Effective beam width at the lattice output is depicted as a function of the disorder level, for different defect sizes

Figure 5. Effective beam width at the lattice output is depicted as a function of the disorder level, for different defect sizes. The insets depict the sketch of the system geometry (the cross marks the locations of the input Gaussian beam), and two typical intensity distributions of the localized modes. Parameters are as in figure 3.

Abstract

The Anderson localization of light at the interface separating square and hexagonal photonic lattices is demonstrated numerically. The influence of varying lattice intensities and disorder level on the transverse localization of light is discussed. Both suppression and enhancement of light localization in the presence of the interface, depending on the difference in the lattice intensity in both regions, and the position of the excited lattice site are demonstrated. Such localization is compared to the cases with no interfaces. Also, it is analysed how the presence of a phase-slip defect modifies the phenomenon of Anderson localization of light at the interface.