| 摘要 |
<p>A three-dimensional periodical structure whose period is about 1 mm or smaller is provided. Two or more films which have two-dimensionally substantially periodical projections are successively formed in layers substantially periodically to construct a structure which is substantially three-dimensionally periodical. For instance, the films are made of materials different in refractive index. The three-dimensional periodical structure whose period is about 1 mm or smaller can be obtained by a simple manufacturing method. By this structure, the propagation of a wave with a specific wavelength in a plurality of axial directions and in many solid angular directions including the thickness direction of the layers can be cut off.</p> |
