Graduate School in Nonlinear Science

Sponsored by the Danish Research Academy

MIDIT                               OFD                           CATS
Modelling, Nonlinear Dynamics       Optics and Fluid Dynamics     Chaos and Turbulence Studies
and Irreversible Thermodynamics     Risø National Laboratory      Niels Bohr Institute and 
Technical University of Denmark     Building 128                  Department of Chemistry
Building 321                        P.O. Box 49                   University of Copenhagen 
DK-2800 Lyngby                      DK-4000 Roskilde              DK-2100 Copenhagen Ø
Denmark                             Denmark                       Denmark


by Yuri Kivshar
Optical Sciences Centre
Australian National University
Canberra, Australia

MIDIT-seminar 416

Friday September 25, 1998, 14.00 h
at MIDIT, IMM Building 305, room 027

Abstract: This talk will give a panoramic overview of some properties of spatial optical solitons, self-guided optical beams that can propagate in a bulk without a change of their profile. Both bright and dark solitons will be mentioned, as well as the recent results on the properties of solitary waves supported by parametric wave mixing in an optical medium with quadratic (due to second-harmonic generation) or cubic (due to third-hartmonic generation or four-wave mixing) nonlinear responce. Interaction of solitary waves will be discussed in more details, including the interaction of multi-component soltions and solitonic gluons, the soliton bound states and multi-humped solitons, soliton spiralling in a bulk, etc. Some experimental verifications of the soliton interactions in a photorefractive medium will be also discussed.