| 摘要 |
PURPOSE:To cut a noise component by alternately forming thin films having different refractive indices and shaping multilayer thin-film layers filling the role of an interference filter onto a light-emitting surface. CONSTITUTION:Silicon oxide(SiO2) films 12 having film thickness of lambda/4n and a refractive index n1(=1.46) and amorphous silicon (alpha-Si) films 13 having film thickness of lambda/4n and a refractive index n2(=3.5) are laminated alternately, n1/n2 in the refractive indices are used as conditions, and the refractive index of a non-metallic film 11 at a central position is not related. Consequently, when multilayer films having two kinds of refractive indices are shaped repeatedly on both sides of the non-metallic film 11, high reflectivity functioning as a mirror to the non-metallic film 11 is formed, light having a wavelength except a specified wavelength is annihilated through repetition by high reflection in the non-metallic film 11, only light having the specified wavelength is left, and only the light is transmitted and light is emitted. Accordingly, the noise component of an emission spectrum is cut, and monochromatic light having a single wavelength can be emitted. |
