Enviaments recents

  • Cavity solitons in a microring dimer with gain and loss 

    Milián, Carles; Kartashov, Yaroslav V.; Skryabin, Dmitry V.; Torner Sabata, Lluís (2018-02-20)
    Article
    Accés restringit per política de l'editorial
    We address a pair of vertically coupled microring resonators with gain and loss pumped by a single-frequency field. Coupling between microrings results in a twofold splitting of the single microring resonance that increases ...
  • Lieb polariton topological insulators 

    Li, Chunyan; Ye, Fangwei; Chen, Xianfeng; Kartashov, Yaroslav V.; Ferrando, Albert; Torner Sabata, Lluís; Skryabin, Dmitry V. (American Physical Society, 2018-02-12)
    Article
    Accés obert
    We predict that the interplay between the spin-orbit coupling, stemming from the transverse electric–transverse magnetic energy splitting, and the Zeeman effect in semiconductor microcavities supporting exciton-polariton ...
  • Bound states in the continuum in a two-dimensional PT - symmetric system 

    Kartashov, Yaroslav V.; Milian, Carles; Konotop, Vladimir V; Torner Sabata, Lluís (2018-02-01)
    Article
    Accés restringit per política de l'editorial
    We address a 2D parity-time (¿¿)-symmetric structure built as a chain of waveguides, where all waveguides except for the central one are conservative, while the central one is divided into two halves with gain and losses. ...
  • STED imaging performance estimation by means of Fourier transform analysis 

    Merino, David; Mallabiabarrena, Arrate; Andilla, Jordi; Artigas García, David; Zimmermann, Timo; Loza Alvarez, Pablo (2017-05-01)
    Article
    Accés obert
    Due to relatively high powers used in STED, biological samples may be affected by the illumination in the process of image acquisition. Similarly, the performance of the system may be limited by the sample itself. Optimization ...
  • Bound states in the continuum in spin-orbit-coupled atomic systems 

    Kartashov, Yaroslav V.; Konotop, Vladimir V; Torner Sabata, Lluís (2017-09-14)
    Article
    Accés restringit per política de l'editorial
    We show that the interplay between spin-orbit coupling and Zeeman splitting in atomic systems can lead to the existence of bound states in the continuum (BICs) supported by trapping potentials. Such states have energies ...
  • Gap solitons on a ring 

    Kartashov, Yaroslav V.; Malomed, B A; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-12)
    Article
    Accés restringit per política de l'editorial
    We introduce a new species of gap solitons (GSs) supported by an azimuthally modulated guiding ring in defocusing cubic media. The periodicity in the azimuthal direction strongly modifies properties and existence domains ...
  • Four-wave mixing of light beams with engineered orbital angular momentum in cold cesium atoms 

    Barreiro, S; Tabosa, J W R; Pérez Torres, Juan; Deyanova, Y; Torner Sabata, Lluís (2004-07)
    Article
    Accés restringit per política de l'editorial
    We report an experimental demonstration that shows that the spatial structure carried by engineered coherent superpositions of light beams with orbital angular momentum can be mapped into the nonlinear polarization induced ...
  • Orbital angular momentum of entangled counterpropagating photons 

    Pérez Torres, Juan; Osorio Tamayo, Clara Inés; Torner Sabata, Lluís (2004-08)
    Article
    Accés restringit per política de l'editorial
    We elucidate the paraxial orbital angular momentum of entangled photon pairs generated by spontaneous parametric downconversion in different noncollinear geometries in which the entangled photons counterpropagate. We find, ...
  • Soliton eigenvalue control in optical lattices 

    Kartashov, Yaroslav V.; Crasovan, L C; Zelenina, A; Vyslokh, V V; Sanpera, Anna; Lewenstein, Maciej; Torner Sabata, Lluís (2004-09)
    Article
    Accés restringit per política de l'editorial
    We address the dynamics of higher-order solitons in optical lattices, and predict their self-splitting into the set of their single-soliton constituents. The splitting is induced by the potential introduced by the lattice, ...
  • Second harmonic generation tuning curves in quasiphase-matched potassium titanyl phosphate with narrow, high-intensity beams 

    Katz, M; Eger, D; Kim, H; Jankovic, L; Stegeman, G; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís (American Institute of Physics (AIP), 2003-06)
    Article
    Accés restringit per política de l'editorial
    The second harmonic generation (SHG) tuning curves with temperature and angle of incidence were measured in periodically poled KTiOPO4 for narrow fundamental beams at intensities typical of quadratic soliton generation. ...
  • Observation of optical vortex streets in walking-second harmonic generation 

    Molina Terriza, Gabriel; Dmitri, V Petrov; Recolons Martos, Jaume; Torner Sabata, Lluís (2002-04-15)
    Article
    Accés restringit per política de l'editorial
    We report what is believed to be the first experimental observation of spontaneous nucleation of arrays of optical vortices in the process of second-harmonic generation in a crystal with moderate Poynting vector walk-off, ...
  • Continuous-wave self-pumped optical parametric oscillator based on Yb3+-doped bulk periodically-poled LiNbO3 (Mg0) 

    Capmany, J; Callejo, D; Bermúdez, V; Diéguez, E; Artigas García, David; Torner Sabata, Lluís (2001-05-15)
    Article
    Accés restringit per política de l'editorial
    We present experimental evidence of continuous-wave self-pumped parametric oscillation in Yb3+-doped periodically poled lithium niobate co-doped with MgO. A single bulk crystal of periodically poled lithium niobate containing ...

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