Solitons in PT-symmetric periodic systems with the logarithmically saturable nonlinearity

Sci Rep. 2016 Sep 6:6:32990. doi: 10.1038/srep32990.

Abstract

We report on the formation and stability of induced solitons in parity-time (PT) symmetric periodic systems with the logarithmically saturable nonlinearity. Both on-site and off-site lattice solitons exist for the self-focusing nonlinearity. The most intriguing result is that the above solitons can also be realized inside the several higher-order bands of the band structure, due to the change of nonlinear type with the soliton power. Stability analysis shows that on-site solitons are linearly stably, and off-site solitons are unstable in their existence domain.

Publication types

  • Research Support, Non-U.S. Gov't