Abstract: A spectral filter is manufactured using a process wherein a first rectangular bar is formed within a first layer made of a first material, said first rectangular bar being made of a second material having a different optical index. The process further includes, in a second layer over the first layer, a second rectangular bar made of the second material. The second rectangular bar is positioned in contact with the first rectangular bar. The second layer is also made of the first material.

Abstract: The invention describes a device allowing the observation of a sample, comprising particles, for example biological particles, by lensless imaging. The sample is disposed against a substrate, the substrate being interposed between a light source and an image sensor. The substrate comprises at least one thin film, extending across a thin film plane, structured so as to form a diffraction grating, designed to confine a part of a light wave emitted by the light source, in a plane parallel to said thin film plane. The device does not comprise magnification optics between the substrate and the image sensor.

Abstract: An optical reflection focusing device, including a grating including an alternation of first and second regions having different refraction indexes, the grating including a plurality of sub-gratings, each including a plurality of first regions aligned along a plane parallel to the mean plane of the grating, said device including structures such that, for a collimated incident coherent light beam orthogonal to the mean plane of the grating, the rays of the beam reach with a non-zero phase shift different sub-gratings of the device.

Abstract: An optical coupler integrated on a substrate, that will optically couple a laser and a waveguide and including an external element, including two arms separated by a notch, this notch being delimited laterally by two first walls at a spacing that reduces towards the bottom of the notch; a central element, located in the notch delimited laterally by two second walls and with a first region in which the two second walls are in direct contact with two first walls as far as the bottom of the notch; and an intermediate element, extending between the external element and the central element. The optical index of the central element is greater than the optical index of the intermediate element, itself greater than the optical index of the arms of the external element. Such an optical coupler provides efficient coupling between a laser emitting in the mid-infrared and a waveguide integrated on a substrate.

Abstract: A photodiode includes at least one central pad arranged on a light-receiving surface of a photodiode semiconductor substrate. The pad is made of a first material and includes lateral sidewalls surrounded by a spacer made of a second material having a different optical index than the first material. The lateral dimensions of the pad are smaller than an operating wavelength of the photodiode. Both the first and second materials are transparent to that operating wavelength. The pads and spacers are formed at a same time gate electrodes and sidewall spacers of MOS transistors are formed.

Abstract: The invention relates to an optical coupler (10) in a vertical configuration, comprising a first waveguide (12) and a second waveguide (14). The optical coupler (10) comprises a third waveguide (16) distinct from the first and second waveguides (12, 14) and extending parallel to the first and second waveguides (12, 14), the third waveguide (16) being arranged between the first waveguide (12) and the second waveguide (14) in a transverse direction (X) perpendicular to the longitudinal direction (Z) and having parameters influencing the evanescent wave coupling between the first waveguide (12) and the second waveguide (14), those parameters being chosen such that the coupling (C) is greater than 15%.

Abstract: An array bolometric detector for detecting an electromagnetic radiation in a predetermined infrared or terahertz wavelength range, including a substrate, and an array of bolometric microplates for the detection of the radiation, suspended above the substrate by support elements. The detector includes a membrane arranged above each microplate, and having patterns having a refractive index smaller than that of the membrane formed therein. The patterns are placed periodically along at least one axis of the membrane, according to a period shorter than or equal to ? n , where ? is a wavelength to be detected and n is the average refractive index of the medium separating the microplate from the membrane. The width of the patterns along the axis increases from a central location of the membrane towards the periphery thereof.

Abstract: An optical reflection focusing device, including a grating including an alternation of first and second regions having different refraction indexes, the grating including a plurality of sub-gratings, each including a plurality of first regions aligned along a plane parallel to the mean plane of the grating, said device including structures such that, for a collimated incident coherent light beam orthogonal to the mean plane of the grating, the rays of the beam reach with a non-zero phase shift different sub-gratings of the device.

Abstract: The invention relates to an optical coupler (10) in a vertical configuration, capable of working for a wavelength and comprising a first waveguide (12) and a second waveguide (14). The second waveguide (14) has a patterning (33) in the form of a series of patterns (36), the patterns (36) extending along a transverse direction (X) perpendicular to the longitudinal direction (Z), being parallel to each other and orthogonal to the general direction of the first waveguide (12), each pattern (36) being arranged both in the core (30) and the cladding (32) of the second waveguide (14) and having parameters influencing the evanescent wave coupling between the first waveguide (12) and the second waveguide (14), said parameters being chosen such that the coupling (C) is greater than 15%.

Abstract: Microelectronic photoacoustic detection device comprising: a substrate comprising cavities forming a Helmholtz differential acoustic resonator; acoustic detectors coupled to the chambers of the resonator; a light source; a waveguide comprising a first end coupled to the light source and a second end coupled to a first chamber; in which the second end comprises, at the interface with the first chamber, a width greater than that of the first end and that of the given wavelength, and/or in which the device comprises a diffraction grating arranged in the second end and capable of diffracting a first part of the beam towards a lower reflective layer arranged under the second end and a second part of the beam towards an upper reflective layer arranged at an upper wall of the first chamber.

Abstract: A bolometric detector of LWIR wavelengths, including: a substrate; a membrane suspended above the substrate by supporting elements; an absorbing element comprising several MIM structures each formed with a lower metal element, an upper metal element specific to each MIM structure and with a dielectric element positioned between the lower and upper metal elements; a thermometric element comprising at least one thermometric material; wherein: the membrane includes the upper metal element, the thermometric material and one portion of the dielectric element of each MIM structure, the upper metal elements of at least two MIM structure have different dimensions relatively to each other in the main plane of the membrane, and the dielectric element of each of the MIM structures includes at least one of the following materials having vibrational modes in the LWIR range: Al2O3, AlN, TiO2.

Abstract: An optical coupler integrated on a substrate, that will optically couple a laser and a waveguide and including an external element, including two arms separated by a notch, this notch being delimited laterally by two first walls at a spacing that reduces towards the bottom of the notch; a central element, located in the notch delimited laterally by two second walls and with a first region in which the two second walls are in direct contact with two first walls as far as the bottom of the notch; and an intermediate element, extending between the external element and the central element. The optical index of the central element is greater than the optical index of the intermediate element, itself greater than the optical index of the arms of the external element. Such an optical coupler provides efficient coupling between a laser emitting in the mid-infrared and a waveguide integrated on a substrate.

Abstract: Spectral filtering device including a dielectric substrate, a first filter capable of acting as a passband filter in the visible range and having a plurality of first nanostructures with a uniform spacing between each other. Each nanostructure has a portion of dielectric material arranged between two portions of metallic material such that one of the two portions of metallic material is arranged between the substrate and the portion of dielectric material. A second filter capable of acting as a passband filter in the infrared range is also included having a plurality of second nanostructures with a uniform spacing between each other and each comprising a portion of dielectric material of which only one face is in contact with a portion of metallic material.

Abstract: A SPAD-type photodiode has a semiconductor substrate with a light-receiving surface. A lattice formed of interlaced strips made of a first material covers the light receiving surface. The lattice includes lattice openings with lateral walls covered by a spacer made of a second material. Then first and second materials have different optical indices, and further each optical index is less than or equal to the substrate optical index. A pitch of the lattice is of the order of a magnitude of an operating wavelength of the photodiode. The first and second materials are transparent at that operating wavelength. The lattice is made of a conductive material electrically coupled to an electrical connection node (for example, a bias voltage node).

Abstract: A photosensor, including: first and second photosensitive cells formed next to each other in a semiconductor substrate; first and second dielectric interface layers coating, respectively, the first and second cells; and a resonance grating formed in a third dielectric layer coating the first and second interface layers, wherein the first and second interface layers have different thicknesses, or different refraction indexes, or different thickness and refraction indexes.

Abstract: An integrated imaging device supports front face illumination with one or more photosensitive regions formed in a substrate. A lower dielectric region is provided over the substrate, the lower dielectric region having an upper face. A metal optical filter having a metal pattern is provided on the upper face (or extending into the lower dielectric region from the upper face). An upper dielectric region is provided on top of the lower dielectric region and metal optical filter. The lower dielectric region is at least part of a pre-metal dielectric layer, and the upper dielectric region is at least part of a metallization layer.

Abstract: Microelectronic photoacoustic detection device comprising: a substrate comprising cavities forming a Helmholtz differential acoustic resonator; acoustic detectors coupled to the chambers of the resonator; a light source; a waveguide comprising a first end coupled to the light source and a second end coupled to a first chamber; in which the second end comprises, at the interface with the first chamber, a width greater than that of the first end and that of the given wavelength, and/or in which the device comprises a diffraction grating arranged in the second end and capable of diffracting a first part of the beam towards a lower reflective layer arranged under the second end and a second part of the beam towards an upper reflective layer arranged at an upper wall of the first chamber.

Abstract: A bolometric detector including at least: a substrate; a membrane suspended above the substrate by support elements; an absorber element comprising at least one MIM structure formed by a lower metal element, an upper metal element and a dielectric element arranged between the lower metal element and the upper metal element; a thermometer element comprising at least one thermometric material; wherein the membrane includes at least the upper metal element of the MIM structure and the thermometric material, and wherein the thermometric material is part of the dielectric element of the MIM structure.

Abstract: An integrated imaging device supports front face illumination with one or more photosensitive regions formed in a substrate. A lower dielectric region is provided over the substrate, the lower dielectric region having an upper face. A metal optical filter having a metal pattern is provided on the upper face (or extending into the lower dielectric region from the upper face). An upper dielectric region is provided on top of the lower dielectric region and metal optical filter. The lower dielectric region is at least part of a pre-metal dielectric layer, and the upper dielectric region is at least part of a metallization layer.

Abstract: A photodiode includes at least one central pad arranged on a light-receiving surface of a photodiode semiconductor substrate. The pad is made of a first material and includes lateral sidewalls surrounded by a spacer made of a second material having a different optical index than the first material. The lateral dimensions of the pad are smaller than an operating wavelength of the photodiode. Both the first and second materials are transparent to that operating wavelength. The pads and spacers are formed at a same time gate electrodes and sidewall spacers of MOS transistors are formed.