Correlation length and negative phase velocity in isotropic dielectric-magnetic materials
Correlation length and negative phase velocity in isotropic dielectric-magnetic materials
A composite material comprising randomly distributed spherical particles of two different isotropic dielectric-magnetic materials is homogenized using the second-order strong-property-fluctuation theory in the long-wavelength approximation. Whereas neither of the two constituent materials by itself supports plane wave propagation with negative phase velocity (NPV), the homogenized composite material (HCM) can. The …