Osnabrück 2002 – wissenschaftliches Programm
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Q: Quantenoptik
Q 302: Poster: Nichlineare Optik
Q 302.3: Poster
Mittwoch, 6. März 2002, 11:00–13:00, Schloss
Multi-component spatial vector solitons — •Carsten Weilnau1, Denis Träger1, Cornelia Denz1, Marcus Ahles2, Kristian Motzek2, and Friedemann Kaiser2 — 1Institut für Angewandte Physik, Westfälische Wilhelms-Universität Münster, Corrensstr. 2/4, 48149 Münster — 2Institut für Angewandte Physik, Technische Universität Darmstadt, Hochschulstr. 4/6, 64289 Darmstadt
Stable self-trapped light beams, also denoted as spatial solitons, have attracted considerable research interest within the last decade. When a highly coherent laser beam is incident on a saturable nonlinear material, such as a photorefractive crystal, it induces a local refractive index change that counterbalances the inherent diffraction of the light wave. As a result, light propagates through the nonlinear material without changing its transverse profile. In other words, the light beam propagates as an eigenmode in its own self-induced waveguide structure. When several light beams induce a self-confined localized waveguide, the resulting light intensity is denoted as vector- or multi-component soliton. Hereby, optical beams with an elaborate geometry that resemble the intensity distribution of low-order transverse laser modes serve as different components that are mutually incoherent. We demonstrate the existence of different multi-component light structures consisting of several combinations of node-less and double- or triple-humped beams and show their dynamical propagation behaviour experimentally and numerically. Further on we show, that some distinct configurations do not form a localized and self-confined light structure but break up in a well defined way.
[1] C. Weilnau et al. Phys. Rev. E 64, 056601 (2001)