Stability of Optical Solitons in Parity-Time-Symmetric Potentials with Competition Nonlinearity |
| C. Huang
College of Physics and Materials Science, Tianjin Normal University, 393 Bin Shui West Road, Xi Qing District, Tianjin 300387, China |
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| This study investigates the existence, stability, and propagation of fundamental, dipole, and tripole modes in parity-time symmetric potentials with competing cubic and quintic nonlinearities. We discuss such parity-time solitons in the presence of a focusing quintic nonlinearity and a defocusing cubic nonlinearity. Assuming a fixed quintic nonlinearity coefficient σ2 of 1, these solitons can exist and remain stable within a suitable power range. Fundamental solitons can remain stable even for lower values of σ1, while dipole and tripole solitons may only be stable for larger values of σ1. By employing appropriate parameters, a significant proportion of solitons can be stabilized. The stability and propagation of the solitons are demonstrated through linear stability analysis and direct numerical simulations. |
DOI:10.12693/APhysPolA.146.87 topics: optical solitons, parity-time (PT) symmetry, stability, cubic and quintic nonlinearity |