Now showing items 1-20 of 47

  • Arresting wave collapse by wave self-rectification 

    Crasovan, L C; Pérez Torres, Juan; Mihalache, Dumitru; Torner Sabata, Lluís (2003-08)
    Article
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    We put forward a mechanism for tailoring, and even arresting, the collapse of wave packets in nonlinear media, whose dynamics is governed by nonlocal two-dimensional nonlinear Schrödinger-like equations. The key ingredient ...
  • Asymmetric spatio-temporal optical solitons in media with quadratic nonlinearity 

    Mihalache, Dumitru; Mazilu, D; Malomed, B A; Torner Sabata, Lluís (1998-07)
    Article
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    We find exact one-parameter families of stationary two-dimensional light bullets in the form of solitons localized in space and time in diffractive and dispersive nonlinear media under conditions for second-harmonic ...
  • Elliptical light bullets 

    Mihalache, Dumitru; Mazilu, D; Dorring, J; Torner Sabata, Lluís (1999-01)
    Article
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    We address the existence and properties of three-dimensional solitons localized in space and time, or light bullets, in bulk dispersive quadratic nonlinear media under conditions for Type I second-harmonic generation, with ...
  • Enhanced localization of Dyakonov-like surface waves in left-handed materials 

    Crasovan, L C; Takayama, Osamu; Artigas García, David; Johansen, S K; Mihalache, Dumitru; Torner Sabata, Lluís (2006-10)
    Article
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    We address the existence and properties of hybrid surface waves forming at interfaces between left-handed materials and dielectric birefringent media. The existence conditions of such waves are found to be highly relaxed ...
  • Gaussian-beam excitation of 3d nonlinear waves 

    Mihalache, Dumitru; Baboiu, Daniel; Mazilu, Dumitru; Torner Sabata, Lluís; Pérez Torres, Juan (1994-07)
    Article
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    The propagation of stationary three-dimensional nonlinear guided waves and of Gaussian beams in a slab waveguide in which the cladding displays both Kerr-law and saturable instantaneous self-focusing nonlinearities is ...
  • Generation of surface soliton arrays 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Mihalache, Dumitru; Torner Sabata, Lluís (2006-07)
    Article
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    We discover that, at the edge of an optical lattice imprinted in a saturable nonlinear medium, one-dimensional surface solitons exist only within a band of light intensities and that they cease to exist when the lattice ...
  • Globally-linked vortex clusters 

    Crasovan, L C; Vekslerchik, V; Mihalache, Dumitru; Pérez Torres, Juan; Perez-Garcia, V M; Torner Sabata, Lluís (Kluwer, 2004-09-30)
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    We show the existence of a rich variety of fully stationary vortex structures made of an increasing number of vortices nested in paraxial wave fields confined by symmetric and asymmetric harmonic trapping potentials in ...
  • Hybrid waves guided by ultrathin films 

    Torner Sabata, Lluís; Pérez Torres, Juan; Ojeda, C.; Mihalache, Dumitru (1995-09)
    Article
    Open Access
    Abstract: The existence conditions and waveguiding properties of new hybrid, TE-dominant waveguide modes of properly tailored waveguides consisting on ultrathin films cladded by a positive birefringent crystal are analyzed. ...
  • Inverse-scattering approach to femtosecond solitons in monomode optical fibers 

    Mihalache, Dumitru; Torner Sabata, Lluís; Moldoveanu, F.; Panoiu, N.-C.; Truta, N. (1993-12)
    Article
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    Using the inverse-scattering transform with 3×3 U-V matrix representation and fully exploiting the symmetry properties of the scattering matrix elements, we found the one-parameter single-soliton, the four-parameter breather ...
  • Method for generating solitons sustained by competing nonlinearities by use of optical rectification 

    Pérez Torres, Juan; Palacios, S L; Torner Sabata, Lluís; Crasovan, L C; Mihalache, Dumitru; Biaggio, I (2002-09)
    Article
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    We put forward a method for generating engineerable competing quadratic and cubic nonlinearities in suitable settings in which frequency generation is accompanied by optical rectification. The novel scheme is based on the ...
  • Multicolor vortex solitons in two-dimensional photonic lattices 

    Xu, Zhiyong; Kartashov, Yaroslav V.; Crasovan, L C; Mihalache, Dumitru; Torner Sabata, Lluís (2005-01)
    Article
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    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. It is shown that the ...
  • Multipole vector solitons in nonlocal nonlinear media 

    Kartashov, Yaroslav V.; Torner Sabata, Lluís; Vysloukh, Victor A.; Mihalache, Dumitru (2006-03)
    Article
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    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 jointly inducing a ...
  • New type of guided waves in birefringent media 

    Torner Sabata, Lluís; Pérez Torres, Juan; Mihalache, Dumitru (1993-02)
    Article
    Open Access
    The existence of waves guided by thin dielectric films deposited over a positive birefringent crystal for waveguide parameters below usual cutoff is discussed. This additional kind of guided wave has a hybrid nature and ...
  • Nonlinear hybrid guided waves in birefringent media 

    Pérez Torres, Juan; Torner Sabata, Lluís; Lederer, F.; Mihalache, Dumitru; Baboiu, Daniel; Ciumac, Mariana (1994-06)
    Article
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    The waveguiding properties of nonlinear hybrid waves guided by integrated-optics structures containing both birefringent crystals and isotropic nonlinear media have been investigated. The existence of both TE- and TM-dominant ...
  • On multidimensional solitons and their legacy in contemporary Atomic, Molecular and Optical physics 

    Malomed, Boris; Torner Sabata, Lluís; Wise, Frank; Mihalache, Dumitru (IOP, 2016-08-22)
    Article
    Open Access
    This viewpoint relates to an article by B A Malomed, D Mihalache, F Wise, and L Torner (2005 J. Opt. B: Quantum Semiclass. Opt. 7 R53–R72) and was published as part of a series of viewpoints celebrating 50 of the most ...
  • On the stability of TE0 waves guided by thin films bounded by a nonlinear medium 

    Torner Sabata, Lluís; Pérez Torres, Juan; Mihalache, Dumitru; Baboiu, Daniel; Mazilu, Dumitru (1993-02)
    Article
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    The authors show that investigations on the stability of nonlinear waves guided by planar structures greatly benefit when the conditions of marginal stability are considered on a suitable restricted parameter space. Relevant ...
  • Optical Dyakonov surface waves at magnetic interfaces 

    Crasovan, L C; Artigas García, David; Mihalache, Dumitru; Torner Sabata, Lluís (2005-11)
    Article
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    We address the existence and properties of lossless surface waves that form at interfaces between magnetic and birefringent media. We show that the angular domain of existence of Dyakonov surface waves for magnetic interfaces ...
  • Robust propagation of two-color soliton clusters supported by competing nonlinearities 

    Kartashov, Yaroslav V.; Crasovan, L C; Mihalache, Dumitru; Torner Sabata, Lluís (2002-12)
    Article
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    We reveal numerically the remarkably robust propagation of quasistationary two-color soliton clusters in media with competing quadratic and cubic nonlinearities. We predict that such clusters carrying nonzero angular ...
  • Robust soliton clusters in media with competing cubic and quintic nonlinearities 

    Mihalache, Dumitru; Mazilu, D; Crasovan, L.C.; Malomed, Boris A.; Lederer, F; Torner Sabata, Lluís (2003-10)
    Article
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    Systematic results are reported for dynamics of circular patterns (“necklaces”), composed of fundamental solitons and carrying orbital angular momentum, in the two-dimensional model, which describes the propagation of light ...
  • Soliton clusters in 3D media with competing cubic and quintic nonlinearities 

    Mihalache, Dumitru; Mazilu, D; Crasovan, L C; Malomed, B A; Lederer, F; Torner Sabata, Lluís (2004-04)
    Article
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    We introduce a class of robust soliton clusters composed of N fundamental solitons in three-dimensional media combining the self-focusing cubic and self-defocusing quintic nonlinearities. The angular momentum is lent to ...