نتایج جستجو برای: photon solitons

تعداد نتایج: 79809  

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2002
D Mihalache D Mazilu L-C Crasovan I Towers B A Malomed A V Buryak L Torner F Lederer

We show that the quadratic interaction of fundamental and second harmonics in a bulk dispersive medium, combined with self-defocusing cubic nonlinearity, gives rise to completely localized spatiotemporal solitons (vortex tori) with vorticity s=1. There is no threshold necessary for the existence of these solitons. They are found to be stable if their energy exceeds a certain critical value, so ...

Journal: :Optics express 2014
Yong Xu Peng Zhang Sunghwan Jung Aram Lee

We analyze two nonlinear optofluidic processes where nonlinearity is induced by the interplay between optical field and liquid interface. Specifically, guided optical waves generate radiation pressure on the liquid interface, which can in turn distort the liquid interface and modify the properties of the optical field. In the first example, we discuss the feasibility of nonlinear optofluidic so...

1997
Boris A. Malomed

We consider solutions to the second-harmonic generation equations in twoand three-dimensional dispersive media in the form of solitons localized in space and time. As is known, collapse does not take place in these models, which is why the solitons may be stable. The general solution is obtained in an approximate analytical form by means of a variational approach, which also allows the stabilit...

Journal: :Physical review letters 2003
Claudio Conti Marco Peccianti Gaetano Assanto

We develop a general theory of spatial solitons in a liquid crystalline medium exhibiting a nonlinearity with an arbitrary degree of effective nonlocality. The model accounts the observability of accessible solitons and establishes an important link with parametric solitons.

Journal: :Letters in Mathematical Physics 2022

In this paper we extend existing results for generalized solitons, called $q$-solitons, to the complete case by considering non-compact solitons. By placing regularity conditions on vector field $X$ and curvature $M$, are able use chosen properties of tensor $q$ see that such $q$-solitons stationary $q$-flat. We conclude applying our examples ambient obstruction Cotton Bach solitons demonstrate...

2009
Yana Izdebskaya Vladlen Shvedov Anton S. Desyatnikov Wieslaw Krolikowski Gaetano Assanto Yuri S. Kivshar

We study experimentally the propagation dynamics and interaction of spatial optical solitons in a bias-free cell filled with nematic liquid crystals. We reveal and measure long-range effects due to the cell boundaries for a single nematicon as well as for the interacting in-phase and out-of-phase nematicons. We discuss the effect of initial beam focusing and relative input angle on the interact...

Journal: :Optics letters 2016
Zimu Zhu Logan G Wright Demetrios N Christodoulides Frank W Wise

We experimentally isolate and directly observe multimode solitons in few-mode graded-index fiber. We rely on Raman frequency shifts to spectrally isolate these multimode solitons. By varying the input energy and modal composition of the launched pulse, we observe a continuous variation of multimode solitons with different spatiotemporal properties. They exhibit an energy-volume relation that is...

Journal: :Optics letters 2001
A S Desyatnikov D Neshev E A Ostrovskaya Y S Kivshar W Krolikowski B Luther-Davies J J García-Ripoll V M Pérez-García

We introduce the concept of multipole spatial optical vector solitons associated with higher-order guided modes trapped by a soliton-induced waveguide in a bulk medium. Such stationary localized waves include previously predicted vortex- and dipole-mode vector solitons and also describe new higher-order vector solitons and necklace-type beams. We present the theoretical and experimental results...

2006
Thorsten Ackemann William J Firth

Many dissipative optical systems support patterns. Dissipative solitons are generally found where a pattern coexists with a stable unpatterned state. We consider such phenomena in driven optical cavities containing a nonlinear medium (cavity solitons) and rather similar phenomena (feedback solitons) where a driven nonlinear optical medium is in front of a single feedback mirror. The history, th...

Journal: :Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics 2000
Krolikowski Luther-Davies McCarthy Bledowski

We study formation and interaction of one-dimensional screening solitons in a photorefractive medium with sublinear dependence of the photoconductivity on light intensity. We find an exact analytical solution to the corresponding nonlinear Schrodinger equation. We show that these solitons are stable in propagation and their interaction is generic for solitons of saturable nonlinearity. In parti...

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