Artificial double refracting medium

Abstract

Abstract PURPOSE:To make controllable the magnitude of a main refractive index and double refraction by laminating alternately two kinds of amorphous dielectric materials having different refractive indices at the period substantially smaller than the wavelength of light. CONSTITUTION:Two kinds of the amorphous dielectric materials 1 and 2 which have different refractive indices and are alternately laminated at the period substantially smaller than the wavelength of light are disposed on a substrate 3 and the artificial refracting medium is constituted of the periodic multi-layered films consisting of the materials 1 and 2. The multi-layered films act as the negative uniaxial double refracting medium of which the optical axis is the normal 4 of the layers. The magnitude of the main refractive index and double refraction can be changed simply by changing the ratio of the multi-layered films with the period. The larger double refraction than heretofore is realized with some materials. The artificial constitution of the double refracting medium having optional and desired characteristics is thus made possible by changing the main refractive index and double refraction.

Inventors

• 👤 Katsuhiro Kitagawa
• 👤 勝浩 北川
• 👤 Mitsuhiro Tatsuta
• 👤 立田　光廣

Bibliographic Details