Ponències/Comunicacions de congressos: Enviaments recents

Ara es mostren els items 1-12 de 28

    • Topology Transitions of Anisotropy Induced Bound States in the Continuum 

      Mukherjee, Samyobrata; Gomis Bresco, Jordi; Pujol Closa, Maria del Pilar; Artigas García, David; Torner Sabata, Lluís (2018)
      Text en actes de congrés
      Accés obert
      We demonstrate that Bound states In the Continuum (BICs) are supported in planar anisotropic structures where the optic axes are arbitrarily oriented. Moreover, we reveal fundamental new topological properties of these ...

    • Existence loci of bound states in the continuum in the parameter space of anisotropic planar structures 

      Mukherjee, Samyobrata; Gomis Bresco, Jordi; Pujol Closa, Maria del Pilar; Artigas García, David; Torner Sabata, Lluís (Optical Society of American (OSA), 2019)
      Comunicació de congrés
      Accés obert
      Bound states in the continuum (BICs), first predicted in the field of quantum physics [1], are localized radiationless states existing in the part of the spectrum that corresponds to radiative modes. BICs are a general ...

    • Waveguide stopped light mediated by mode transitions 

      Pujol Closa, Maria del Pilar; Gomis Bresco, Jordi; Gomez Diaz, J. Sebastian; Artigas García, David (Optical Society of American (OSA), 2019)
      Comunicació de congrés
      Accés obert
      Hyperbolic metamaterials (HMMs) are uniaxial materials that have hyperbolic dispersion curves. There are two types of hyperbolic metamaterials, type I that is described by a permittivity tensor with e|| < 0 and e¿ > 0, and ...

    • Complex light-assisted optical metrology techniques 

      Rosales Guzmán, Carmelo; Belmonte Molina, Aniceto; Pérez Torres, Juan (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The on-demand tailoring of the properties of light, such as phase, polarization or spatial shape, has completely changed the landscape of photonic-based applications. In this way, complex light fields have become an ...

    • Bound states in the continuum in anisotropic structures 

      Gomis Bresco, Jordi; Artigas García, David; Pujol Closa, Maria del Pilar; Torner Sabata, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We report theoretical and experimental observation of radiationless bound states in the continuum (BIC) in waveguiding anisotropic structures. BICs may have all possible polarizations and be the only possible boundstates ...

    • Conmutacion totalmente optica de ondas guiadas en medios virefring. 

      Santos Blanco, M. Concepción; Pérez Torres, Juan; Torner Sabata, Lluís (1993)
      Text en actes de congrés
      Accés obert
      A new kind of tunable all-optical guided-wave thresholding device using waveguides consisting of both birefringent linear media and isotropic nonlinear media is discussed. The behavior of the lower threshold with a suitable ...

    • Ondas híbridas en guías ópticas ultradelgadas 

      Ojeda, C.; Cid, J.; Torner Sabata, Lluís (1993)
      Text en actes de congrés
      Accés obert
      The existence conditions and waveguiding properties of new hybri.d, TE and TM dominant waves guided by ultrathin organic films cladded by birefringent crystals are reported

    • Sensores opticos integrados: una revision del estado actual del arte 

      Roca, J.; Torner Sabata, Lluís (Universitat Politècnica de València, 1993)
      Text en actes de congrés
      Accés obert
      The state of the art on integrated optical sensor technology is briefiy reviewed. Applications, problems to overcome, and potential in the future are introduced.

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

      Bang, O; Clausen, Carl B.; 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 ...