Microscopic theory of linear rand nonlinear optical and dielectric response in polymer materials

The optical and dielectric properties of polymer from the microscopic structure and molecular response were calculated by a self-consistent cavity model. The polymers are treated as discrete molecules inside a cavity and as a continuum outside. Three linear responses of an isotropic polymers for three types of molecular polarizability were studied. These are: dipolar responses that are local within molecules and nonlocal within and between molecules; and distributed monopolar and dipolar response that is nonlocal within molecules but local between molecules. The effective polarizability that gives the exact linear susceptibility from the Lorentz expression was derived.