Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7924924 | Optics Communications | 2018 | 7 Pages |
Abstract
We report the existence and stability of 1-charge discrete vortex solitons in linear scaled-space square lattices with photorefractive self-focusing nonlinearity. By scaling the square lattice along the edge and diagonal, we obtained rectangular and diamond lattices. In both settings, it is shown that the vortices can be stable in a moderate power region, and the vortices with high power are unstable, suffering from oscillatory instabilities. The structure of the rectangular potential strongly affects the profile of the vortex solitons, leading to distinct intensity asymmetry, phase dislocation, and exponential instability in the low power region. Correspondingly, the vortex profile could be well maintained in diamond lattices. Fascinating, even the low power unstable vortices suffered from both oscillatory and exponential instability in diamond lattices, they have a much weaker instability than counterparts in rectangular lattices.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Shengyi Mao, Yali Qin, Yilei Li, Hongliang Ren, Linlin Xue,