Abstract
We resolve a controversial issue of the stability of composite vortex solitons in self-focusing saturable nonlinear media. Stable vortex solitons with hidden angular momentum, i.e., composed of counter-rotating beams with topological charges +1 and -1, are found, and their linear-stability region is identified. In contrast, the solitons with explicit vorticity are always unstable against splitting. The predicted linear stability of the hidden-vorticity solitons is achieved in the strong-saturation regime, when the soliton's total power exceeds a certain threshold. The dynamical stability is verified in direct simulations of nonlinear model.
Original language | English |
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Pages (from-to) | 231-234 |
Number of pages | 4 |
Journal | Physics Letters, Section A: General, Atomic and Solid State Physics |
Volume | 364 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - Apr 30 2007 |
Externally published | Yes |
Keywords
- Optical angular momentum
- Optical vortex
- Phase dislocation
- Spatial soliton
ASJC Scopus subject areas
- Physics and Astronomy(all)