Patent ID: 9097906
Filing Date: 2015-08-04
Classification: G02B,H04N

Abstract:
1. An optical element, comprising: a substrate including a first surface; and a metal structure group including a plurality of three-dimensional metal structures, each of the metal structures having a first dimension in a first direction and a second dimension in a second direction perpendicular to the first direction, and having a thickness in a third direction, the metal structures made of metal containing aluminum and being arranged on the first surface of the substrate in a two-dimensional array of rows and columns in an isolated manner, wherein the metal structures are capable of generating localized surface plasmon resonance by receiving light incident thereupon, wherein each dimension of each of the metal structures in the first, second and third directions is equal to or less than a wavelength of light in a visible light range; wherein the incident light is incident on the metal structure group in an oblique manner with respect to the normal to the first surface of the substrate, wherein the incident light is divided into transmitted light that passes through the metal structure group and reflected light that is reflected by the metal structure group, wherein transmittance of light having a first polarization state has a minimum value in a first wavelength range of the incident light, and transmittance of light having a second polarization state has a minimum value in a second wavelength range of the incident light, and the first wavelength range and the second wavelength range are different from each other, and wherein the first dimension and the second dimension are in the range of 90 nm or more and 150 nm or less, and the thickness in the third direction is in the range of 10 nm or more and 150 nm or less, and the metal structures are periodically arranged at a period in the range of 180 nm or more and 300 nm or less.