It is shown that, when two coherent waves are obliquely incident to a one-dimensional nonlinear optical superlattice containing Kerr-form dielectric nonlinearity, an incident-dependent t w e dimensional nonlinear optical superlattice can be constructed. This structure can be bistable.There exist two types o f optical bistable mechanism, i. e., the index-modulation mechanism and distributed feedback mechanism. Owing to the index-modulation mechanism, the threshold for the bistability is lower than that o f a more traditional one-dimensional distributed feedback structure.

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