Browsing by Author "2c07814a664c40fd831b99c0d5949e0c"
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Alloptical 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 alloptical 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, 20100901)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 semiinfinite waveguide arrays
Molina Gálvez, Mario; Vicencio Poblete, Rodrigo; Kivshar, Yuri S. (OPTICAL SOC AMER, 20060601)We discuss the formation of selftrapped localized states near the edge of a semiinfinite array of nonlinear optical waveguides. We study a crossover from nonlinear surface states to discrete solitons by analyzing the ... 
Discrete surface solitons in semiinfinite binary waveguide arrays
Molina Gálvez, Mario; Garanovich, Ivan L.; Sukhorukov, Andrey A.; Kivshar, Yuri S. (OPTICAL SOC AMER, 20060801)We analyze discrete surface modes in semiinfinite 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 twodimensional anisotropic photonic lattices
Vicencio Poblete, Rodrigo; Flach, Sergej; Molina Gálvez, Mario; Kivshar, Yuri S. (2007)We study nonlinear surface modes in twodimensional anisotropic periodic photonic lattices and demonstrate that, in a sharp contrast to onedimensional discrete surface solitons, the mode threshold power is lower at the ... 
Disorderfree 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 nonlinearity 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, 20060130)We study the properties of localized impurity modes and the transmission of plane waves across a general nonlinear impurity embedded in an infinite onedimensional 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 twocolor 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 twodimensional photonic lattices
Molina Gálvez, Mario; Kivshar, Yuri S. (OPTICAL SOC AMER, 20081201)We analyze localization of light at the interfaces separating square and hexagonal photonic lattices, as recently realized experimentally for twodimensional laserwritten waveguides in silica glass with selffocusing ... 
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 splitring resonators
Lazarides, Nikos; Molina Gálvez, Mario; Tsironis, George P.; Kivshar, Yuri S. (20090914)We study the dynamics of a pair of nonlinear splitring 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 twodimensional photonic lattices
Molina Gálvez, Mario; Kivshar, Yuri S. (2009)We analyze the existence and stability of nonlinear modes localized at phaseslip waveguide channels and their intersections in twodimensional photonic lattices with rectangular symmetry. While in linear lattices only one ... 
Nonlinear localized modes at phaseslip defects in waveguide arrays
Molina Gálvez, Mario; Kivshar, Yuri S. (OPTICAL SOC AMER, 20080501)We study light localization at a phaseslip defect created by two semiinfinite 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 twodimensional photonic lattices
Szameit, Alexander; Molina Gálvez, Mario; Heinrich, Matthias; Dreisow, Felix; Keil, Robert; Nolte, Stefan; Kivshar, Yuri S. (OPTICAL SOC AMER, 20100815)We study experimentally light localization at phaseslip waveguides and at the intersection of phaseslips in a twodimensional (2D) square photonic lattice. Such system allows to observe a variety of effects, including ... 
Observation of surface gap solitons in semiinfinite waveguide arrays
Rosberg, Christian R.; Neshev, Dragomir N.; Krolikowski, Wieslaw; Mitchell, Arnan; Vicencio Poblete, Rodrigo; Molina Gálvez, Mario; Kivshar, Yuri S. (AMERICAN PHYSICAL SOC, 20060825)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 selftrapping 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 twodimensional chirped photonic lattices
Molina Gálvez, Mario; Kartashov, Yaroslav V.; Torner, Lluis; Kivshar, Yuri S. (AMER PHYSICAL SOC, 200805)We numerically study both linear and nonlinear surface modes in semiinfinite chirped twodimensional photonic lattices in the framework of an effective discrete nonlinear model. We demonstrate that the lattice chirp can ...