Abstract:
An analysis apparatus includes an electric field enhancing element including a metallic layer, a light-transmissive layer, and a plurality of metallic particles arranged in a first direction and a second direction intersecting with the first direction; a light source irradiating the electric field enhancing element with at least one of linearly polarized light polarized in the first direction, linearly polarized light polarized in the second direction, and circularly polarized light; and a detector, in which localized surface plasmon and propagating surface plasmon are electromagnetically interacted, and when a thickness of the light-transmissive layer is G [nm], an effective reflective index of the light-transmissive layer is neff, and a wavelength of the excitation light is λi [nm], a relationship of the following expression (1) is satisfied. 20 [nm]
Abstract:
A plurality of metallic nano-body groups that includes metallic nano-bodies which are a size smaller than the wavelength of incident light and are dispersed on a dielectric surface is arranged in one direction at a pitch that resonates with the incident light. A long piece extends on the dielectric surface between adjacent metallic nano-body groups. The long piece is formed of a material having no free electron that performs resonance oscillation with the incident light. Localized surface plasmon resonance occurs in the metallic nano-body by the action of the incident light. Propagating surface plasmon resonance occurs by the action of the pitch. The propagating surface plasmon resonance is combined with the localized surface plasmon resonance. A so-called hybrid mode is established. The long piece is helpful in the establishment of the pitch.
Abstract:
An electronic field enhancement element includes: a metal layer; a dielectric layer provided on the metal layer; and a plurality of fine metal structures provided on the dielectric layer. A refractive index n of the dielectric layer satisfies n′=n+iκ and is in a range of 1≦n
Abstract:
An electronic field enhancement element includes: a metal layer; a dielectric layer provided on the metal layer; and a plurality of fine metal structures provided on the dielectric layer. A refractive index n of the dielectric layer satisfies n′=n+iκ and is in a range of 1≦n
Abstract translation:电子场增强元件包括:金属层; 设置在所述金属层上的电介质层; 以及设置在电介质层上的多个细金属结构体。 介电层的折射率n满足n'= n + i&kgr; 并且在1&lt; nlE; n <1.46的范围内,其中介电层的复折射率为n',虚数单位为i,消光系数为&kgr。
Abstract:
An analysis device is provided with an optical element having a structure in which the end portions of the upper surface and the lower surface of second metal layers are capable of having contact with a measurement object, and hotspots are exposed on the element surfaces. Therefore, it is easy for the substance that is the analysis object to be located at the hotspot. Further, since a first metal layer is disposed in the vicinity of the second metal layers, a resonance effect of a localized surface plasmon and a propagating surface plasmon can be generated. Therefore, the enhancement degree of light based on the plasmon is extremely high, and it is possible to analyze the substance with extremely high sensitivity.
Abstract:
An analysis device includes an optical element which includes a metal layer, a light transmitting layer on the metal layer, and a plurality of metal particles on the light transmitting layer arranged at a first interval P1 in a first direction and arranged at a second interval P2 in a second direction intersecting the first direction, P1
Abstract:
An optical element includes a metal layer in which a first direction is a thickness direction; metallic particles provided to be spaced from the metal layer in the first direction; and a light transmitting layer that separates the metal layer from the metallic particles, in which the size T of the metallic particles in the first direction satisfies a relationship of 3 nm≦T≦14 nm, and the size D of the metallic particles in a second direction orthogonal to the first direction satisfies a relationship of 30 nm≦D
Abstract:
An analysis apparatus includes an electric field enhancing element including a metallic layer, a transmissive layer on the metallic layer and transmitting excitation light, and metallic particles on the transmissive layer with first and second pitches in first and second directions; a light source irradiating the element with first direction linearly polarized light, second direction linearly polarized light, and/or circularly polarized light as the excitation light; and a detector detecting light from the element. The pitches are selected relative to the pitch of a diffraction grating. The thickness of the transmissive layer is selected relative to the wavelength of the excitation light.
Abstract:
An optical element includes a metal layer having a thickness in a first direction; metallic particles spaced apart from the metal layer in the first direction; and a light transmitting layer separating the metal layer from the metallic particles. The metallic particles are disposed in a lattice shape in a second direction orthogonal to the first direction and in a third direction orthogonal to the first direction and the second direction. A distance between adjacent metal particles in the second and third directions is S, and 6 nm
Abstract:
A plurality of metallic nano-body groups that includes metallic nano-bodies which are dispersed on a dielectric surface at a first pitch smaller than the wavelength of incident light is arranged in one direction at a second pitch that resonates with the incident light. Localized surface plasmon resonance occurs in the metallic nano-body by the action of the incident light. Propagating surface plasmon resonance occurs by the action of the second pitch. The propagating surface plasmon resonance is combined with the localized surface plasmon resonance. A so-called hybrid mode is established.