Patent ID: 8368898
Filing Date: 2013-02-05
Classification: B82Y,G02B

Abstract:
1. An optical apparatus for transmission or reflection of light having a first wavelength, comprising: a dielectric substrate; a first metal structure group in which multiple first metal structures are two-dimensionally disposed at intervals on a surface of the dielectric substrate in a discrete manner in an in-plane direction; a dielectric layer which covers the first metal structure group; and a unit to make a dielectric constant of at least one of the dielectric substrate and the dielectric layer variable, wherein: each of the multiple first metal structures has a first length equal to or shorter than the first wavelength in a first direction and a second length equal to or shorter than the first wavelength in a second direction that is perpendicular to the first direction; and the multiple first metal structures resonate with light entering one of the dielectric substrate and the dielectric layer to generate localized surface plasmon resonance on a surface of the multiple first metal structures so that a transmittance of the light having the first wavelength becomes a minimum value, or so that a reflectance of the light having the first wavelength becomes a maximum value.