摘要:
A spectrometry apparatus includes a transmissive diffraction grating that transmits incident light. The transmissive diffraction grating has inclined surfaces made of a first dielectric material. The inclined surfaces are arranged so that they are inclined relative to a reference line. When the angle of incidence of light incident on the transmissive diffraction grating is measured with respect to the reference line and defined as an angle α, and the angle of diffraction of diffracted light is measured with respect to the reference line and defined as an angle β, the angle of incidence α is smaller than a Bragg angle θ defined with respect to the inclined surfaces, and the angle of diffraction β is greater than the Bragg angle θ.
摘要:
An optical device includes a group of projections projecting from a conductor surface of a substrate, and arranged along a first direction at a pitch Px, a dielectric layer covering the conductor surface and the group of projections, and a metal nanostructure having metal nanoparticles each having a size d of the order of nanometers arranged on the dielectric layer along the first direction, assuming that the wavelength of irradiation light is λ, λ>Px>d is fulfilled, and assuming that a maximum value of an arrangement pitch between two of the metal nanoparticles adjacent to each other in the first direction is Qx, Px>Qx is fulfilled.
摘要:
A method for producing a fine structure includes: (a) forming a photosensitive film to cover a plurality of first convex portions formed in at least one surface of a substrate; (b) arranging liquid to cover the photosensitive film on the at least one surface of the substrate; (c) arranging a transparent parallel plate such that the parallel plate opposes the substrate via the liquid; (d) generating interference field by a laser beam to irradiate the interference field onto the photosensitive film via the parallel plate and the liquid; (e) removing the liquid and the parallel plate to develop the photosensitive film so as to form a photosensitive film pattern; and (f) etching the substrate using a mask of the photosensitive film pattern to form a plurality of fine convex portions smaller than the first convex portions on the at least one surface of the substrate. In the method, the liquid arranged at step (b) has a refractive index larger than 1 and equal to or smaller than a refractive index of the photosensitive film.
摘要:
A detection apparatus includes: a first light source group having a plurality of light sources; a switch that switches the plurality of light sources to activate at least one of the light sources, a first optical system that introduces light from the activated light source into an electrical conductor of an optical device; and a detector that detects Raman scattering light from the light scattered or reflected by the electrical conductor. Each of the plurality of light sources of the first light source group is capable of radiating light having different polarization directions.
摘要:
An optical device unit includes: an optical device which has an electrical conductor and is capable of enhancing Raman scattering light generated by receiving light from a light source; and a first guide unit which guides a gaseous sample to the optical device. The optical device unit is detachable from the detection apparatus.
摘要:
An optical device includes a projection group in which electrically conductive projections are arranged along a direction parallel to a virtual plane. The arrangement period of the projections in the projection group includes at least a first period and a second period different from the first period. The first period and the second period are shorter than a wavelength of an incident light.
摘要:
An optical device includes a first projection group in which electrically conductive projections are arranged at a first period along a direction parallel to a virtual plane. When light traveling in a direction inclined with respect to a vertical line directed to the virtual plane is incident on the first projection group, surface plasmon resonance is generated at a first resonance peak wavelength and a second resonance peak wavelength. A first resonance peak wavelength band including the first resonance peak wavelength includes an excitation wavelength in surface-enhanced Raman scattering. A second resonance peak wavelength band including the second resonance peak wavelength includes a Raman scattering wavelength in the surface-enhanced Raman scattering.
摘要:
A sensor chip includes: a substrate that has a planar portion; and a diffraction grating, on which a target substance is placed, that includes a plurality of first protrusions periodically arranged in a period equal to or greater than 100 nm and equal to or less than 1000 nm in a first direction that is parallel to the planar portion, a plurality of base portions that is located between two of the first protrusions adjacent to each other and configures a base of the substrate, and a plurality of second protrusions that is formed on upper faces of the plurality of the first protrusions, has a surface formed from a metal, and is formed on the planar portion.
摘要:
An optical element includes a diffraction function layer for diffracting at least a part of incident light and a grid disposed on a first surface of the diffraction function layer and including a plurality of wires. The first surface includes a plurality of first areas and a plurality of second areas. The first areas and the second areas are different from each other in a height from a second surface of the diffraction function layer as a surface opposite to the first surface. Steps are provided on boundaries between the first areas and the second areas.
摘要:
An optical element, includes: a diffractive functional layer which diffracts at least part of incident light; and a grid formed on a first surface of the diffractive functional layer, the grid including a plurality of fine wires and having a polarization separation function; wherein the optical element reflects a part of the incident light while transmitting another part of the incident light, the first surface of the diffractive functional layer including a plurality of first regions; a plurality of second regions, a height thereof relative to a second surface of the diffractive functional layer being different from that of the first regions, the second surface being an opposite surface to the first surface; and a step provided at a border between the first regions and the second regions.