L. Torner - Academia.edu (original) (raw)

Papers by L. Torner

Research paper thumbnail of Anderson cross-localization in photonic lattices

Conference on Lasers and Electro-Optics 2012, 2012

ABSTRACT

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Research paper thumbnail of Method to generate solitons supported by competing nonlinearities and OR

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Research paper thumbnail of Two-dimensional cnoidal waves in saturable nonlinear medium

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Research paper thumbnail of Stable solitons of even and odd parities supported by competing nonlocal nonlinearities

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Research paper thumbnail of Stability of vortex solitons in thermal nonlinear media with cylindrical symmetry

We analyze the salient features of vortex-ring solitons supported by cylindrically symmetric medi... more 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 charge for such vortex solitons to be stable on propagation: Only vortex-ring solitons with topological charge m </= 2 are found to be stable. This remarkable result holds independently of the radius of the sample.

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Research paper thumbnail of Guiding-center solitons in rotating potentials

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Research paper thumbnail of Nonlinear surface modes in annular waveguides

We introduce a novel type of surface waves that can be excited at the edge of annular guiding str... more We introduce a novel type of surface waves that can be excited at the edge of annular guiding structures created by several concentric rings. We demonstrate that such surface waves can rotate upon propagation and for high enough rotation frequencies they do not require any power thresholds for their existence.

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Research paper thumbnail of Light dynamics in materials with radially inhomogeneous thermal conductivity

We study the properties of bright and vortex solitons in thermal media with nonuniform thermal co... more We study the properties of bright and vortex solitons in thermal media with nonuniform thermal conductivity and homogeneous refractive index, whereby the local modulation of the thermal conductivity strongly affects the entire refractive index distribution. While regions where the thermal conductivity is increased effectively expel light, self-trapping may occur in the regions with reduced thermal conductivity, even if such regions are located close to the material boundary. As a result, strongly asymmetric self-trapped beams may form inside a ring with reduced thermal conductivity and perform persistent rotary motion. Also, such rings are shown to support stable vortex solitons, which may feature strongly noncanonical shapes.

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Research paper thumbnail of Vortex lattice solitons supported by localized gain

Optics Letters, 2010

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Research paper thumbnail of Enhanced localization of Dyakonov-like surface waves in left-handed materials

Physical Review B, 2006

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Research paper thumbnail of Three-dimensional walking spatiotemporal solitons in quadratic media

Physical Review E, 2000

Two-parameter families of chirped stationary three-dimensional spatiotemporal solitons in dispers... more Two-parameter families of chirped stationary three-dimensional spatiotemporal solitons in dispersive quadratically nonlinear optical media featuring type-I second-harmonic generation are constructed in the presence of temporal walk-off. Basic features of these walking spatiotemporal solitons, including their dynamical stability, are investigated in the general case of unequal group-velocity dispersions at the fundamental and second-harmonic frequencies. In the cases when the solitons are unstable, the growth rate of a dominant perturbation eigenmode is found as a function of the soliton wave number shift. The findings are in full agreement with the stability predictions made on the basis of a marginal linear-stability curve. It is found that the walking three-dimensional spatiotemporal solitons are dynamically stable in most cases; hence in principle they may be experimentally generated in quadratically nonlinear media.

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Research paper thumbnail of Tunable self-action of light in optical rectification

Optics Communications, 2002

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Research paper thumbnail of Quantum Dots: Multidimensional Quantum States of the Angular

Optics and Photonics News, 2002

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Research paper thumbnail of Generating Ultra-Broadband Biphotons via Chirped QPM Down-conversion

Optics and Photonics News, 2008

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Research paper thumbnail of Globally linked vortex clusters in trapped wave fields

Physical Review E, 2002

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Research paper thumbnail of Optical vortices in nonlinear quadratic crystals: Classical and quantum features

Frontiers in Optics, 2003

©2000 Optical Society of America OCIS codes: (190.4410.190.4420) General Since screw dislocations... more ©2000 Optical Society of America OCIS codes: (190.4410.190.4420) General Since screw dislocations were first discussed in general wave fronts [1], the study of these structures has grown to become a field of its own: singular optics [2]. Optical screw dislocations, also called optical ...

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Research paper thumbnail of Dispersion-managed cnoidal pulse trains

Physical Review E, 2003

We report on the existence and properties of breathing periodic cnoidal pulse trains propagating ... more We report on the existence and properties of breathing periodic cnoidal pulse trains propagating in dispersion managed systems with piecewise constant dispersion. Our numerical investigations show that the dispersion management enhances the robustness of the periodic cnoidal pulse trains in comparison to the pulse trains existing in a uniform medium. The concept might have direct applications to pulse trains generated by mode-locked fiber lasers.

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Research paper thumbnail of Trans black sea region symposium on applied electromagnetism magnetic detection and localization of defects in ferromagnetic pipes

Trans Black Sea Region Symposium on Applied Electromagnetism, 1996

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Research paper thumbnail of Walking Solitons

Optics and Photonics News, 1997

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Research paper thumbnail of Probing canonical geometrical objects by digital spiral imaging

Journal of the European Optical Society: Rapid Publications, 2007

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Research paper thumbnail of Anderson cross-localization in photonic lattices

Conference on Lasers and Electro-Optics 2012, 2012

ABSTRACT

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Research paper thumbnail of Method to generate solitons supported by competing nonlinearities and OR

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Two-dimensional cnoidal waves in saturable nonlinear medium

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Stable solitons of even and odd parities supported by competing nonlocal nonlinearities

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Stability of vortex solitons in thermal nonlinear media with cylindrical symmetry

We analyze the salient features of vortex-ring solitons supported by cylindrically symmetric medi... more 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 charge for such vortex solitons to be stable on propagation: Only vortex-ring solitons with topological charge m </= 2 are found to be stable. This remarkable result holds independently of the radius of the sample.

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Research paper thumbnail of Guiding-center solitons in rotating potentials

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Research paper thumbnail of Nonlinear surface modes in annular waveguides

We introduce a novel type of surface waves that can be excited at the edge of annular guiding str... more We introduce a novel type of surface waves that can be excited at the edge of annular guiding structures created by several concentric rings. We demonstrate that such surface waves can rotate upon propagation and for high enough rotation frequencies they do not require any power thresholds for their existence.

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Research paper thumbnail of Light dynamics in materials with radially inhomogeneous thermal conductivity

We study the properties of bright and vortex solitons in thermal media with nonuniform thermal co... more We study the properties of bright and vortex solitons in thermal media with nonuniform thermal conductivity and homogeneous refractive index, whereby the local modulation of the thermal conductivity strongly affects the entire refractive index distribution. While regions where the thermal conductivity is increased effectively expel light, self-trapping may occur in the regions with reduced thermal conductivity, even if such regions are located close to the material boundary. As a result, strongly asymmetric self-trapped beams may form inside a ring with reduced thermal conductivity and perform persistent rotary motion. Also, such rings are shown to support stable vortex solitons, which may feature strongly noncanonical shapes.

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Research paper thumbnail of Vortex lattice solitons supported by localized gain

Optics Letters, 2010

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Research paper thumbnail of Enhanced localization of Dyakonov-like surface waves in left-handed materials

Physical Review B, 2006

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Research paper thumbnail of Three-dimensional walking spatiotemporal solitons in quadratic media

Physical Review E, 2000

Two-parameter families of chirped stationary three-dimensional spatiotemporal solitons in dispers... more Two-parameter families of chirped stationary three-dimensional spatiotemporal solitons in dispersive quadratically nonlinear optical media featuring type-I second-harmonic generation are constructed in the presence of temporal walk-off. Basic features of these walking spatiotemporal solitons, including their dynamical stability, are investigated in the general case of unequal group-velocity dispersions at the fundamental and second-harmonic frequencies. In the cases when the solitons are unstable, the growth rate of a dominant perturbation eigenmode is found as a function of the soliton wave number shift. The findings are in full agreement with the stability predictions made on the basis of a marginal linear-stability curve. It is found that the walking three-dimensional spatiotemporal solitons are dynamically stable in most cases; hence in principle they may be experimentally generated in quadratically nonlinear media.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Tunable self-action of light in optical rectification

Optics Communications, 2002

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Research paper thumbnail of Quantum Dots: Multidimensional Quantum States of the Angular

Optics and Photonics News, 2002

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Research paper thumbnail of Generating Ultra-Broadband Biphotons via Chirped QPM Down-conversion

Optics and Photonics News, 2008

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Research paper thumbnail of Globally linked vortex clusters in trapped wave fields

Physical Review E, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Optical vortices in nonlinear quadratic crystals: Classical and quantum features

Frontiers in Optics, 2003

©2000 Optical Society of America OCIS codes: (190.4410.190.4420) General Since screw dislocations... more ©2000 Optical Society of America OCIS codes: (190.4410.190.4420) General Since screw dislocations were first discussed in general wave fronts [1], the study of these structures has grown to become a field of its own: singular optics [2]. Optical screw dislocations, also called optical ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Dispersion-managed cnoidal pulse trains

Physical Review E, 2003

We report on the existence and properties of breathing periodic cnoidal pulse trains propagating ... more We report on the existence and properties of breathing periodic cnoidal pulse trains propagating in dispersion managed systems with piecewise constant dispersion. Our numerical investigations show that the dispersion management enhances the robustness of the periodic cnoidal pulse trains in comparison to the pulse trains existing in a uniform medium. The concept might have direct applications to pulse trains generated by mode-locked fiber lasers.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Trans black sea region symposium on applied electromagnetism magnetic detection and localization of defects in ferromagnetic pipes

Trans Black Sea Region Symposium on Applied Electromagnetism, 1996

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Walking Solitons

Optics and Photonics News, 1997

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Probing canonical geometrical objects by digital spiral imaging

Journal of the European Optical Society: Rapid Publications, 2007

Bookmarks Related papers MentionsView impact