Twin-vortex solitons in nonlocal nonlinear media

Abstract

We consider soliton formation in thermal nonlinear media bounded by rectangular cross-sections and uncover a new class of nonlinear stationary topological state. Specifically, we find that stationary higher-order vortex states in standard shapes do not exist, but rather they take the form of multiple, spatially separated single-charge singularities nested in an elliptical beam. Double-charge states are found to be remarkably robust despite their shape asymmetry and the phase-singularity splitting. States with higher topological charges are found to be unstable.

12 pages, 4 figures, to appear in Optics Letters

References in corpus (4)

• Stability of two-dimensional spatial solitons in nonlocal nonlinear media
• Nonlocal stabilization of nonlinear beams in a self-focusing atomic vapor
• Stability of vortex solitons in thermal nonlinear media with cylindrical symmetry
• Stabilization of dipole solitons in nonlocal nonlinear media

Cited by in corpus (5)

• Rotating vortex solitons supported by localized gain
• Solitary vortices supported by localized parametric gain
• Vortex soliton tori with multiple nested phase singularities in dissipative media
• Vortex twins and anti-twins supported by multi-ring gain landscapes
• Nonlinearity-mediated soliton ejection from trapping potentials in nonlocal media