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Solitons in spiraling Vogel lattices
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We address light propagation in Vogel optical lattices and show that such lattices support a variety of stable soliton solutions in both self-focusing and self-defocusing media, wh…
Quasi-compactons and bistability in exciton-polariton condensates
Yaroslav V. Kartashov, Vladimir V. Konotop, Lluis Torner
We address stationary patterns in exciton-polariton condensates supported by a narrow external pump beam, and we discover that even in the absence of trapping potentials, such cond…
Asymmetric solitons and domain walls supported by inhomogeneous defocusing nonlinearity
Yaroslav V. Kartashov, Valery E. Lobanov, Boris A. Malomed +1
We show that an inhomogeneous defocusing nonlinearity that grows toward the periphery in the positive and negative transverse directions at different rates can support strongly asy…
Soliton generation by counteracting gain-guiding and self-bending
Valery E. Lobanov, Yaroslav V. Kartashov, Victor A. Vysloukh +1
We introduce a new concept for stable spatial soliton formation, mediated by the competition between self-bending induced by a strongly asymmetric nonlocal nonlinearity and spatial…
Anderson localization in Bragg-guiding arrays with negative defects
Valery E. Lobanov, Yaroslav V. Kartashov, Victor A. Vysloukh +1
We show that Anderson localization is possible in waveguide arrays with periodically-spaced defect waveguides having lower refractive index. Such localization is mediated by Bragg…
Stable bright and vortex solitons in photonic crystal fibers with inhomogeneous defocusing nonlinearity
Valery E. Lobanov, Olga V. Borovkova, Yaroslav V. Kartashov +2
We predict that a photonic crystal fiber whose strands are filled with a defocusing nonlinear medium can support stable bright and also vortex solitons if the strength of the defoc…
Anderson cross-localization
S. Stutzer, Y. V. Kartashov, V. A. Vysloukh +5
We report Anderson localization in two-dimensional optical waveguide arrays with disorder in waveguide separation introduced along one axis of the array, in an uncorrelated fashion…
Observation of the gradual transition from one-dimensional to two-dimensional Anderson localization
U. Naether, Y. V. Kartashov, V. A. Vysloukh +4
We study the gradual transition from one-dimensional to two-dimensional Anderson localization upon transformation of the dimensionality of disordered waveguide arrays. An effective…
Vortex soliton tori with multiple nested phase singularities in dissipative media
Olga V. Borovkova, Valery E. Lobanov, Yaroslav V. Kartashov +1
We show the existence of stable two- and three-dimensional vortex solitons carrying multiple, spatially separated, single-charge topological dislocations nested around a vortex-rin…
Solitons supported by spatially inhomogeneous nonlinear losses
Olga V. Borovkova, Yaroslav V. Kartashov, Victor A. Vysloukh +3
We uncover that, in contrast to the common belief, stable dissipative solitons exist in media with uniform gain in the presence of nonuniform cubic losses, whose local strength gro…
Topological light bullets supported by spatio-temporal gain
Valery E. Lobanov, Olga. V. Borovkova, Yaroslav V. Kartashov +2
We reveal that the competition between diffraction, cubic nonlinearity, two-photon absorption, and gain localized in both space and time results in arrest of collapse, suppression…