Abstract: An SERS element includes a substrate, a fine structure portion formed on a surface of the substrate and having a plurality of pillars, and a conductor layer formed on the fine structure portion and constituting an optical functional portion that causes surface-enhanced Raman scattering. A groove is provided in an outer surface of each pillar. A plurality of gaps are formed in the conductor layer by forming the conductor layer on the outer surface of each pillar in a state in which at least a portion of an inner surface of the groove is exposed.

Abstract: A surface-enhanced Raman scattering unit comprises a measurement board used upon measurement; a surface-enhanced Raman scattering element, secured to the measurement board, having a substrate and an optical function part, formed on the substrate, for generating surface-enhanced Raman scattering; and a pressing member, secured to the measurement board, having a ring-shaped contact part contacting a peripheral part of the surface-enhanced Raman scattering element and pressing the surface-enhanced Raman scattering element toward the measurement board.

Abstract: A SERS unit 1A comprises a SERS element 2 having a substrate and an optical function part 20 formed on the substrate, the optical function part 20 for generating surface-enhanced Raman scattering; a measurement board 3 supporting the SERS element 2 upon measurement; and a holding part 4 mechanically holding the SERS element 2 in the measurement board 3.

Abstract: A Fabry-Perot interference filter includes: a substrate having a first surface and a second surface facing each other; a first layer structure disposed on the first surface; and a second layer structure disposed on the second surface, wherein the first layer structure is provided with a first mirror portion and a second mirror portion facing each other with an air gap therebetween, and a distance between the first mirror portion and the second mirror portion is varied, and the second layer structure is formed with a separation region separating at least a part of the second layer structure into one side and another side in a direction along the second surface.

Abstract: A SERS element comprises a substrate having a front face; a fine structure part formed on the front face and having a plurality of pillars; and a conductor layer formed on the fine structure part and constituting an optical function part for generating surface-enhanced Raman scattering. The conductor layer has a base part formed along the front face and a plurality of protrusions protruding from the base part at respective positions corresponding to the pillars. The base part has a thickness greater than the height of the pillars.

Abstract: A SERS element comprises a substrate having a front face; a fine structure part formed on the front face and having a plurality of pillars; and a conductor layer formed on the fine structure part and constituting an optical function part for generating surface-enhanced Raman scattering. The conductor layer has a base part formed along the front face and a plurality of protrusions protruding from the base part at respective positions corresponding to the pillars. The base part is formed with a plurality of grooves surrounding the respective pillars when seen in the projecting direction of the pillars, while an end part of the protrusion is located within the groove corresponding thereto.

Abstract: A SERS unit 1A comprises a SERS element 2 having a substrate 21 and an optical function part 20 formed on the substrate 21, the optical function part 20 for generating surface-enhanced Raman scattering; a transportation board 3 supporting the SERS element 2 during transportation, the SERS element 2 being removed from the transportation board 3 upon measurement; and a holding part 4 having a pinching part 41 pinching the SERS element 2 in cooperation with the transportation board 3, and detachably holding the SERS element 2 in the transportation board 3.

Abstract: A surface-enhanced Raman scattering unit includes a surface-enhanced Raman scattering element including an optical functional portion that causes surface-enhanced Raman scattering, and a support member that supports the surface-enhanced Raman scattering element. The surface-enhanced Raman scattering element is fixed to the support member due to a magnetic force.

Abstract: A surface-enhanced Raman scattering unit comprises a measurement board used upon measurement; a surface-enhanced Raman scattering element, secured to the measurement board, having a substrate and an optical function part, formed on the substrate, for generating surface-enhanced Raman scattering; and a pressing member, secured to the measurement board, having a ring-shaped contact part contacting a peripheral part of the surface-enhanced Raman scattering element and pressing the surface-enhanced Raman scattering element toward the measurement board.

Abstract: A SERS unit 1A comprises a SERS element 2 having a substrate and an optical function part 20 formed on the substrate, the optical function part 20 for generating surface-enhanced Raman scattering; a measurement board 3 supporting the SERS element 2 upon measurement; and a holding part 4 mechanically holding the SERS element 2 in the measurement board 3.

Abstract: A SERS unit 1A comprises a SERS element 2 having a substrate 21 and an optical function part 20 formed on the substrate 21, the optical function part 20 for generating surface-enhanced Raman scattering; a transportation board 3 supporting the SERS element 2 during transportation, the SERS element 2 being removed from the transportation board 3 upon measurement; and a holding part 4 having a pinching part 41 pinching the SERS element 2 in cooperation with the transportation board 3, and detachably holding the SERS element 2 in the transportation board 3.

Abstract: A hydraulic system for an aircraft includes a brake operation device, a pressure supply, a reservoir, a shut-off valve, and a wheel brake. The shut-off valve is in fluid communication with and is disposed between the pressure supply and the brake valve. The shut-off valve can include a poppet, a first valve seat and a second valve seat. Movement of the poppet is controlled by operation of the brake operation device. The poppet is movable between a first position where the poppet acts against the first valve seat and a second position where the poppet acts against the second valve seat. In the first position, fluid flow is blocked between the pressure supply and the brake valve through the shut-off valve. In the second position, fluid flow is allowed between the pressure supply and the brake valve through the shut-off valve. The wheel brake is in fluid communication with and downstream from the shut-off valve.

Abstract: A SERS unit comprises an integrally formed handling board and a SERS element secured within a container space provided in the handling board so as to open to one side in a thickness direction of the handling board. The SERS element has a substrate arranged on an inner surface of the container space and an optical function part formed on the substrate, for generating surface-enhanced Raman scattering.