Interactions between two-dimensional composite vector solitons carrying topological charges

作     者：Ziad H. Musslimani Marin Soljačić Mordechai Segev Demetrios N. Christodoulides 

作者机构：Department of Applied Mathematics University of Colorado Campus Box 526 Boulder Colorado 80309-0526 Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 Physics Department and Solid State Institute Technion—Israel Institute of Technology 32 000 Haifa IsraelDepartment of Electrical Engineering Princeton University Princeton New Jersey 08544 Department of Electrical Engineering and Computer Science Lehigh University Bethlehem Pennslyvania 18015 

出 版 物：《Physical Review E》 (物理学评论E辑：统计、非线性和软体物理学)

年 卷 期：2001年第63卷第6期

页      面：066608-066608页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

主　　题：.colliding topological charges bound state nonlinear media saturable composite vector collision angle Soljacˇic Interactions between two-dimensional delayed-action composite solitons carrying 

摘      要：We present a comprehensive study of interactions (collisions) between two-dimensional composite vector solitons carrying topological charges in isotropic saturable nonlinear media. We numerically study interactions between such composite solitons for different regimes of collision angle and report numerous effects which are caused solely by the “spin (topological charge) carried by the second excited mode. The most intriguing phenomenon we find is the delayed-action interaction between interacting composite solitons carrying opposite spins. In this case, two colliding solitons undergo a fusion process and form a metastable bound state that decays after long propagation distances into two or three new solitons. Another noticeable effect is spin-orbit coupling in which angular momentum is being transferred from “spin to orbital angular momentum. This phenomenon occurs at angles below the critical angle, including the case when the initial soliton trajectories are in parallel to one another and lie in the same plane. Finally, we report on shape transformation of vortex component into a rotating dipole-mode solitons that occurs at large collision angles, i.e., at angles for which scalar solitons of all types simply go through one another unaffected.