Nonlinear Response of Granular Composite Mediurn |
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Authors: | Jia-Jun WANG Zhen-Ya LI |
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Institution: | 1. Department of Physics, Suzhou University, Suzhou 215006, China;
2. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China |
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Abstract: | In this paper, the linear and nonlinear responses of granular composite medium consisting of spherical grains with coating shells embedded in a host medium are studied. We assume that the shell and the host medium are linear (the dielectric constants of which are ε0 and εm0 respectively), while the spherical grain is nonlinear (the diektric constant of which is εc = εc0 + χc|Ec|β). Starting from the definition (D) = εeff and taking in to account the corrections to the local field within the spherical grains, expressions for the linear and high-order nonlinear susceptibilities are presented. |
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