Browsing by Author "XX676829"

Now showing items 41-58 of 58

    • Observation of surface gap solitons in semi-infinite waveguide arrays 
      Rosberg, Christian R.; Neshev, Dragomir N.; Krolikowski, Wieslaw; Mitchell, Arnan; Vicencio Poblete, Rodrigo; Molina Gálvez, Mario; Kivshar, Yuri S. (AMERICAN PHYSICAL SOC, 2006-08-25)
      We report on the observation of surface gap solitons found to exist at the interface between uniform and periodic dielectric media with defocusing nonlinearity. We demonstrate strong self-trapping at the edge of a LiNbO3 ...
    • Optical surface modes in the presence of nonlinearity and disorder 
      Molina Gálvez, Mario; Lazarides, N.; Tsironis, G. P. (AMER PHYSICAL SOC, 2012-01-31)
      We investigate numerically the effect of the competition of disorder, nonlinearity, and boundaries on the Anderson localization of light waves in finite-size, one-dimensional waveguide arrays. Using the discrete ...
    • Phase Transition in PT Symmetric Active Plasmonic Systems 
      Mattheakis, Marios; Oikonomou, Thomas; Molina Gálvez, Mario; Tsironis, George P. (IEEE, 2016)
      Surface plasmon polaritons (SPPs) are coherent electromagnetic surface waves trapped on an insulator-conductor interface. The SPPs decay exponentially along the propagation due to conductor losses, restricting the SPPs ...
    • Polarization instability, steering, and switching of discrete vector solitons 
      Vicencio Poblete, Rodrigo; Molina Gálvez, Mario; Kivshar, Yuri S. (2005)
      We study the dynamics of discrete vector solitons in arrays of weakly coupled birefringent optical waveguides with cubic nonlinear response. We start with a modulational instability analysis, followed by approximate ...
    • Saturable impurity in an optical array: Green function approach 
      Molina Gálvez, Mario (American Physical Society, 2018)
      © 2018 American Physical Society. We examine a one-dimensional linear waveguide array containing a single saturable waveguide. By using the formalism of lattice Green functions, we compute in closed form the localized mode ...
    • Self-trapping transition for a nonlinear impurity within a linear chain 
      Yue, Haitian; Molina Gálvez, Mario; Kevrekidis, Panayotis G.; Karachalios, Nikos I. (American Institute of Physics Inc., 2014)
      © 2014 AIP Publishing LLC.In the present work, we revisit the issue of the self-trapping dynamical transition at a nonlinear impurity embedded in an otherwise linear lattice. For our Schrödinger chain example, we present ...
    • Solitons in a modi ed discrete nonlinear Schrödinger equation 
      Molina Gálvez, Mario (Nature, 2018)
      We study the bulk and surface nonlinear modes of a modi ed one-dimensional discrete nonlinear Schrödinger (mDNLS) equation. A linear and a modulational stability analysis of the lowest- order modes is carried out. While ...
    • Spatially localized modes in two-dimensional chirped photonic lattices 
      Molina Gálvez, Mario; Kartashov, Yaroslav V.; Torner, Lluis; Kivshar, Yuri S. (AMER PHYSICAL SOC, 2008-05)
      We numerically study both linear and nonlinear surface modes in semi-infinite chirped two-dimensional photonic lattices in the framework of an effective discrete nonlinear model. We demonstrate that the lattice chirp can ...
    • Surface Bound States in the Continuum 
      Molina Gálvez, Mario; Miroshnichenko, Andrey E.; Kivshar, Yuri S. (AMER PHYSICAL SOC, 2012-02-13)
      We introduce a novel concept of surface bound states in the continuum, i.e., surface modes embedded into the linear spectral band of a discrete lattice. We suggest an efficient method for creating such surface modes and ...
    • Surface solitons in chirped photonic lattices 
      Molina Gálvez, Mario; Kartashov, Yaroslav V.; Torner, Lluis; Kivshar, Yuri S. (2007)
      We study surface modes at the edge of a semi-infinite chirped photonic lattice in the framework of an effective discrete nonlinear model. We demonstrate that the lattice chirp can change dramatically the conditions for the ...
    • Surface solitons in quasiperiodic nonlinear photonic lattices 
      Martínez, Alejandro J.; Molina Gálvez, Mario (AMER PHYSICAL SOC, 2012-01-04)
      We study discrete surface solitons in semi-infinite, one-dimensional, nonlinear (Kerr), quasiperiodic waveguide arrays of the Fibonacci and Aubry-Andre types, and explore different families of localized surface modes, as ...
    • Switching of discrete optical solitons in engineered waveguide arrays 
      Vicencio Poblete, Rodrigo; Molina Gálvez, Mario; Kivshar, Yuri S. (2004)
      An effective method for controlling nonlinear switching of discrete solitons in arrays of weakly coupled optical waveguides was discussed. The key ideas of the array engineering by means of a steplike variation of the ...
    • The fractional nonlinear PT dimer 
      Molina Gálvez, Mario (Nature, 2021)
      We examine a fractional discrete nonlinear Schrodinger dimer, where the usual first-order derivative in the time evolution is replaced by a non integer-order derivative. The dimer is nonlinear (Kerr) and PT-symmetric, and ...
    • The magnetoinductive dimer 
      Molina Gálvez, Mario (2013)
      In this paper, we examine a nonlinear magnetoinductive dimer and compute its linear and nonlinear symmetric, antisymmetric and asymmetric modes in closed-form, in the rotating-wave approximation. A linear stability analysis ...
    • The two-dimensional fractional discrete nonlinear Schrödinger equation 
      Molina Gálvez, Mario (Elsevier, 2020)
      We study a fractional version of the two-dimensional discrete nonlinear Schrodinger (DNLS) equation, where the usual discrete Laplacian is replaced by its fractional form that depends on a fractional exponent s that ...
    • Topology-driven nonlinear switching in Möbius discrete arrays 
      Muñoz, Francisco J.; Turitsyn, Sergei K.; Kivshar, Yuri S.; Molina Gálvez, Mario (American Physical Society, 2017)
      © 2017 American Physical Society.We examine the switching dynamics of discrete solitons propagating along two coupled discrete arrays which are twisted to form a Möbius strip. We analyze the potential of the topological ...
    • Two-color discrete localized modes and resonant scattering in arrays of nonlinear quadratic optical waveguides 
      Molina Gálvez, Mario; Vicencio Poblete, Rodrigo; Kivshar, Yuri S. (2005)
      We analyze the properties and stability of two-color discrete localized modes in arrays of channel waveguides where tunable quadratic nonlinearity is introduced as a nonlinear defect by periodic poling of a single waveguide ...
    • Vortex solitons of the discrete Ginzburg-Landau equation 
      Mejía Cortés, Cristian; Soto Crespo, J. M.; Vicencio Poblete, Rodrigo; Molina Gálvez, Mario (AMER PHYSICAL SOC, 2011-04-29)
      We have found several families of vortex soliton solutions in two-dimensional discrete dissipative systems governed by the cubic-quintic complex Ginzburg-Landau equation. There are symmetric and asymmetric solutions, and ...