https://doi.org/10.1140/epjd/e2015-60373-3
Regular Article
Tunable all-optical gates in 2D discrete cavity solitons with local defect
1
Photonics Group, Research Institute for Applied Physics and
Astronomy, University of Tabriz, Tabriz, Iran
2
Department of Physics, Payame Noor University,
P.O.Box 19395-3697,
Tehran,
Iran
3
Photonics Group, Aras International Campus, University of
Tabriz, Tabriz,
Iran
a
e-mail: k_aghdami@yahoo.com
Received: 24 June 2015
Received in final form: 19 August 2015
Published online: 10 December 2015
We numerically studied the existence of discrete cavity solitons in a two-dimensional array of coupled optical cavities with Kerr nonlinearity influenced by a local Gaussian defect. Effect of the defect on soliton on/off switching by injecting a writing/erasing external beam is also discussed. The interaction of two adjacent solitons, mediated by a defect is considered and effect of the positive and negative defect on the independency interval is determined. Finally all-optical NOR and NAND logic gates are proposed which are tunable by well-adjusting the defect height.
Key words: Optical Phenomena and Photonics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2015
