THE INFLUENCE OF NONLINEAR AND LINEAR DEFECTS ON THE LIGHT PROPAGATION THROUGH LINEAR ONE-DIMENSIONAL PHOTONIC LATTICE

Slavica Kuzmanović; Marija Stojanović Krasić; Ana Mančić; Branko Drljača; Milutin Stepić

doi:10.5937/univtho6-12670

Slavica Kuzmanović Faculty of Natural Sciences and Mathematics, University of Priština, Kosovska Mitrovica
Marija Stojanović Krasić Faculty of Technology, University of Niš, Leskovac
Ana Mančić Faculty of Natural Sciences and Mathematics, University of Niš, Niš
Branko Drljača Faculty of Natural Sciences and Mathematics, University of Priština, Kosovska Mitrovica
Milutin Stepić Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade

DOI: https://doi.org/10.5937/univtho6-12670

Keywords: control of light propagation, light localization, linear defect, nonlinear defect, waveguide array,

Abstract

In this paper, the light beam propagation through one-dimensional photonic lattice, possessing one nonlinear defect and one linear defect, has been investigated numerically. Different dynamical regimes have been identified in terms of the distance between the two defects, position of the incident light beam, the width of linear defect, the values of nonlinearity and presence of the transverse kick. Strong localized modes on the defects, breathing and zig-zag modes in the area between defects have been observed. It has been concluded that the width of the linear defect placed next to the nonlinear one influences localization of the beam at the nonlinear waveguide. On the other hand, the nonlinear defect, regardless of the values of nonlinearity, have a small influence on the beam propagation in photonic lattice. It has been observed that the transverse kick of the initial beam leads to the distortion of localized structures. By launching the light beam towards defects, the reflection of light has been noticed. Presented results can be useful for different applications, such as blocking, filtering and routing of light beam through optical media.

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