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Yuri S. Kivshar - One of the best experts on this subject based on the ideXlab platform.
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laguerre and hermite Soliton clusters in nonlocal nonlinear media
Physical Review Letters, 2007Co-Authors: Daniel Buccoliero, Wieslaw Krolikowski, Anton S Desyatnikov, Yuri S. KivsharAbstract:: We introduce novel classes of higher-order spatial optical Solitons in analogy with Laguerre-Gaussian and Hermite-Gaussian linear eigenmodes. We reveal that stable higher-order optical Solitons can exist in nonlocal nonlinear media in the various forms of Soliton necklaces and Soliton matrices. Modulational instability can lead to nontrivial transformations between energetically close Solitons with different symmetries through the intermediate states resembling generalized Hermite-Laguerre-Gaussian modes.
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All-optical switching of spatial gap Solitons
OSA Trends in Optics and Photonics Series, 2004Co-Authors: Andrey A. Sukhorukov, Yuri S. KivsharAbstract:We propose a new approach to the Soliton switching in periodic structures based on Bloch-wave filtering. We also demonstrate that mobility of gap Solitons can be selectively enhanced or suppressed, allowing for precise control of the Soliton dynamics. © 2003 Optical Society of America.
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Soliton "molecules": robust clusters of spatiotemporal optical Solitons.
Physical review. E Statistical nonlinear and soft matter physics, 2003Co-Authors: Lucian-cornel Crasovan, Yuri S. Kivshar, Yaroslav V. Kartashov, Lluis Torner, Dumitru Mihalache, Víctor M Pérez-garcíaAbstract: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 nonlinearities. The "atoms" forming the "molecule" are fully three-dimensional Solitons linked via a staircaselike macroscopic phase. Recent progress in generating atomic-molecular coherent mixing in the Bose-Einstein condensates might open potential scenarios for the experimental generation of these Soliton molecules with matter waves.
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Soliton-based optical switching in waveguide arrays
Journal of the Optical Society of America B, 1996Co-Authors: Wieslaw Krolikowski, Yuri S. KivsharAbstract:We analyze the propagation of discrete Solitons in a periodic system\nof weakly coupled nonlinear optical waveguides, i.e., a waveguide\narray. Soliton reflection, transmission, and trapping, as well as\ncoherent and incoherent interaction with a linear guided wave [which\ncan exist owing to defect (inhomogeneous) coupling between two neighboring\nwaveguides], are demonstrated numerically and investigated analytically\nwith a collective-coordinate approach. Some potential schemes of\ncontrollable and steerable Soliton-based optical switching in nonlinear\nwaveguide arrays are discussed. For the first scheme it is suggested\nthat unstable Soliton modes be used to achieve easily steerable propagation\nof discrete bright and dark Solitons. This is to avoid mode trapping\nby the effective Peierls-Nabarro potential, which always appears\nbecause of the system discreteness. The other scheme is based on\nSoliton control with the help of a linear guided wave that can be\nexcited in an inhomogeneous array. (C) 1996 Optical Society of America
Wojtek J. Zakrzewski - One of the best experts on this subject based on the ideXlab platform.
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Solitons in ?-helical proteins
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2004Co-Authors: L.S. Brizhik, A.A. Eremko, B. M.. A. G. Piette, Wojtek J. ZakrzewskiAbstract:We investigate some aspects of the Soliton dynamics in an ?-helical protein macromolecule within the steric Davydov-Scott model. Our main objective is to elucidate the important role of the helical symmetry in the formation, stability, and dynamical properties of Davydov’s Solitons in an ? helix. We show, analytically and numerically, that the corresponding system of nonlinear equations admits several types of stationary Soliton solutions and that Solitons which preserve helical symmetry are dynamically unstable: once formed, they decay rapidly when they propagate. On the other hand, the Soliton which spontaneously breaks the local translational and helical symmetries possesses the lowest energy and is a robust localized entity. We also demonstrate that this Soliton is the result of a hybridization of the quasiparticle states from the two lowest degenerate bands and has an inner structure which can be described as a modulated multihump amplitude distribution of excitations on individual spines. The complex and composite structure of the Soliton manifests itself distinctly when the Soliton is moving and some interspine oscillations take place. Such a Soliton structure and the interspine oscillations have previously been observed numerically [ A. C. Scott Phys. Rev. A 26 578 (1982)]. Here we argue that the Solitons studied by Scott are hybrid Solitons and that the oscillations arise due to the helical symmetry of the system and result from the motion of the Soliton along the ? helix. The frequency of the interspine oscillations is shown to be proportional to the Soliton velocity.
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Solitons in alpha-helical proteins
Physical Review E, 2004Co-Authors: L.S. Brizhik, A.A. Eremko, B. M.. A. G. Piette, Wojtek J. ZakrzewskiAbstract:We investigate some aspects of the Soliton dynamics in an alpha-helical\nprotein macromolecule within the steric Davydov-Scott model. Our\nmain objective is to elucidate the important role of the helical\nsymmetry in the formation, stability, and dynamical properties of\nDavydov's Solitons in an alpha helix. We show, analytically and numerically,\nthat the corresponding system of nonlinear equations admits several\ntypes of stationary Soliton solutions and that Solitons which preserve\nhelical symmetry are dynamically unstable: once formed, they decay\nrapidly when they propagate. On the other hand, the Soliton which\nspontaneously breaks the local translational and helical symmetries\npossesses the lowest energy and is a robust localized entity. We\nalso demonstrate that this Soliton is the result of a hybridization\nof the quasiparticle states from the two lowest degenerate bands\nand has an inner structure which can be described as a modulated\nmultihump amplitude distribution of excitations on individual spines.\nThe complex and composite structure of the Soliton manifests itself\ndistinctly when the Soliton is moving and some interspine oscillations\ntake place. Such a Soliton structure and the interspine oscillations\nhave previously been observed numerically [A. C. Scott, Phys. Rev.\nA 26, 578 (1982)]. Here we argue that the Solitons studied by Scott\nare hybrid Solitons and that the oscillations arise due to the helical\nsymmetry of the system and result from the motion of the Soliton\nalong the alpha helix. The frequency of the interspine oscillations\nis shown to be proportional to the Soliton velocity.
L.S. Brizhik - One of the best experts on this subject based on the ideXlab platform.
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Solitons in ?-helical proteins
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2004Co-Authors: L.S. Brizhik, A.A. Eremko, B. M.. A. G. Piette, Wojtek J. ZakrzewskiAbstract:We investigate some aspects of the Soliton dynamics in an ?-helical protein macromolecule within the steric Davydov-Scott model. Our main objective is to elucidate the important role of the helical symmetry in the formation, stability, and dynamical properties of Davydov’s Solitons in an ? helix. We show, analytically and numerically, that the corresponding system of nonlinear equations admits several types of stationary Soliton solutions and that Solitons which preserve helical symmetry are dynamically unstable: once formed, they decay rapidly when they propagate. On the other hand, the Soliton which spontaneously breaks the local translational and helical symmetries possesses the lowest energy and is a robust localized entity. We also demonstrate that this Soliton is the result of a hybridization of the quasiparticle states from the two lowest degenerate bands and has an inner structure which can be described as a modulated multihump amplitude distribution of excitations on individual spines. The complex and composite structure of the Soliton manifests itself distinctly when the Soliton is moving and some interspine oscillations take place. Such a Soliton structure and the interspine oscillations have previously been observed numerically [ A. C. Scott Phys. Rev. A 26 578 (1982)]. Here we argue that the Solitons studied by Scott are hybrid Solitons and that the oscillations arise due to the helical symmetry of the system and result from the motion of the Soliton along the ? helix. The frequency of the interspine oscillations is shown to be proportional to the Soliton velocity.
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Solitons in alpha-helical proteins
Physical Review E, 2004Co-Authors: L.S. Brizhik, A.A. Eremko, B. M.. A. G. Piette, Wojtek J. ZakrzewskiAbstract:We investigate some aspects of the Soliton dynamics in an alpha-helical\nprotein macromolecule within the steric Davydov-Scott model. Our\nmain objective is to elucidate the important role of the helical\nsymmetry in the formation, stability, and dynamical properties of\nDavydov's Solitons in an alpha helix. We show, analytically and numerically,\nthat the corresponding system of nonlinear equations admits several\ntypes of stationary Soliton solutions and that Solitons which preserve\nhelical symmetry are dynamically unstable: once formed, they decay\nrapidly when they propagate. On the other hand, the Soliton which\nspontaneously breaks the local translational and helical symmetries\npossesses the lowest energy and is a robust localized entity. We\nalso demonstrate that this Soliton is the result of a hybridization\nof the quasiparticle states from the two lowest degenerate bands\nand has an inner structure which can be described as a modulated\nmultihump amplitude distribution of excitations on individual spines.\nThe complex and composite structure of the Soliton manifests itself\ndistinctly when the Soliton is moving and some interspine oscillations\ntake place. Such a Soliton structure and the interspine oscillations\nhave previously been observed numerically [A. C. Scott, Phys. Rev.\nA 26, 578 (1982)]. Here we argue that the Solitons studied by Scott\nare hybrid Solitons and that the oscillations arise due to the helical\nsymmetry of the system and result from the motion of the Soliton\nalong the alpha helix. The frequency of the interspine oscillations\nis shown to be proportional to the Soliton velocity.
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Electromagnetic Radiation Influence on Nonlinear Charge and Energy Transport in Biosystems
Journal of Biological Physics, 1999Co-Authors: L.S. Brizhik, Leonor Cruzeiro-Hansson, A.A. EremkoAbstract:The influence of electromagnetic radiation (EMR) on charge and energy transport processes in biological systems is studied in the light of the Soliton model. It is shown that in the spectrum of biological effects of EMR there are two frequency resonances corresponding to qualitatively different frequency dependent effects of EMR on Solitons. One of them is connected with the quasiresonance dynamic response of Solitons to the EMR. At EMR frequencies close to the dynamic resonance frequency the Solitons absorb energy from the field and generate intensive vibrational modes in the macromolecule. The second EMR resonance is connected with Soliton decay due to the quantum mechanical transition of the system from the bound Soliton state into the excited unbound states.
B Zhao - One of the best experts on this subject based on the ideXlab platform.
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mechanism of multiSoliton formation and Soliton energy quantization in passively mode locked fiber lasers
arXiv: Optics, 2009Co-Authors: Dingyuan Tang, L. M. Zhao, B ZhaoAbstract:We report results of numerical simulations on the multiple Soliton generation and Soliton energy quantization in a Soliton fiber ring laser passively mode-locked by using the nonlinear polarization rotation technique. We found numerically that the formation of multiple Solitons in the laser is caused by a peak power limiting effect of the laser cavity. It is also the same effect that suppresses the Soliton pulse collapse, an intrinsic feature of Solitons propagating in the gain media, and makes the Solitons stable in the laser. Furthermore, we show that the Soliton energy quantization observed in the lasers is a natural consequence of the gain competition between the multiple Solitons. Enlightened by the numerical result we speculate that the multi-Soliton formation and Soliton energy quantization observed in other types of Soliton fiber lasers could have similar mechanism.
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mechanism of multiSoliton formation and Soliton energy quantization in passively mode locked fiber lasers
Physical Review A, 2005Co-Authors: Dingyuan Tang, L. M. Zhao, B ZhaoAbstract:We report results of numerical simulations on multiple-Soliton generation and Soliton energy quantization in a Soliton fiber ring laser passively mode locked by using the nonlinear polarization rotation technique. We found numerically that the formation of multiple Solitons in the laser is caused by a peak-power-limiting effect of the laser cavity. It is also the same effect that suppresses the Soliton pulse collapse, an intrinsic feature of Solitons propagating in gain media, and makes the Solitons stable in the laser. Furthermore, we show that the Soliton energy quantization observed in the lasers is a natural consequence of the gain competition between the multiple Solitons. Enlightened by the numerical result we speculate that multiSoliton formation and Soliton energy quantization observed in other types of Soliton fiber lasers could have a similar mechanism.
L. M. Zhao - One of the best experts on this subject based on the ideXlab platform.
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mechanism of multiSoliton formation and Soliton energy quantization in passively mode locked fiber lasers
arXiv: Optics, 2009Co-Authors: Dingyuan Tang, L. M. Zhao, B ZhaoAbstract:We report results of numerical simulations on the multiple Soliton generation and Soliton energy quantization in a Soliton fiber ring laser passively mode-locked by using the nonlinear polarization rotation technique. We found numerically that the formation of multiple Solitons in the laser is caused by a peak power limiting effect of the laser cavity. It is also the same effect that suppresses the Soliton pulse collapse, an intrinsic feature of Solitons propagating in the gain media, and makes the Solitons stable in the laser. Furthermore, we show that the Soliton energy quantization observed in the lasers is a natural consequence of the gain competition between the multiple Solitons. Enlightened by the numerical result we speculate that the multi-Soliton formation and Soliton energy quantization observed in other types of Soliton fiber lasers could have similar mechanism.
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Bunch of restless vector Solitons in a fiber laser with SESAM
Optics Express, 2009Co-Authors: L. M. Zhao, D Y Tang, X. WuAbstract:We report on the experimental observation of a novel form of vector Soliton interaction in a fiber laser mode-locked with SESAM. Several vector Solitons bunch in the cavity and move as a unit with the cavity repetition rate. However, inside the bunch the vector Solitons make repeatedly contractive and repulsive motions, resembling the contraction and extension of a spring. The number of vector Solitons in the bunch is controllable by changing the pump power. In addition, polarization rotation locking and period doubling bifurcation of the vector Soliton bunch are also experimentally observed.
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mechanism of multiSoliton formation and Soliton energy quantization in passively mode locked fiber lasers
Physical Review A, 2005Co-Authors: Dingyuan Tang, L. M. Zhao, B ZhaoAbstract:We report results of numerical simulations on multiple-Soliton generation and Soliton energy quantization in a Soliton fiber ring laser passively mode locked by using the nonlinear polarization rotation technique. We found numerically that the formation of multiple Solitons in the laser is caused by a peak-power-limiting effect of the laser cavity. It is also the same effect that suppresses the Soliton pulse collapse, an intrinsic feature of Solitons propagating in gain media, and makes the Solitons stable in the laser. Furthermore, we show that the Soliton energy quantization observed in the lasers is a natural consequence of the gain competition between the multiple Solitons. Enlightened by the numerical result we speculate that multiSoliton formation and Soliton energy quantization observed in other types of Soliton fiber lasers could have a similar mechanism.