Multi-Peak Solitons In Pt-Symmetric Bessel Optical Lattices With Defects

Keywords

defect solitons; lattice solitons; multi-peak solitons; PT-symmetry

Abstract

This paper presents a theoretical analysis of the existence and stability of multi-peak solitons in parity–time-symmetric Bessel optical lattices with defects in nonlinear media. The results demonstrate that there always exists a critical propagation constant μc for the existence of multi-peak solitons regardless of whether the nonlinearity is self-focusing or self-defocusing. In self-focusing media, multi-peak solitons exist when the propagation constant μ > μc. In the self-defocusing case, solitons exist only when μ < μc. Only low-power solitons can propagate stably when random noise perturbations are present. Positive defects help stabilize the propagation of multi-peak solitons when the nonlinearity is self-focusing. When the nonlinearity is self-defocusing, however, multi-peak solitons in negative defects have wider stable regions than those in positive defects.

Publication Date

10-1-2016

Publication Title

Frontiers of Physics

Volume

11

Issue

5

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s11467-016-0569-2

Socpus ID

84964727357 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84964727357

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