Abstract
The intrinsic optical bistability of nonlinear composites, in which linear small metallic spherical particles are embedded in a weakly nonlinear dielectric host is investigated by using the self-consistent mean-field approximation and spectral representation. It is found that the threshold intensity strongly depends on the metallic volume fraction and component properties, and there exists a critical volume fraction of metallic particles; beyond the critical fraction, bistability cannot be observed.
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