The properties of silica waveguide Bragg devices are analyzed.The field distribution of the transverse electric(TE) mode is given for the silica asymmetric slab waveguide.The characteristic equations for SiO2/ZnO/Air multilayered structures are obtained after writing the equations of state,equations of motion and Maxwell′s equations,then the displacement and the electromagnetic field in each region are found with the appropriate boundary conditions.The change of the relative dielectric permeability tensor b...