Recent Submissions

  • Twisted toroidal vortex solitons in inhomogeneous media with repulsive nonlinearity 

    Kartashov, Yaroslav V.; Malomed, Boris A.; Shnir, Yasha; Torner Sabata, Lluís (2014-12-24)
    Article
    Open Access
    Toroidal modes in the form of so-called Hopfions, with two independent winding numbers, a hidden one (twist s), which characterizes a circular vortex thread embedded into a three-dimensional soliton, and the vorticity ...
  • Direction-sensitive transverse velocity measurement by phase-modulated structured light beams 

    Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-09-15)
    Article
    Restricted access - publisher's policy
    The use of structured light beams to detect the velocity of targets moving perpendicularly to the beam's propagation axis opens new avenues for remote sensing of moving objects. However, determining the direction of motion ...
  • Nano guiding of light using Dyakonov waves 

    Takayama, Osamu; Torner Sabata, Lluís; Artigas García, David (2014-12)
    Article
    Restricted access - publisher's policy
    This special issue of Optics & Photonics News highlights the most exciting peer-reviewed optics research to have emerged over the past 12 months.
  • Fast monitoring of in-vivo conformational changes in myosin using single scan polarization- SHG microscopy 

    Psilodimitrakopoulos, Sotiris; Loza Alvarez, Pablo; Artigas García, David (2014-12-01)
    Article
    Restricted access - publisher's policy
    Fast imaging of molecular changes under high-resolution and label-free conditions are essential for understanding in-vivo processes, however, current techniques are not able to monitor such changes in real time. Polarization ...
  • Tunable beam displacer 

    Salazar Serrano, Luis Jose; Valencia, Alejandra; Pérez Torres, Juan (2015-03-17)
    Article
    Open Access
    We report the implementation of a tunable beam displacer, composed of a polarizing beam splitter(PBS) and two mirrors, that divides an initially polarized beam into two parallel beams whose separation can be continuously ...
  • Unbreakable PT symmetry of solitons supported by inhomogeneous defocusing nonlinearity 

    Kartashov, Yaroslav V.; Malomed, Boris A.; Torner Sabata, Lluís (2014-09-01)
    Article
    Restricted access - publisher's policy
    We consider bright solitons supported by a symmetric inhomogeneous defocusing nonlinearity growing rapidly enough toward the periphery of the medium, combined with an antisymmetric gain-loss profile. Despite the absence ...
  • Resonant Bloch-wave beatings 

    Kartashov, Yaroslav; Vysloukh, Victor A.; Torner Sabata, Lluís (2014-07-01)
    Article
    Restricted access - publisher's policy
    We introduce Bloch-wave beatings in arrays of multimode periodically bent waveguides with a transverse refractive index gradient. The new phenomenon manifests itself in the periodic drastic increase of the amplitude of the ...
  • Efficient heralding of polarization-entangled photons from type-0 and type-II spontaneous parametric downconversion in periodically poled KTiOPO 4 

    Steinlechner, Fabian; Gilaberte, Marta; Jofre, Marc; Scheidl, Thomas; Pérez Torres, Juan; Pruneri, Valerio; Ursin, Rupert (2014-09-01)
    Article
    Restricted access - publisher's policy
    Ultrabright sources of entangled photon pairs with high heralding efficiency are an important step in the pursuit of high-bit-rate entanglement-base quantum key distribution, as well as an enabling tool for loss-sensitive ...
  • Three-dimensional hybrid vortex solitons 

    Driben, Rodislav; Kartashov, Yaroslav; Malomed, Boris A.; Meier, Torsten; Torner Sabata, Lluís (2014-06-16)
    Article
    Open Access
    We show, by means of numerical and analytical methods, that media with a repulsive nonlinearity which grows from the center to the periphery support a remarkable variety of previously unknown complex stationary and dynamical ...
  • Measuring the translational and rotational velocities of particles in helical motion using structured light 

    Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-06-30)
    Article
    Open Access
    We measure the rotational and translational velocity components of particles moving in helical motion under a Laguerre-Gaussian mode illumination. The moving particle reflects light that acquires an additional frequency ...

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