. Solitons have been observed in second harmonic generation ...
  • 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 ...

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