4.5 Achievement of Phase Matching
95
(a)
(b)
Fig. 4.6 Birefringence by a calcite crystal. a Schematic illustration, b two images of a single object
as seen through a calcite crystal
indices of the medium. Such materials whose refractive index or permittivity is polarization dependent are called anisotropic materials.
We know that displacement vector D = where is the permittivity and E is
the electric field vector. In general, various components of the displacement vector
can be written as
95
(a)
(b)
Fig. 4.6 Birefringence by a calcite crystal. a Schematic illustration, b two images of a single object
as seen through a calcite crystal
indices of the medium. Such materials whose refractive index or permittivity is polarization dependent are called anisotropic materials.
We know that displacement vector D = where is the permittivity and E is
the electric field vector. In general, various components of the displacement vector
can be written as