It is shown that Sole filter structure under certain conditions of the alte
rnating anisotropic layers acts as a perfect reflector at all angles, any p
olarization and over a wide spectral range thus can act as a photonic band
gap structure. Near this behavior a total 90 degrees polarization rotation
is obtained upon reflection over a large range of angles or wavelengths. (C
) 2000 Elsevier Science B.V. All rights reserved.