Generation of rotary beams by interaction of moving solitons in nonlocal media

Abstract

We report that nonlocal nonlinear media allow a controlled interaction among coherent solitons with a relative tilt previously imposed, resulting in the generation of rotary self-trapped beams. We demonstrate that two initially separated fundamental solitons can interact, generating stable rotating dipoles for a continuum interval of relative tilt values. Surprisingly, we find that for a higher number of initial solitons launched and after some emission of radiation waves, the initial self-trapped structures can decay into rotating dipole solitons. The normalized orbital angular momentum of these rotating dipoles can be controlled by adjusting the initial tilt.