Now showing items 1-12 of 419

    • Reversible self-replication of spatiotemporal Kerr cavity patterns 

      Benadouda Ivars, Salim; Kartashov, Yaroslav V.; Torner Sabata, Lluís; Conejero Casares, José Alberto; Milian Enrique, Carles (American Institute of Physics (AIP), 2021-02-12)
      Article
      Open Access
      We uncover a novel and robust phenomenon that causes the gradual self-replication of spatiotemporal Kerr cavity patterns in cylindrical microresonators. These patterns are inherently synchronized multifrequency combs. Under ...
    • Quantum-inspired Fredkin gate based on spatial modes of light 

      Urrego González, Daniel Fernando; López Mago, Dorilian; Vicuña Hernández, Verónica; Pérez Torres, Juan (2020-04-27)
      Article
      Open Access
      Insights gained from quantum physics can inspire novel classical technologies. These quantum-inspired technologies are protocols that aim at mimicking particular features of quantum algorithms. They are generally easier ...
    • Optical coherence tomography with a nonlinear interferometer in the high parametric gain regime 

      Jiménez Machado, Gerard; Frascella, Gaetano; Pérez Torres, Juan; Chekhova, Maria (2020-08-31)
      Article
      Open Access
      We demonstrate optical coherence tomography based on an SU(1,1) nonlinear interferometer with high-gain parametric down-conversion. For imaging and sensing applications, this scheme promises to outperform previous experiments ...
    • Frequency-correlation requirements on the biphoton wave function in an induced-coherence experiment between separate sources 

      Rojas Santana, Arturo; Jiménez Machado, Gerard; López Mago, Dorilian; Pérez Torres, Juan (American Physical Society, 2020-11-11)
      Article
      Open Access
      There is renewed interest in using the coherence between beams generated in separate down- converter sources for new applications in imaging, spectroscopy, microscopy and optical coherence tomography (OCT). These schemes ...
    • Nonlinearity-induced photonic topological insulator 

      Maczewsky, Lukas J.; Heinrich, Matthias; Kremer, Mark; Ivanov, Seergey K.; Ehrhardt, Max; Martínez, Franklin; Kartashov, Yaroslav V.; Konotop, Vladimir V.; Torner Sabata, Lluís; Bauer, Dieter; Szameit, Alexander (2020-11-06)
      Article
      Open Access
      A hallmark feature of topological insulators is robust edge transport that is impervious to scattering at defects and lattice disorder. We demonstrate a topological system, using a photonic platform, in which the existence ...
    • Spiraling vortices in exciton-polariton condensates 

      Ma, Xuekai; Kartashov, Yaroslav V.; Gao, Tingge; Torner Sabata, Lluís; Schumacher, Stefan (American Physical Society (APS), 2020-07-23)
      Article
      Open Access
      We introduce the phenomenon of spiraling vortices in driven-dissipative (nonequilibrium) exciton-polariton condensates excited by a nonresonant pump beam. At suitable low pump intensities, these vortices are shown to spiral ...
    • Ultrashort pulse characterisation with SHG collinear-FROG 

      Amat Roldán, Iván; Cormack, Iain G.; Loza Álvarez, Pablo; Gualda Manzano, Emilio José; Artigas García, David (2004-03)
      Article
      Open Access
      We outline criteria for fast and accurate acquisition of collinear FROG (CFROG) trace and how it can be transformed into the more traditional noncollinear FROG trace. The CFROG has an intrinsically simple geometry that ...
    • 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 ...
    • 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 ...
    • 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
      Open Access
      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 ...