Exploració per tema "Optical wave guides"

Ara es mostren els items 21-31 de 31

    • Quantum light in topological photonic lattices 

      Morillas Rozas, Marcel (Universitat Politècnica de Catalunya, 2023-07-10)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Universitat Autònoma de Barcelona
      Quantum topological photonics has the potential to improve quantum information transmission without decoherence. In order to investigate what is the role of topology in the propagation of quantum states of light, we study ...

    • Reglas de escala para bifurcaciones en guías ópticas 

      Recolons Martos, Jaume; Torner Sabata, Lluís; Canal Bienzobas, Fernando (1990)
      Text en actes de congrés
      Accés obert

    • Reglas de similitud para modos TE en guias opticas no lineales 

      Torres, Josep Lluis; Torner Sabata, Lluís (1991)
      Text en actes de congrés
      Accés obert
      We have shown that the stationary propcrties of TE guided waves in a slab optical waveguidewith a nonlinear Kerr-likc bounding medium can be described in a compact way bymeans of the usual normalized effective modal index ...

    • Study of hybrid silicon/III-V photonic crystal nanolasers 

      Fortuny Requa, Llorenç (Universitat Politècnica de Catalunya, 2021-07-06)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Université Paris-Saclay
      At a time when computing resources, telecommunication requirements and data processing are exploding worldwide, nanophotonics has emerged in the last decade as an important tool that, together with microelectronics, provides ...

    • Supermode analysis of the three-waveguide nonlinear directional coupler: the critical power 

      Artigas García, David; Olivas Alguacil, Jesús; Dios Otín, Víctor Federico; Canal Bienzobas, Fernando (ELSEVIER SCIENCE BV, 1996-10-01)
      Article
      Accés obert
      The three-waveguide nonlinear directional coupler switching characteristic is studied using the eigenmodes of the structure (i.e. supermodes). This model, which is more exact than the one used in previous works, has allowed ...

    • Topological dipole Floquet solitons 

      Ivanov, Seergey K.; Kartashov, Yaroslav V.; Heinrich, Matthias; Szameit, Alexander; Torner Sabata, Lluís; Konotop, Vladimir V. (American Physical Society, 2021-05-11)
      Article
      Accés obert
      We theoretically introduce a type of topological dipole soliton propagating in a Floquet topological insulator based on a kagome array of helical waveguides. Such solitons bifurcate from two edge states belonging to different ...

    • 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 ...

    • Transformation Optics in Coupled Waveguides 

      Kumar, Shubham (Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2011-09-08)
      Projecte Final de Màster Oficial
      Accés obert
      English: The technique of transformation optics is applied to a system of three coupled waveguides undergoing adiabatic passage of a light beam. We show that it is possible, by applying different transformations to different ...

    • Transition from Dirac points to exceptional points in anisotropic waveguides 

      Gomis Bresco, Jordi; Artigas García, David; Torner Sabata, Lluís (American Physical Society, 2019-10-04)
      Article
      Accés obert
      We uncover the existence of Dirac and exceptional points in waveguides made of anisotropic materials, and study the transition between them. Dirac points in the dispersion diagram appear at propagation directions where the ...

    • Ultracompact vibrometry measurement with nanometric accuracy using optical feedback 

      Jha, Ajit; Azcona Guerrero, Francisco Javier; Royo Royo, Santiago (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The nonlinear dynamics of a semiconductor laser with optical feedback (OF) combined with direct current modulation of the laser is demonstrated to suffice for the measurement of subwavelength changes in the position of a ...

    • 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 ...