Recent Submissions

  • 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
    Open Access
    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 ...
  • Angular control of anisotropy-induced bound states in the continuum 

    Mukherjee, Samyobrata; Gomis Bresco, Jordi; Pujol Closa, Maria del Pilar; Artigas García, David; Torner Sabata, Lluís (2019-11-01)
    Article
    Open Access
    Radiation of leaky modes existing in anisotropic waveguides can be cancelled by destructive interference at special propagation directions relative to the optical axis orientation, resulting in fully bound states surrounded ...
  • Random number generation by coherent detection of quantum phase noise 

    Álvarez, Juan Rafael; Sarmiento Hernández, Samael; Lázaro Villa, José Antonio; Gené Bernaus, Joan M.; Pérez Torres, Juan (2020-02-17)
    Article
    Open Access
    In 2010 Qi et al. [Opt. Lett. 35(3), 312 (2010)] demonstrated a random number generator based on the drift of the phase of a laser due to spontaneous emission, The out-of-the-lab implementation of this scheme presents two ...
  • Localization and delocalization of light in photonic moiré lattices 

    Wang, Peng; Zheng, Yuanlin; Chen, Xianfeng; Huang, Changming; Kartashov, Yaroslav V.; Torner Sabata, Lluís; Konotop, Vladimir V.; Ye, Fangwei (Macmillan Publishers, 2020-01-02)
    Article
    Restricted access - publisher's policy
    Moiré lattices consist of two superimposed identical periodic structures with a relative rotation angle. Moiré lattices have several applications in everyday life, including artistic design, the textile industry, architecture, ...
  • Robust ultrashort light bullets in strongly twisted waveguide arrays 

    Milián, Carles; Kartashov, Yaroslav V.; Torner Sabata, Lluís (American Institute of Physics (AIP), 2019-09-27)
    Article
    Open Access
    We introduce a new class of stable light bullets that form in twisted waveguide arrays pumped with ultrashort pulses, where twisting offers a powerful knob to tune the properties of localized states. We find that, above a ...
  • Conformal transformation of Dyakonov surface waves into bound states of cylindrical metamaterials 

    Kajorndejnukul, Veerachart; Artigas García, David; Torner Sabata, Lluís (American Physical Society (APS), 2019-11-05)
    Article
    Open Access
    We put forward the use of transformation optics to map surface waves that exist as one-dimensional modes supported by anisotropic structures into bound states in two-dimensional geometries. Specifically, we show the conformal ...
  • 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
    Open Access
    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 ...
  • Temperature-controlled entangled-photon absorption spectroscopy 

    De León Montiel, J. Roberto; Svozilik, Jirí; Pérez Torres, Juan; U’Ren, Alfred B. (American Institute of Physics (AIP), 2019-07-09)
    Article
    Open Access
    Entangled two-photon absorption spectroscopy (TPA) has been widely recognized as a powerful tool for revealing relevant information about the structure of complex molecular systems. However, to date, the experimental ...
  • 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
    Open Access
    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 ...
  • Hong-Ou-Mandel interferometry on a biphoton beat note 

    Chen, Yuanyuan; Fink, Matthias; Steinlechner, Fabian; Pérez Torres, Juan; Ursin, Rupert (2019-05-24)
    Article
    Open Access
    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 ...
  • Metastability of quantum droplet clusters 

    Kartashov, Yaroslav V.; Malomed, Boris A.; Torner Sabata, Lluís (American Institute of Physics (AIP), 2019-05-14)
    Article
    Open Access
    We show that metastable ring-shaped clusters can be constructed from two-dimensional quantum droplets in systems described by the Gross-Pitaevskii equations augmented with Lee-Huang-Yang quantum corrections. The clusters ...
  • Spatial mode detection by frequency upconversion 

    Sephton, Bereneice; Vallés Marín, Adam; Steinlechner, Fabian; Konrad, Thomas; Pérez Torres, Juan; Roux, Filippus S.; Forbes, Andrew (2019-02-01)
    Article
    Open Access
    The efficient creation and detection of spatial modes of light has become topical of late, driven by the need to increase photon bit-rates in classical and quantum communications. Such mode creation/detection is traditionally ...

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