Now showing items 1-20 of 60

    • Vicencio Poblete, Rodrigo; Molina Gálvez, Mario; Kivshar, Yuri S. (2004)
      We study all-optical switching based on the dynamic properties of discrete vector solitons in waveguide arrays. We employ the concept of polarization mode instability and demonstrate simultaneous switching and amplification ...
    • Soto, Leopoldo; Zambra, Marcelo; Loewe, Marcelo; Gutiérrez Gallardo, Gonzalo; Molina Gálvez, Mario; Barra de la Guarda, Felipe; Lund Plantat, Fernando; Saavedra, Carlos; Haberle, Patricio (Institute of Physics (IoP), 2008)
      In the present work, an assessment of the Physics research capacity in Chile is presented. For this, the period between 2000 and June 2005 has been studied. In this period almost 200 physicists have contributed to ...
    • Naether, U.; Meyer, J. M.; Stützer, S.; Tünnermann, A.; Nolte, S.; Molina Gálvez, Mario; Szameit, A. (OPTICAL SOC AMER, 2012-02-15)
      We investigate experimentally the light evolution inside a two-dimensional finite periodic array of weakly coupled optical waveguides with a disordered boundary. For a completely localized initial condition away from the ...
    • Molina Gálvez, Mario (2011)
      We analyze numerically localization of light in linear square waveguide arrays restricted in one dimension ("ribbons"), whose boundaries are disordered in propagation constant and/or coupling. We find that the disordered ...
    • Molina Gálvez, Mario (American Physical Society, 2014)
      We examine the PT-symmetry-breaking transition for amagnetic metamaterial of a finite extent, modeled as an array of coupled split-ring resonators in the equivalent circuit model approximation. Small-size arrays are ...
    • Lazarides, N.; Molina Gálvez, Mario; Tsironis, G. P. (ELSEVIER SCIENCE BV, 2010-07-15)
      The existenceandstabilityofdiscretebreathersisstudiedtheoreticallyforamodelmagnetic metamaterialcomposedofaperiodicbinaryarrayofsplit-ringresonatorswithresonancefrequency mismatch.Itisdemonstratedthatbreatherscanbeexci ...
    • Gallo, N.; Molina Gálvez, Mario (IOP Publisihing, 2015)
      We examine bulk and surface bound states in the continuum (BIC), that is, square-integrable, localized modes embedded in the linear spectral band of a discrete lattice including interactions to first and second nearest ...
    • Molina Gálvez, Mario (ELSEVIER, 2008-11-17)
      We study localized modes on a single magnetic impurity positioned in the bulk or at the surface of a one-dimensional chain, in the presence of a magnetic field 8 acting at the impurity site. The strong on-site nonlinear ...
    • López González, Dany; Molina Gálvez, Mario (IOP Publishing Ltd., 2017)
      In this work we study analytically and numerically the spectrum and localization properties of three quasi-one-dimensional (ribbons) split-ring resonator arrays which possess magnetic flatbands, namely, the stub, Lieb and ...
    • Molina Gálvez, Mario (IOP Publishing, 2019)
      We introduce the basics of the Monte Carlo method that allows computing areas and definite integrals, by means of the generation of long sequences of random numbers. The areas of some nontrivial shapes are computed, ...
    • Vicencio Poblete, Rodrigo; Molina Gálvez, Mario; Kivshar, Yuri S. (Optical Society of America (OSA), 2003)
      A study was performed on controlled switching of discrete solitons in waveguide arrays. The study involved weak steplike modulation of the coupling strength in the array with the period larger than the waveguide spacing. ...
    • Castro, F. M.; Molina Gálvez, Mario; Deering, W. D. (ELSEVIER SCIENCE, 2003-10-15)
      We demonstrate how to improve the switching power and performance of all-optical nonlinear couplers by introducing linear control waveguides. In particular, we demonstrate this idea for a three-core coupler consisting of ...
    • Molina Gálvez, Mario (Springer-Verlag Berlin Heidelberg, 2013)
      We consider a simplified model of a nonlinear magnetic metamaterial, consisting of a weakly-coupled, periodic split-ring resonator (SRR) array capable of nonlinear capacitive response. We analyze three related problems: ...
    • Molina Gálvez, Mario; Kivshar, Yuri S. (OPTICAL SOC AMER, 2010-09-01)
      We analyze localization of light in honeycomb photonic lattices restricted in one dimension, which can be regarded as an optical analog of graphene nanoribbons. We discuss the effect of lattice topology on the properties ...
    • Molina Gálvez, Mario (Elsevier, 2020)
      We study the problem of constructing bulk and surface embedded modes (EMs) inside the quasi-continuum band of a square lattice, using a potential engineering approach a la Wigner and von Neumann. Building on previous results ...
    • Molina Gálvez, Mario; Vicencio Poblete, Rodrigo; Kivshar, Yuri S. (OPTICAL SOC AMER, 2006-06-01)
      We discuss the formation of self-trapped localized states near the edge of a semi-infinite array of nonlinear optical waveguides. We study a crossover from nonlinear surface states to discrete solitons by analyzing the ...
    • Molina Gálvez, Mario; Garanovich, Ivan L.; Sukhorukov, Andrey A.; Kivshar, Yuri S. (OPTICAL SOC AMER, 2006-08-01)
      We analyze discrete surface modes in semi-infinite binary waveguide arrays, which can support simultaneously two types of discrete solitons. We demonstrate that the analysis of linear surface states in such arrays provides ...
    • Vicencio Poblete, Rodrigo; Flach, Sergej; Molina Gálvez, Mario; Kivshar, Yuri S. (2007)
      We study nonlinear surface modes in two-dimensional anisotropic periodic photonic lattices and demonstrate that, in a sharp contrast to one-dimensional discrete surface solitons, the mode threshold power is lower at the ...
    • Savin, Alexander V.; Kivshar, Yuri S.; Molina Gálvez, Mario (Institute of Physics Publishing, 2018)
      © 2018 IOP Publishing Ltd.We study the electron transport in a deformable lattice modeled in the semiclassical approximation as a discrete nonlinear elastic chain where acoustic phonons are in thermal equilibrium at ...
    • Miroshnichenko, Andrey E.; Kivshar, Yuri S.; Vicencio Poblete, Rodrigo; Molina Gálvez, Mario (2005)
      We study resonant light scattering in arrays of channel optical waveguides in which tunable quadratic non-linearity is introduced as nonlinear defects by periodic poling of single (or several) waveguides in the array. We ...