Vortex and dipole solitons in lattices possessing defects and dislocations

Bagci M., Bakırtaş Akar İ., Antar N.

OPTICS COMMUNICATIONS, cilt.331, ss.204-218, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 331
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.optcom.2014.06.005
  • Dergi Adı: OPTICS COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.204-218
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

We report the numerical existence of dipole and vortex solitons for the two-dimensional nonlinear Schrodinger (NLS) equation with external potentials that possess strong irregularities, i.e., edge dislocations and a vacancy defects. Multi-humped solitons are computed by employing a spectral fixed-point computational scheme. The nonlinear stability of these solitons is investigated using direct simulations of the NLS equation and it is observed that these multi-humped modes in the defect lattices can be stable or unstable. (C) 2014 Elsevier B.V. All rights reserved.