Amplitude [arb. units] y x Theory (2009)
Christian R. Rosberg, Dragomir N. Neshev, Yaroslav V. Kartashov, Rodrigo A. Vicencio, Wieslaw Krolikowski, Mario I. Molina, ...
tion, 3 as shown schematically in part (b) of the figure. For the first time to our knowledge, we observed the formation of surface gap solitons or nonlinear Tamm states. While linear surface modes...
Polarization conversion spectroscopy of hybrid modes (2009)
Nikitin, A. Yu., Artigas, David, Torner, Lluis, Garcia-Vidal, F. J., Martin-Moreno, L.
Enhanced polarization conversion in reflection for the Otto and Kretschmann configurations is introduced as a new method for hybrid-mode spectroscopy. Polarization conversion in reflection appears...
Vector solitons in nonlinear lattices (2009)
Kartashov, Yaroslav V., Malomed, Boris A., Vysloukh, Victor A., Torner, Lluis
We consider two-component solitons in a medium with a periodic modulation of the nonlinear coefficient. The modulation enables the existence of complex multihump vector states. In particular, vector...
Kartashov, Yaroslav V., Malomed, Boris A., Vysloukh, Victor A., Torner, Lluis
We address necklace solitons supported by circular waveguide arrays with out-of-phase modulation of nonlinearity and linear refractive index. Such two-dimensional necklace solitons appear as rings of...
Power-dependent soliton steering in thermal nonlinear media (2009)
Ye, Fangwei, Kartashov, Yaroslav V., Hu, Bambi, Torner, Lluis
We address the existence and properties of optical solitons excited in thermal nonlinear media with a transverse refractive index gradient. We show that in such a geometry one can generate...
Soliton shape and mobility control in optical lattices (2009)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We present a progress overview focused on the recent theoretical and experimental advances in the area of soliton manipulation in optical lattices. Optical lattices offer the possibility to engineer...
Light bullets in Bessel optical lattices with spatially modulated nonlinearity (2009)
Ye, Fangwei, Kartashov, Yaroslav V., Hu, Bambi, Torner, Lluis
We address the stability of light bullets supported by Bessel optical lattices with out-of-phase modulation of the linear and nonlinear refractive indices. We show that spatial modulation of the...
Walking vector soliton caging and releasing (2009)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address the formation and propagation of vector solitons in optical lattices in the presence of anisotropy-induced walk-off between ordinary and extraordinary polarized field components. Stable...
Parametric amplification of random lattice soliton swinging (2009)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We consider the propagation of solitons in media with an imprinted transverse periodic or parabolic refractive index modulation when the modulation depth slightly fluctuates along the propagation...
Light bullets in optical tandems (2009)
Torner, Lluis, Kartashov, Yaroslav V.
We address the concept of three-dimensional light bullet formation in structures where nonlinearity and dispersion are contributed by different materials, including metamaterials, which are used at...
Engineering soliton nonlinearities: From local to strongly nonlocal (2009)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We put forward a strategy to achieve synthetic nonlinearities where local and nonlocal contributions compete on similar footing, thus yielding intermediate tunable responses ranging from fully local...
Stable two-dimensional solitons in nonlinear lattices (2009)
Kartashov, Yaroslav V., Malomed, Boris A., Vysloukh, Victor A., Torner, Lluis
We address the existence and stability of two-dimensional solitons in optical or matter-wave media, which are supported by purely nonlinear lattices in the form of a periodic array of cylinders with...
Multipole surface solitons in layered thermal media (2008)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address the existence and properties of multipole solitons localized at a thermally insulating interface between uniform or layered thermal media and a linear dielectric. We find that in the case...
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address the evolution of higher-order excited states, such as vortex and multi-hump solitons, in nonlocal media with synthetic, competing focusing and defocusing nonlinearities with different...
Kartashov, Yaroslav V., Malomed, Boris A., Vysloukh, Victor A., Torner, Lluis
We introduce a new species of gap solitons (GSs) supported by an azimuthally modulated guiding ring in defocusing cubic media. The periodicity in the azimuthal direction strongly modifies properties...
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address vortex solitons supported by optical lattices featuring modulation of both the linear and nonlinear refractive indices. We find that when the modulation is out-of-phase the competition...
Nonlinear photonic crystals near the supercollimation point (2008)
Xu, Zhiyong, Maes, Bjorn, Jiang, Xunya, Joannopoulos, John D., Torner, Lluis, Soljacic, Marin
We uncover a strong coupling between nonlinearity and diffraction in a photonic crystal at the supercollimation point. We show this is modeled by a nonlinear diffraction term in a nonlinear...
Soliton modes, stability, and drift in optical lattices with spatially modulated nonlinearity (2008)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We put forward new properties of lattice solitons in materials and geometries where both, the linear refractive index and the nonlinearity are spatially modulated. We show that the interplay between...
Propagation of solitons in thermal media with periodic nonlinearity (2008)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address the existence and properties of solitons in layered thermal media made of alternating focusing and defocusing layers. Such structures support robust bright solitons even if the averaged...
Nonlinear switching of low-index defect modes in photonic lattices (2008)
Ye, Fangwei, Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address nonlinear signal switching between two low-index defect channels induced in periodic optical lattices. In contrast to conventional directional couplers, where the guiding mechanism is...
Bragg guiding of domain-like nonlinear modes and kink arrays in lower-index core structures (2008)
Ye, Fangwei, Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We introduce a novel class of stable nonlinear modes trapped in a lower-index film core sandwiched between two optical lattices, or in the cylindrical core of a radial lattice, imprinted in...
Brownian soliton motion (2008)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We reveal fundamental analogies between soliton dynamics in light-induced random photonic lattices and Brownian motion of particles. In particular, we discover that the average squared soliton...
Stabilization of dipole solitons in nonlocal nonlinear media (2008)
Ye, Fangwei, Kartashov, Yaroslav V., Torner, Lluis
We address the stabilization of dipole solitons in nonlocal nonlinear materials by two different approaches. First, we study the properties of such solitons in thermal nonlinear media, where the...
Surface lattice solitons in diffusive nonlinear media (2008)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address the properties of surface solitons supported by optical lattices imprinted in photorefractive media with asymmetric diffusion nonlinearity. Such solitons exist only in finite gaps of...
Nonlocal surface dipoles and vortices (2008)
Ye, Fangwei, Kartashov, Yaroslav V., Torner, Lluis
We predict the existence and address the stability of two-dimensional surface solitons featuring topologically complex shapes, including dipoles, vortices, and bound states of vortex solitons, at the...
Optical surface waves supported and controlled by thermal waves (2008)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address the formation of optical surface waves at the very edge of semiconductor materials illuminated by modulated light beams that generate thermal waves rapidly fading in the bulk material. We...
Nonlinear photonic crystals near the supercollimation point (2008)
Xu, Zhiyong, Maes, Björn, Jiang, Xunya, Joannopoulos, John D, Torner, Lluis, Soljacic, Marin
Surface solitons in two-dimensional chirped photonic lattices (2007)
Molina, Mario I., Kartashov, Yaroslav V., Torner, Lluis, Kivshar, Yuri S.
We study surface modes in semi-infinite chirped two-dimensional photonic lattices in the frame- work of an effective discrete nonlinear model. We demonstrate that the lattice chirp can change...
Highly-asymmetric soliton complexes in parabolic optical lattices (2007)
Kartashov, Yaroslav V., Vysloukh, Victor V., Torner, Lluis
We introduce multipole soliton complexes in optical lattices induced by nondiffracting parabolic beams. Despite the symmetry-breaking dictated by the curvature of the lattice channels, we find that...
Propagation and Control of Non-Canonical Optical Vortices (2007)
Gabriel Molina-terriza, Ewan M. Wright, Lluis Torner
We predict new features for the evolution of non-canonical screw wave front dislocations nested in diffracting light beams. The evolution equations for the location of single-charge dislocations are...
Self-Alchemy of Optical Vortices (2007)
Gabriel Molina-terriza, Jaume Recolons, Juan P. Torres, Lluis Torner, Ewan M. Wright
We report the experimental observation of the dynamic inversion of the topological charge of an optical vortex under propagation. The vortex self-transformation occurs through continuous deformation...
Ring surface waves in thermal nonlinear media (2007)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address ring-shaped surface waves supported by defocusing thermal media with circular cross-section. Such waves exist because of the balance between repulsion from the interface and deflection of...
Resonant mode flopping in modulated waveguiding structures (2007)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We put forward the concept of resonant, Rabi-like flopping and adiabatic transitions between confined light modes in properly modulated multimode waveguides. The phenomenon is shown to take place in...
Soliton percolation in random optical lattices (2007)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We introduce soliton percolation phenomena in the nonlinear transport of light packets in suitable optical lattices with random properties. Specifically, we address lattices with a gradient of the...
Dynamics of surface solitons at the edge of chirped optical lattices (2007)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address soliton formation at the edge of chirped optical lattices imprinted in Kerr-type nonlinear media. We find families of power thresholdless surface waves that do not exist at other types of...
Enhanced soliton interactions by inhomogeneous nonlocality and nonlinearity (2007)
Ye, Fangwei, Kartashov, Yaroslav V., Torner, Lluis
We address the interactions between optical solitons in the system with longitudinally varying nonlocality degree and nonlinearity strength. We consider a physical model describing light propagation...
Rotating surface solitons (2007)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We introduce a novel type of surface waves that form at the edge of guiding structures consisting of several concentric rings. Such surface waves rotate steadily upon propagation and, in contrast to...
Stability of vortex solitons in thermal nonlinear media with cylindrical symmetry (2007)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We analyze the salient features of vortex-ring solitons supported by cylindrically symmetric media with nonlocal thermal nonlinearity. We discover the existence of a maximum allowed topological...
Surface waves in defocusing thermal nonlinear optical media (2007)
Kartashov, Yaroslav V., Ye, Fangwei, Vysloukh, Victor A., Torner, Lluis
We predict that the interface of materials with defocusing thermal nonlinearities support stable fundamental and higher-order surface waves when the opposite edges of the medium are maintained at...
Guiding-center solitons in rotating potentials (2007)
Kartashov, Yaroslav V., Malomed, Boris A., Torner, Lluis
We demonstrate that rotating quasi-one-dimensional potentials, periodic or parabolic, support solitons in settings where they are otherwise impossible. Ground-state and vortex solitons are found in...
Soliton emission in amplifying optical lattice surfaces (2007)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address surface solitons supported by the interface of optical lattices imprinted in saturable media with surface-localized gain. The nonlinearity saturation puts restrictions on the maximal...
Observation of higher-order solitons in defocusing waveguide arrays (2007)
Smirnov, Eugene, Ruter, Christian E., Kip, Detlef, Kartashov, Yaroslav V., Torner, Lluis
We observe experimentally higher-order solitons in waveguide arrays with defocusing saturable nonlinearity. Such solitons can comprise several in-phase bright spots and are stable above a critical...
Gray spatial solitons in nonlocal nonlinear media (2007)
Kartashov, Yaroslav V., Torner, Lluis
We study gray solitons in nonlocal nonlinear media and show that they are stable and can form bound states. We reveal that gray soliton velocity depends on the nonlocality degree, and that it can be...
Surface solitons in chirped photonic lattices (2007)
Mario I. Molina, Yaroslav V. Kartashov, Lluis Torner, Yuri S. Kivshar
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...
Surface lattice kink solitons (2006)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We predict theoretically that surface of an optical lattice imprinted in defocusing nonlinear media can support shock, or kink waves. Such new surface waves contain a modulationally stable pedestal...
Vector soliton fission by reflection at nonlinear interfaces (2006)
Ye, Fangwei, Kartashov, Yaroslav V., Torner, Lluis
We address the reflection of vector solitons, comprising several components that exhibit multiple field oscillations, at the interface between two nonlinear media. We reveal that reflection causes...
Asymmetric matter-wave solitons at nonlinear interfaces (2006)
Ye, Fangwei, Kartashov, Yaroslav V., Torner, Lluis
We predict the existence and study the basic properties of strongly asymmetric matter wave solitons that form at the interface produced by regions with different inter-atomic interaction strengths in...
Matter-wave soliton control in optical lattices with topological dislocations (2006)
Kartashov, Yaroslav V., Torner, Lluis
We address the concept of guiding and transporting matter-wave solitons along the channels of optical lattices made by interference patterns of beams containing topological wavefront dislocations....
Two-dimensional multi-pole solitons in nonlocal nonlinear media (2006)
Rotschild, Carmel, Xu, Zhiyong, Cohen, Oren, Kartashov, Yaroslav V., Torner, Lluis, Segev, Mordechai
We present the experimental observation of scalar multi-pole solitons in highly nonlocal nonlinear media, including dipole-, tri-pole, quadru-pole, and necklace-type solitons, organized as arrays of...
Lattice-supported surface solitons in nonlocal nonlinear media (2006)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We reveal that lattice interfaces imprinted in nonlocal nonlinear media support surface solitons that do not exist in other similar settings, including interfaces of local and nonlocal uniform...
Vector mixed-gap surface solitons (2006)
Kartashov, Yaroslav V., Ye, Fangwei, Torner, Lluis
We elucidate the properties of mixed-gap vector surface solitons supported by the interface between a uniform medium and an optical lattice imprinted in a Kerr-type nonlinear media. The components of...
Generation of surface soliton arrays (2006)
Kartashov, Yaroslav V., Vysloukh, Victor A., Mihalache, Dumitru, Torner, Lluis
We discover that at the edge of optical lattice imprinted in saturable nonlinear media one-dimensional surface solitons exist only within a band of light intensities, and that they cease to exist...
Soliton control in fading optical lattices (2006)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We predict new phenomena, such as soliton steering and soliton fission, in optical lattices that fade away exponentially along the propagation direction. Such lattices, featuring tunable decay rates,...
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We address the impact of asymmetric nonlocal diffusion nonlinearity on the properties of gap solitons supported by photorefractive crystal with an imprinted optical lattice. We reveal how the...
Stabilization of vector soliton complexes in nonlocal nonlinear media (2006)
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We introduce vector soliton complexes in nonlocal Kerr-type nonlinear media. We discover that under proper conditions the combination of nonlocality and vectorial coupling has a remarkable...
Multipole-mode surface solitons (2006)
Kartashov, Yaroslav V., Torner, Lluis
We discover multipole-mode solitons supported by the surface between two distinct periodic lattices imprinted in Kerr-type nonlinear media. Such solitons are possible because the refractive index...
Surface waves at the interface between left-handed and birefringent materials (2006)
Crasovan, Lucian-Cornel, Takayama, Osamu, Artigas, David, Johansen, Steffen Kjaer, Mihalache, Dumitru, Torner, Lluis
We theoretically investigate the existence and properties of hybrid surface waves forming at interfaces between left-handed materials and dielectric birefringent media. The existence conditions of...
Multipole vector solitons in nonlocal nonlinear media (2006)
Kartashov, Yaroslav V., Vysloukh, Victor A., Mihalache, D., Torner, Lluis
We show that multipole solitons can be made stable via vectorial coupling in bulk nonlocal nonlinear media. Such vector solitons are composed of mutually incoherent nodeless and multipole components...
Bragg-type soliton mirror (2006)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We study soliton reflection/transmission at the interface between uniform medium and the optical lattice with focusing Kerr nonlinearity. We reveal that such interfaces afford rich new opportunities...
Surface vortex solitons (2006)
Kartashov, Yaroslav V., Egorov, Alexey A., Vysloukh, Victor A., Torner, Lluis
We discover the existence of vortex solitons supported by the surface between two optical lattices imprinted in Kerr-type nonlinear media. Such solitons can feature strongly noncanonical profiles,...
Multipole-mode solitons in Bessel optical lattices (2005)
Kartashov, Yaroslav V., Carretero-Gonzalez, R., Malomed, Boris A., Vysloukh, Victor A., Torner, Lluis
We study basic properties of quiescent and rotating multipole-mode solitons supported by axially symmetric Bessel lattices in a medium with defocusing cubic nonlinearity. The solitons can be found in...
Topological dragging of solitons (2005)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We put forward properties of solitons supported by optical lattices featuring topological dislocations, and show that solitons experience attractive and repulsive forces around the dislocations....
Shaping soliton properties in optical Mathieu lattices (2005)
Kartashov, Yaroslav V., Egorov, Alexey A., Vysloukh, Victor A., Torner, Lluis
We address basic properties and stability of two-dimensional solitons in photonic lattices induced by the nondiffracting Mathieu beams. Such lattices allow for smooth topological transformation of...
Soliton mobility in nonlocal optical lattices (2005)
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We address the impact of nonlocality in the physical features exhibited by solitons supported by Kerr-type nonlinear media with an imprinted optical lattice. We discover that nonlocality of nonlinear...
Upper threshold for stability of multipole-mode solitons in nonlocal nonlinear media (2005)
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We address the stability of multipole-mode solitons in nonlocal Kerr-type nonlinear media. Such solitons comprise several out-of-phase peaks packed together by the forces acting between them. We...
Soliton topology versus discrete symmetry in optical lattices (2005)
Kartashov, Yaroslav V., Ferrando, Albert, Egorov, Alexey A., Torner, Lluis
We address the existence of vortex solitons supported by azimuthally modulated lattices and reveal how the global lattice discrete symmetry has fundamental implications on the possible topological...
Controllable soliton dragging by dynamical optical lattices (2005)
Kartashov, Yaroslav V., Torner, Lluis, Christodoulides, Demetrios N.
We report on the phenomenon of controllable soliton dragging by dynamical optical lattices induced by three imbalanced interfering plane waves. Because of such an imbalance, the transverse momentum...
Swinging of two-dimensional solitons in harmonic and Bessel optical lattices (2005)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We consider parametric amplification of two-dimensional spatial soliton swinging in longitudinally modulated harmonic and Bessel lattices in Kerr-type saturable medium. We show that soliton center...
Reconfigurable soliton networks optically-induced by arrays of nondiffracting Bessel beams (2005)
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We address the propagation of solitons in reconfigurable two-dimensional networks induced optically by arrays of nondiffracting Bessel beams in Kerr-type nonlinear media. We show that broad soliton...
Soliton control in chirped photonic lattices (2005)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We study optical solitons in chirped periodic optical lattices whose amplitude or frequency changes in the transverse direction. We discover that soliton propagation in such lattices can be...
Xu, Zhiyong, Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We put forward the concept of reconfigurable structures optically induced by mutually incoherent nondiffracting Bessel beams in Kerr-type nonlinear media. We address collinear couplers and...
Stable one-dimensional periodic waves in Kerr-type saturable and quadratic nonlinear media (2005)
Kartashov, Yaroslav V., Egorov, Alexey A., Vysloukh, Victor A., Torner, Lluis
We review the latest progress and properties of the families of bright and dark one-dimensional periodic waves propagating in saturable Kerr-type and quadratic nonlinear media. We show how saturation...
Stable multicolor periodic-wave arrays (2005)
Kartashov, Yaroslav V., Egorov, Alexey A., Zelenina, Anna S., Vysloukh, Victor A., Torner, Lluis
We study the existence and stability of cnoidal periodic wave arrays propagating in uniform quadratic nonlinear media and discover that they become completely stable above a threshold light...
Optical Vortices and Vortex Solitons (2005)
Desyatnikov, Anton S., Torner, Lluis, Kivshar, Yuri S.
Optical vortices are phase singularities nested in electromagnetic waves that constitute a fascinating source of phenomena in the physics of light and display deep similarities to their close...
Broadband light generation by noncollinear parametric (2005)
Silvia Carrasco, Magued B. Nasr, Er V. Sergienko, Malvin C. Teich, Juan P. Torres, ...
downconversion
Multicolor vortex solitons in two-dimensional photonic lattices (2004)
Xu, Zhiyong, Kartashov, Yaroslav V., Crasovan, Lucian-Cornel, Mihalache, Dumitru, Torner, Lluis
We report on the existence and stability of multicolor lattice vortex solitons constituted by coupled fundamental frequency and second-harmonic waves in optical lattices in quadratic nonlinear media....
Composite vortex-ring solitons in Bessel photonic lattices (2004)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We reveal the existence of dynamically stable composite topological solitons in Bessel photonic lattices imprinted in focusing Kerr-type nonlinear media. The new stable composite solitons are made of...
Stable ring vortex solitons in Bessel optical lattices (2004)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
Stable ring vortex solitons, featuring a bright-shape, appear to be very rare in nature. However, here we show that they exist and can be made dynamically stable in defocusing cubic nonlinear media...
Soliton spiraling in optically-induced rotating Bessel lattices (2004)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address soliton spiraling in optical lattices induced by multiple coherent Bessel beams and show that the dynamical nature of such lattices make them able to drag different soliton structures,...
Spatiotemporal discrete multicolor solitons (2004)
Xu, Zhiyong, Kartashov, Yaroslav V., Crasovan, Lucian-Cornel, Mihalache, Dumitru, Torner, Lluis
We have found various families of two-dimensional spatiotemporal solitons in quadratically nonlinear waveguide arrays. The families of unstaggered odd, even and twisted stationary solutions are...
Stable soliton complexes and azimuthal switching in modulated Bessel optical lattices (2004)
Kartashov, Yaroslav V., Egorov, Alexey A., Vysloukh, Victor A., Torner, Lluis
We address azimuthally modulated Bessel optical lattices imprinted in focusing cubic Kerr-type nonlinear media, and reveal that such lattices support different types of stable solitons, whose...
Stabilization of vector solitons in optical lattices (2004)
Kartashov, Yaroslav V., Zelenina, Anna S., Vysloukh, Victor A., Torner, Lluis
We address the properties and dynamical stability of one-dimensional vector lattice solitons in Kerr-type cubic medium with harmonic transverse modulation of refractive index. We discovered that...
Rotary dipole-mode solitons in Bessel photonic lattices (2004)
Kartashov, Yaroslav V., Egorov, Alexey A., Vysloukh, Victor A., Torner, Lluis
We address Bessel photonic lattices of radial symmetry imprinted in cubic Kerr-type nonlinear media and show that they support families of stable dipole-mode solitons featuring two out-of-phase light...
Soliton eigenvalue control with optical lattices (2004)
Kartashov, Yaroslav V., Crasovan, Lucian-Cornel, Zelenina, Anna S., Vysloukh, Victor A., Sanpera, Anna, Lewenstein, Maciej, ...
We address the dynamics of higher-order solitons in optical lattices, and predict their self-splitting into the set of their single-soliton constituents. The splitting is induced by the potential...
Rotary solitons in Bessel photonic lattices (2004)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We introduce solitons supported by Bessel photonic lattices in cubic nonlinear media. We show that the cylindrical geometry of the lattice, with several concentric rings, affords unique soliton...
Soliton trains in photonic lattices (2004)
Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We address the formation and propagation of multi-spot soliton packets in saturable Kerr nonlinear media with an imprinted harmonic transverse modulation of the refractive index. We show that, in...
Silvia Carrasco, Juan P. Torres, Lluis Torner, Er Sergienko, Malvin C. Teich
We show theoretically that a chirped quasi-phase-matching nonlinear crystal structure can significantly enhance the axial resolution in quantum optical coherence tomography by increasing the spectral...
Soliton "molecules": robust clusters of light bullets (2003)
Crasovan, Lucian-Cornel, Kartashov, Yaroslav V., Mihalache, Dumitru, Torner, Lluis, Kivshar, Yuri S., Perez-Garcia, Victor M.
We show how to generate robust self-sustained clusters of soliton bullets-spatiotemporal (optical or matter-wave) solitons. The clusters carry an orbital angular momentum being supported by competing...
Globally-Linked Vortex Clusters in Trapped Wave Fields (2002)
Crasovan, Lucian-Cornel, Molina-Terriza, Gabriel, Torres, Juan P., Torner, Lluis, Perez-Garcia, Victor M., Mihalache, Dumitru
We put forward the existence of a rich variety of fully stationary vortex structures, termed H-clusters, made of an increasing number of vortices nested in paraxial wave fields confined by trapping...
Molina-Terriza, Gabriel, Torres, Juan P., Torner, Lluis
We put forward schemes to prepare photons in multi-dimensional vector states of orbital angular momentum. We show realizable light distributions that yield prescribed states with finite or infinite...
Engineering of spatial solitons in two-period QPM structures (2001)
Johansen, Steffen Kjaer, Carrasco, Silvia, Torner, Lluis, Bang, Ole
We report on a scheme which might make it practically possible to engineer the effective competing nonlinearities that on average govern the light propagation in quasi-phase-matching (QPM) gratings....
Structural instability of vortices in Bose-Einstein condensates (2001)
Garcia-Ripoll, Juan J., Molina-Terriza, Gabriel, Perez-Garcia, Victor M., Torner, Lluis
In this paper we study a gaseous Bose-Einstein condensate (BEC) and show that: (i) A minimum value of the interaction is needed for the existence of stable persistent currents. (ii) Vorticity is not...
Observation of the Dynamical Inversion of the Topological Charge of an Optical Vortex (2001)
Molina-Terriza, Gabriel, Recolons, Jaume, Torner, Lluis, Torres, Juan P., Wright, Ewan M.
Structural Instability of Vortices in Bose-Einstein Condensates (2001)
García-Ripoll, Juan J., Molina-Terriza, Gabriel, Torner, Lluis
Robustness of Quadratic Solitons with Periodic Gain (2000)
Torner, Lluis, Torres, Juan P., Bang, Ole
We address the robustness of quadratic solitons with periodic non-conservative perturbations. We find the evolution equations for guiding-center solitons under conditions for second-harmonic...
Spatial Switching of Quadratic Solitons in Engineered Quasi-Phase-Matched Structures (1999)
Carl Balslev Clausen, Lluis Torner
> Engineered QPM patterns also hold great promise for use in soliton systems. In particular, soliton-based signal compression and shaping in quasiphase -matched structures with longitudinal chirps...