Now showing items 1-20 of 69

    • All-optical switching and amplification of discrete vector solitons in nonlinear cubic birefringent waveguide arrays 

      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 ...
    • Analysis and Projections of Physics in Chile 

      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 ...
    • Anderson localization in a periodic photonic lattice with a disordered boundary 

      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 ...
    • Boundary-induced Anderson localization in photonic lattices 

      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 ...
    • Bounded dynamics in finite PT -symmetric magnetic metamaterials 

      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 ...
    • Breathers inone-dimensional binary metamaterial models 

      Lazarides, N.; Molina Gálvez, Mario; Tsironis, G. P. (ELSEVIER SCIENCE BV, 2010-07-15)
      The existenceandstabilityofdiscretebreathersisstudiedtheoreticallyforamodelmagnetic metamaterialcomposedofaperiodicbinaryarrayofsplit-ringresonatorswithresonancefrequency mismatch.Itisdemonstratedthatbreatherscanbeexci ...
    • Bulk and surface bound states in the continuum 

      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 ...
    • Bulk and surface localized modes on a magnetic nonlinear impurity 

      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 ...
    • Bulk and surface magnetoinductive breathers in binary metamaterials 

      Molina Gálvez, Mario; Lazarides, N.; Tsironis, G. P. (2009)
      We investigate theoretically the existence of bulk and surface discrete breathers in a one-dimensional magnetic metamaterial comprised of a periodic binary array of split-ring resonators; the two types of resonators used ...
    • Compact modes in quasi one dimensional coupled magnetic oscillators 

      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 ...
    • Conductance through a single nonlinear impurity 

      Molina Gálvez, Mario; Bahlouli, H. (2002)
      We use the discrete nonlinear Schrödinger (DNLS) equation to describe tunneling through a single magnetic impurity connected to two perfect leads, in the presence of a magnetic field. Due to the presence of a strong on-site ...
    • Controlled switching of discrete solitons in waveguide arrays 

      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. ...
    • Controlling all-optical switching in multicore nonlinear couplers 

      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 ...
    • Defect Modes, Fano Resonances and Embedded States in Magnetic Metamaterials 

      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: ...
    • Dimensional crossover for the Bose-Einstein condensation 

      Molina Gálvez, Mario; Rössler, Jaime (Sociedad Mexicana de Fisica, 1998)
      We study Bose-Einstein condensation (BEC) for a non-interacting gas in a very anisotropic trap. Therefore, at enough small temperatures some degrees of freedom "freeze", thus reducing the "effective" dimensionality of the ...
    • Discrete and surface solitons in photonic graphene nanoribbons 

      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 ...
    • Discrete solitons and nonlinear surface modes in semi-infinite waveguide arrays 

      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 ...
    • Discrete surface solitons in semi-infinite binary waveguide arrays 

      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 ...
    • Discrete surface solitons in two-dimensional anisotropic photonic lattices 

      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 ...
    • Disorder-free weak dynamic localization in deformable lattices 

      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 ...