Fundamental solitons in parity-time symmetric lattice with a vacancy defect


Bagci M., BAKIRTAS I., Antar N.

OPTICS COMMUNICATIONS, vol.356, pp.472-481, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 356
  • Publication Date: 2015
  • Doi Number: 10.1016/j.optcom.2015.08.008
  • Journal Name: OPTICS COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.472-481
  • Istanbul Technical University Affiliated: Yes

Abstract

We put forward a mechanism for delaying the collapse of the fundamental solitons in nonlinear media whose dynamics is governed by two-dimensional nonlinear Schrodinger (NLS) equation with parity-time symmetric (PT-symmetric) periodic potentials with/without a vacancy defect. We observed that strengthened gain-loss component (imaginary part of the potential) in the periodic lattice impoverish the stability properties of the solitons, on the other hand adding a vacancy defect to the periodic PT-symmetric lattice acts as a delaying mechanism for collapsing solitons. (C) 2015 Elsevier B.V. All rights reserved.