Abstract

We address the existence and stability of vortex solitons in a ring-shaped partially-parity-time ($\mathrm{p}\mathcal{PT}$) configuration. In sharp contrast to the reported nonlinear modes in $\mathcal{PT}$- or $\mathrm{p}\mathcal{PT}$-symmetric systems, stable vortex solitons with different topological charges can be supported by the proposed $\mathrm{p}\mathcal{PT}$ potential, despite the system always being beyond the symmetry-breaking point. Vortex solitons are characterized by the number of phase singularities which equals the corresponding topological charge. At higher power, unstable higher-charged vortices degenerate into stable vortices with lower charges. Robust nonlinear vortices can be easily excited by an input Gaussian beam. Our results provide, to the best of our knowledge, the first example of stable solitons in a symmetry-breaking system.

© 2016 Optical Society of America

Stable higher-charge vortex solitons in the cubic–quintic medium with a ring potential

Liangwei Dong, Mingjing Fan, and Boris A. Malomed
Opt. Lett. 48(18) 4817-4820 (2023)

2D in-band solitons in PT-symmetric waveguide arrays

Dengchu Guo, Jing Xiao, Huijun Li, and Liangwei Dong
Opt. Lett. 41(19) 4457-4460 (2016)

Stable radially symmetric and azimuthally modulated vortex solitons supported by localized gain

Valery E. Lobanov, Yaroslav V. Kartashov, Victor A. Vysloukh, and Lluis Torner
Opt. Lett. 36(1) 85-87 (2011)

Vortex ring beams in nonlinear P T-symmetric systems

Cristian Mejía-Cortés, Jesús Muñoz-Muñoz, and Mario I. Molina
Opt. Lett. 49(8) 1923-1926 (2024)

Partially PT symmetric optical potentials with all-real spectra and soliton families in multidimensions

Jianke Yang
Opt. Lett. 39(5) 1133-1136 (2014)