The optical bistability in a composite, composed of nonlinear metallic part
icles (spherical or cylindrical) with interfacial layers randomly embedded
in a linear dielectric host, is investigated theoretically. It is shown tha
t both interfacial property and the size of metallic particles can dramatic
ally affect the optical bistable behavior, and the threshold value is more
less in three dimension (3D) than in two dimension (2D) system under same p
hysical condition. (C) 2001 Elsevier Science B.V. All rights reserved.