Now showing items 1-20 of 26

    • 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 ...
    • 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. ...
    • 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 ...
    • Fano resonance in quadratic waveguide arrays 

      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 ...
    • Impurity modes and wave scattering in discrete chains with nonlinear defect states 

      Molina Gálvez, Mario; Vicencio Poblete, Rodrigo; Kivshar, Yuri S. (ELSEVIER, 2006-01-30)
      We study the properties of localized impurity modes and the transmission of plane waves across a general nonlinear impurity embedded in an infinite one-dimensional linear chain. Using the formalism of the lattice Green ...
    • Interface localized modes and hybrid lattice solitons in waveguide arrays 

      Molina Gálvez, Mario; Kivshar, Yuri S. (2007)
      We discuss the formation of guided modes localized at the interface separating two different periodic photonic lattices. Employing the effective discrete model, we analyze linear and nonlinear interface modes and also ...
    • Interface solitons in quadratic nonlinear photonic lattices 

      Xu, Zhiyong; Molina Gálvez, Mario; Kivshar, Yuri S. (2009)
      We study the properties of two-color nonlinear localized modes which may exist at the interfaces separating two different periodic photonic lattices in quadratic media, focusing on the impact of phase mismatch of the ...
    • Interface solitons in two-dimensional photonic lattices 

      Molina Gálvez, Mario; Kivshar, Yuri S. (OPTICAL SOC AMER, 2008-12-01)
      We analyze localization of light at the interfaces separating square and hexagonal photonic lattices, as recently realized experimentally for two-dimensional laser-written waveguides in silica glass with self-focusing ...
    • Localized modes and bistable scattering in nonlinear network junctions 

      Miroshnichenko, Andrey E.; Molina Gálvez, Mario; Kivshar, Yuri S. (2007)
      We study the properties of junctions created by the crossing of N identical branches of linear discrete networks. We reveal that for N > 2 such a junction creates a topological defect and supports two types of spatially ...
    • Multistability and localization in coupled nonlinear split-ring resonators 

      Lazarides, Nikos; Molina Gálvez, Mario; Tsironis, George P.; Kivshar, Yuri S. (2009-09-14)
      We study the dynamics of a pair of nonlinear split-ring resonators (a ‘metadimer’) excited by an alternating magnetic field and coupled magnetically. Linear metadimers of this kind have been recently used as the elementary ...
    • Nonlinear localized modes at phase slips in two-dimensional photonic lattices 

      Molina Gálvez, Mario; Kivshar, Yuri S. (2009)
      We analyze the existence and stability of nonlinear modes localized at phase-slip waveguide channels and their intersections in two-dimensional photonic lattices with rectangular symmetry. While in linear lattices only one ...
    • Nonlinear localized modes at phase-slip defects in waveguide arrays 

      Molina Gálvez, Mario; Kivshar, Yuri S. (OPTICAL SOC AMER, 2008-05-01)
      We study light localization at a phase-slip defect created by two semi-infinite mismatched identical arrays of coupled optical waveguides. We demonstrate that the nonlinear defect modes possess the specific properties of ...
    • Observation of localized modes at phase slips in two-dimensional photonic lattices 

      Szameit, Alexander; Molina Gálvez, Mario; Heinrich, Matthias; Dreisow, Felix; Keil, Robert; Nolte, Stefan; Kivshar, Yuri S. (OPTICAL SOC AMER, 2010-08-15)
      We study experimentally light localization at phase-slip waveguides and at the intersection of phase-slips in a two-dimensional (2D) square photonic lattice. Such system allows to observe a variety of effects, including ...
    • 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 ...
    • 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 ...
    • 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 ...