A study on 1-D photonic crystals composed of oxide multilayers

Multilayers, consisting of oxide layers, have been designed for 1-D photonic crystals. The optical transfer behavior at normal incidence was calculated in the visible range. The computed results show that the complete reflectance can be achieved when the structural repetition number is large enough. The more the number of periods is, the better control over the fine details of spectral reflectance profile is found. It is interesting that a defect mode can be obtained when the half-wavelength-thick layer is sandwiched symmetrically by two quarter-wavelength-thick layers. More defect modes are observed when the sandwiched layer is magnetic. However, no defect mode is formed when the thickness of sandwiched layer is a quarter wavelength. The designed multilayers were also fabricated to confirm the predicted properties.