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Spatiotemporal light dynamics of coupled bistable thin films

The light propagation through a system of coupled bistable thin films is considered. In the limit of short relaxation times the problem is reduced to a infinite-dimension map. It is shown that self-pulsation regimes occur when the incident light intensity is not high enough to switch all bistable elements in the upper state. In the case of the gaussian incident beam, spatio-temporal structures of the beam profile are studied.