Premium
Effective cubic nonlinear response of a coated granular composite medium
Author(s) -
Liu Xinyu,
Li Zhenya
Publication year - 1996
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221960128
Subject(s) - nonlinear system , dielectric , materials science , shell (structure) , composite number , dielectric response , volume fraction , granular material , composite material , physics , optoelectronics , quantum mechanics
An approximate expansion method is developed to study the bulk effective response of a nonlinear dielectric granular composite. The system considered here is composed of some grains with the same structure and properties (linear cores and cubic nonlinear concentric shells) randomly distributed in a linear host. An approximate method is invoked for deducing the effective nonlinear susceptibility of such a system. As we introduce a structural parameter λ representing the thickness of the coating shell, we discuss the influence of this structural parameter on the bulk effective nonlinear response in the whole system. Through adjusting both the dielectric properties of each component and the structural parameter, we can obtain the enhancement of the effective nonlinear response of the system. Our solutions are valid and useful to deal with a nonlinear dielectric system with a small volume fraction of nonlinear grains.