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Manipulation of Solitary Structures in a Nonlinear Optical Single Feedback Experiment

Interest in spatial solitary structures originates from their characteristics to enable a locally self-confined switching between a dark background state and a bright spot. We report on the control and addressing of solitary structures in a single feedback experiment with a liquid crystal based reflective optically addressable spatial light modulator (OaSLM) as nonlinearity. In general the lateral positions of solitary structures are strongly influenced by mutual spot interaction and system inhomogeneities. Pinning, drifting and spontaneous disappearance of solitary spots determines the system behavior. For photonic applications these effects must be minimized. A control method based on a Fourier filtering method was studied in order to position solitary spots. Numerical and experimental results show that solitary spots can be aligned to periodic grids of hexagonal or square geometries.