Abstract: The present disclosure relates to a solid-state imaging element and an electronic device capable of effectively inhibiting occurrence of reflection and diffraction of light on a light incident surface. A fine uneven structure including a recess and a protrusion is formed with a predetermined pitch on a light incident surface of a semiconductor layer in which photoelectric conversion sections are formed for a plurality of pixels; and an antireflective film is laminated on the fine uneven structure, the anti reflective film being formed with a film thickness different for each color of light received by each of the pixels. The pitch of one of the recess and protrusion formed in the fine uneven structure is generally identical in all the pixels, and is 100 nm or less. The present technology is applicable, for example, to a solid-state imaging element.

Abstract: The present disclosure relates to a solid-state imaging element and an electronic device capable of effectively inhibiting occurrence of reflection and diffraction of light on a light incident surface. A fine uneven structure including a recess and a protrusion is formed with a predetermined pitch on a light incident surface of a semiconductor layer in which photoelectric conversion sections are formed for a plurality of pixels; and an antireflective film is laminated on the fine uneven structure, the antireflective film being formed with a film thickness different for each color of light received by each of the pixels. The pitch of one of the recess and protrusion formed in the fine uneven structure is generally identical in all the pixels, and is 100 nm or less. The present technology is applicable, for example, to a solid-state imaging element.

Abstract: An optical body includes a first optical layer, a second optical layer having an incident surface on which light is incident, and a reflecting layer sandwiched between the first and second optical layers, wherein the first optical layer includes a plurality of convex or concave structures formed on or in a surface thereof on which the reflecting layer is disposed, ridges of the convex structures or ridges between the concave structures adjacent to each other have tip portions projecting toward the incident surface side, the tip portions are deformed from an ideal shape, the second optical layer is transparent and has a refractive index of 1.1 or more and 1.9 or less, and the optical body selectively directionally reflects part of light entering the incident surface, which part is in a specific wavelength band, in direction other than the specular reflection direction.

Abstract: An optical element includes a surface on which a plurality of structures is provided. The plurality of structures is provided to be fluctuated in a random direction from a lattice point at an interval which is equal to or shorter than a wavelength of visible light.

Abstract: An optical element is provided with a wavelength-selective reflection layer having a five-layer configuration in which high-refractive-index layers and metal layers are alternately stacked. The present invention is designed so that the ratio ? of an optical film thickness db of the entire metal layer relative to an optical film thickness da of the high-refractive-index layers as a whole, and the ratio ? (=d3/d1) of an optical film thickness d3 of the third high-refractive-index layer with respect to the optical film thickness d1 of the first high-refractive-index layer as viewed from either the first optical layer side or the second optical layer side are included within a predetermined range.

Abstract: An optical element has a first optical layer; a reflective layer; and a second optical layer. The reflective layer includes at least five layers of high refractive-index layers and metal layers alternately laminated. When a thickness L of the entire reflective layer is 80 nm, a ratio ? of an optical thickness of the entire metal layers to that of the entire high refractive-index layers and a ratio ? of an optical thickness of a third high refractive-index layer to that of a first high refractive-index layer are included in a first region, when the thickness L is 90 nm, the ratios ? and ? are included in a second region, and when the thickness L is 80 to 90 nm, the ratios ? and ? are included in a space enclosed by the first region, the second region, and straight lines derived from these regions.

Abstract: A photoelectric conversion device enabling an improvement in photoelectric conversion efficiency and a method of manufacturing the photoelectric conversion device are provided. A solar cell includes a transparent substrate having, on a surface, a three-dimensional structure where a plurality of convex portions are regularly arranged, and a light receiving element being provided on the surface of the transparent substrate, and including a transparent electrode, a photoelectric conversion layer, and a reflective electrode in this order of closeness to the transparent substrate. At least the transparent electrode of the light receiving element has a three-dimensional structure in accordance with the three-dimensional structure on a surface on a side opposite to the transparent substrate. The photoelectric conversion layer effectively absorbs incident light, and allows an electric field to be concentrated, causing an increase in current density.

Abstract: A photoelectric conversion element includes a substrate that has a first unevenness structure including a plurality of first convex portions on one principal surface and a second unevenness structure formed on a surface of the first unevenness structure and including a plurality of second convex portions. A light-receiving element is formed on the one principal surface of the substrate and includes a first electrode, a photoelectric conversion layer, and a second electrode in this order from the side of the substrate. At least the first electrode of the light-receiving element has a third unevenness structure replicated from one or both of the first and second unevenness structures on a surface opposite to the substrate.

Abstract: An optical body includes a first optical layer, a second optical layer having an incident surface on which light is incident, and a reflecting layer sandwiched between the first and second optical layers, wherein the first optical layer includes a plurality of convex or concave structures formed on or in a surface thereof on which the reflecting layer is disposed, ridges of the convex structures or ridges between the concave structures adjacent to each other have tip portions projecting toward the incident surface side, the tip portions are deformed from an ideal shape, the second optical layer is transparent and has a refractive index of 1.1 or more and 1.9 or less, and the optical body selectively directionally reflects part of light entering the incident surface, which part is in a specific wavelength band, in direction other than the specular reflection direction.

Abstract: An optical element has a first optical layer; a reflective layer; and a second optical layer. The reflective layer includes at least five layers of high refractive-index layers and metal layers alternately laminated. When a thickness L of the entire reflective layer is 80 nm, a ratio ? of an optical thickness of the entire metal layers to that of the entire high refractive-index layers and a ratio ? of an optical thickness of a third high refractive-index layer to that of a first high refractive-index layer are included in a first region, when the thickness L is 90 nm, the ratios ? and ? are included in a second region, and when the thickness L is 80 to 90 nm, the ratios ? and ? are included in a space enclosed by the first region, the second region, and straight lines derived from these regions.