Abstract: An electrode (2) of metallic material comprising an axis of revolution (6) and a bottom face (2a) of outer diameter greater than the outer diameter of a top face (2b), characterized in that it comprises a fin (10) of revolution about said axis of revolution (6), on the bottom part of the lateral face (2c), said fin (10) having a radial length L and a thickness h such that the ratio L/h is below a threshold, L and h observing the following relationship: L . L 3 h ? 2 ? EX 5 ? ? 3 in which: E represents the Young's modulus of the metallic material; X represents the minimum deflection tolerated by the fin; and ? represents the thermal stress acting on the fin.

Abstract: A spectral filter (150.1-150.4) comprising at least one metallic layer (101) structured by at least one hole (250.1-250.4) passing through two opposite mains faces of the metallic layer and comprising, in a plane parallel to a plane of one of the two main faces, a first rectangular section whereof a first side has a dimension between around 40 nm and 100 nm, and whereof a second side, perpendicular to the first side, has a dimension between around 150 nm and 1000 nm, and a second rectangular section centered relative to the first rectangular section, a first side of the second section being parallel to the second side of the first section and having a dimension between around 40 nm and 100 nm.

Abstract: An electrode (2) of metallic material comprising an axis of revolution (6) and a bottom face (2a) of outer diameter greater than the outer diameter of a top face (2b), characterized in that it comprises a fin (10) of revolution about said axis of revolution (6), on the bottom part of the lateral face (2c), said fin (10) having a radial length L and a thickness h such that the ratio L/h is below a threshold, L and h observing the following relationship: L . L 3 h ? 2 ? EX 5 ? ? 3 in which: E represents the Young's modulus of the metallic material; X represents the minimum deflection tolerated by the fin; and a represents the thermal stress acting on the fin.

Abstract: An electrode (2) of metallic material comprising an axis of revolution (6) and a bottom face (2a) of outer diameter greater than the outer diameter of a top face (2b), characterized in that it comprises a fin (10) of revolution about said axis of revolution (6), on the bottom part of the lateral face (2c), said fin (10) having a radial length L and a thickness h such that the ratio L/h is below a threshold, L and h observing the following relationship: ? ? ? indicates text missing or illegible when filed ? in which: E represents the Young's modulus of the metallic material; X represents the minimum deflection tolerated by the fin; and ? represents the thermal stress acting on the fin.

Abstract: This bolometric array detector for detecting electromagnetic radiation in a predetermined range of infrared or terahertz wavelengths comprises a substrate and an array of bolometric micro-plates for detecting said radiation that are suspended above the substrate by support arms. It comprises a metallic membrane located above and around each micro-plate and in which openings are formed; said openings in metallic membrane are periodically located in it along at least one predetermined axis with a period equal to or less than ? n , where ? is a wavelength in the wavelength range that is to be detected and n is the average refraction index of the medium that separates the micro-plate from metallic membrane.

Abstract: A gyrolaser comprises: a ring-shaped optical cavity and a gaseous medium, and at least three electrodes in contact with the gas of the amplification medium, the electrodes generating charges when ignition voltage is applied; the cavity and distribution of the electrodes comprising at least one plane of symmetry perpendicular to the plane of the cavity and passing through the electrode of first type; at least one conductive ignition element set at a predetermined potential, the shape and arrangement being such that symmetry is maintained; the electrically conductive element generating an electric field locally for guiding the charges so they are distributed symmetrically in a first flow and second flow in the first and second discharge areas respectively when the ignition voltage is applied, in such a way that a first plasma and a second plasma are initiated simultaneously, respectively, in the first discharge area and in the second discharge area.

Abstract: The electromagnetic radiation detection device includes, on a same substrate: at least one active detector of the electromagnetic radiation provided with a first element sensitive to said radiation, at least one reference detector including a second element sensitive to said electromagnetic radiation, and a lid provided with first reflective means reflecting the incident electromagnetic radiation, said lid covering without contact the second sensitive element and defining with the substrate a cavity having the reference detector housed therein. The lid is designed to improve the sensitivity of the detection device.

Abstract: A bolometric array detector for detecting electromagnetic radiation in a predetermined range of infrared wavelengths includes a substrate; an array of bolometric micro-plates for detecting the radiation suspended above the substrate by support arms; and metallic reflectors formed on the substrate underneath the micro-plates to reflect that portion of the radiation which has passed through said micro-plates without being absorbed by the latter. For each micro-plate, a corresponding reflector includes a first part located underneath the micro-plate which extends as a second part not positioned underneath the micro-plate. At least the second part has surface texturing in a repeating pattern for coupling a portion of incident radiation on the second part to a guided wave that propagates towards the first part of the reflector positioned underneath micro-plate.

Abstract: The electromagnetic radiation detection device includes, on a same substrate: at least one active detector of the electromagnetic radiation provided with a first element sensitive to said radiation, at least one reference detector including a second element sensitive to said electromagnetic radiation, and a lid provided with first reflective means reflecting the incident electromagnetic radiation, said lid covering without contact the second sensitive element and defining with the substrate a cavity having the reference detector housed therein. The lid is designed to improve the sensitivity of the detection device.

Abstract: An integrated optical coupler including in the medium separating a first integrated waveguide from a second substantially parallel integrated waveguide, a succession of strips parallel to one another and orthogonal to the general direction of the waveguides, said strips being made of a material having an absorption preventing the propagation of an electromagnetic wave across its volume, and having: a length H equal to k?/2nmedium, where k is an integer, ? is the central wavelength used, and nmedium is the optical index of the medium between the waveguides; a period P smaller than ?/2nmedium; and ends at a distance shorter than ?/10 from the waveguides.

Abstract: Method for fabricating a substrate comprising a nanostructured surface for an organic light emitting diode OLED, in which a layer of an organic resin or of a mineral material having a first nanostructuration is prepared by nano-imprint; the organic resin or mineral material is heated to a temperature equal to or higher than its glass transition temperature Tg or its melting point, and the organic resin or the mineral material is maintained at this temperature for a time tR called annealing time, whereby the organic resin or the mineral material flows and the first nanostructuration of the layer of organic resin or of mineral material is modified to produce a second nanostructuration; the organic resin or the mineral material is cooled.

Abstract: This bolometric array detector for detecting electromagnetic radiation in a predetermined range of infrared or terahertz wavelengths comprises a substrate and an array of bolometric micro-plates for detecting said radiation that are suspended above the substrate by support arms. It comprises a metallic membrane located above and around each micro-plate and in which openings are formed; said openings in metallic membrane are periodically located in it along at least one predetermined axis with a period equal to or less than ? n , where ? is a wavelength in the wavelength range that is to be detected and n is the average refraction index of the medium that separates the micro-plate from metallic membrane.

Abstract: A bolometric array detector for detecting electromagnetic radiation in a predetermined range of infrared wavelengths includes a substrate; an array of bolometric micro-plates for detecting the radiation suspended above the substrate by support arms; and metallic reflectors formed on the substrate underneath the micro-plates to reflect that portion of the radiation which has passed through said micro-plates without being absorbed by the latter. For each micro-plate, a corresponding reflector includes a first part located underneath the micro-plate which extends as a second part not positioned underneath the micro-plate. At least the second part has surface texturing in a repeating pattern for coupling a portion of incident radiation on the second part to a guided wave that propagates towards the first part of the reflector positioned underneath micro-plate.

Abstract: A spectral filter (150.1-150.4) comprising at least one metallic layer (101) structured by at least one hole (250.1-250.4) passing through two opposite mains faces of the metallic layer and comprising, in a plane parallel to a plane of one of the two main faces, a first rectangular section whereof a first side has a dimension between around 40 nm and 100 nm, and whereof a second side, perpendicular to the first side, has a dimension between around 150 nm and 1000 nm, and a second rectangular section centred relative to the first rectangular section, a first side of the second section being parallel to the second side of the first section and having a dimension between around 40 nm and 100 nm.

Abstract: An integrated optical coupler including in the medium separating a first integrated waveguide from a second substantially parallel integrated waveguide, a succession of strips parallel to one another and orthogonal to the general direction of the waveguides, said strips being made of a material having an absorption preventing the propagation of an electromagnetic wave across its volume, and having: a length H equal to k?/2nmedium, where k is an integer, ? is the central wavelength used, and nmedium is the optical index of the medium between the waveguides; a period P smaller than ?/2nmedium; and ends at a distance shorter than ?/10 from the waveguides.

Abstract: Method for fabricating a substrate comprising a nanostructured surface for an organic light emitting diode OLED, in which a layer of an organic resin or of a mineral material having a first nanostructuration is prepared by nano-imprint; the organic resin or mineral material is heated to a temperature equal to or higher than its glass transition temperature Tg or its melting point, and the organic resin or the mineral material is maintained at this temperature for a time tR called annealing time, whereby the organic resin or the mineral material flows and the first nanostructuration of the layer of organic resin or of mineral material is modified to produce a second nanostructuration; the organic resin or the mineral material is cooled.