Abstract:
An integrated photoacoustic transducer, sensing system and method for assisting in sensing a concentration of a species in a fluid such that the integrated photoacoustic transducer includes a waveguide structure. The waveguide structure has an optical resonance spectrally overlapping a spectral absorption line or band of the species. The photoacoustic transducer includes at least one acoustic cavity formed in a portion of the waveguide structure and configured for receiving the fluid for sensing comprising the species. The at least one acoustic cavity has an acoustic resonance spectrally overlapping with a harmonic of a modulation frequency. At least one acoustic transducer comprising a deformable mechanical portion is included in the photoacoustic transducer. The deformable mechanical portion is in direct acoustic communication with the at least one acoustic cavity and has an adjustable mechanical resonance, which can be brought into spectral overlap with an acoustic resonance of the least one acoustic cavity.
Abstract:
A micromechanical sensor includes a movable micromechanical element and an optical resonator of disk or ring type, wherein the optical resonator has at least one interruption; and in that the movable micromechanical element is mechanically coupled to the optical resonator in such a way that a movement of the movable micromechanical element induces a modification of the width of the interruption of the optical resonator by moving at least one edge of the interruption in a direction substantially parallel to a direction of propagation of the light in the resonator at the interruption.
Abstract:
Capteur micromécanique comprenant un élément micromécanique mobile (EMM) et un résonateur optique (ROP4) de type disque ou anneau, caractérisée en ce que - le résonateur optique présente au moins une interruption (GR1, GR2); et en ce que - l'élément micromécanique mobile est couplé mécaniquement au résonateur optique de telle façon qu'un mouvement de l'élément micromécanique mobile induit une modification de la largeur de l'interruption dudit résonateur optique en déplaçant au moins un bord de cette dernière dans une direction sensiblement parallèle à une direction de propagation de la lumière dans le résonateur en correspondance de l'interruption.
Abstract:
Sonde pour microscopie à force atomique comprenant une pointe pour microscopie à force atomique (PT1) orientée dans une direction dite longitudinale (y) et faisant saillie d'un bord (B) d'un substrat (S1) dans ladite direction longitudinale, caractérisée en ce que ladite pointe est agencée à une extrémité d'une navette (PJ1) fixée audit substrat au moins par l'intermédiaire d'une première (ET) et d'une deuxième (R, RA) structure, dites de support, au moins ladite première structure de support étant une structure flexible, s'étendant dans une direction dite transversale (x), perpendiculaire à la dite direction longitudinale et ancrée au substrat par au moins une liaison mécanique dans ladite direction transversale, lesdites structures de support étant adaptées pour permettre à la navette de se déplacer dans la direction longitudinale. Microscope à force atomique comprenant au moins une telle sonde.
Abstract:
A probe for atomic force microscopy comprises a tip for atomic force microscopy oriented in a longitudinal direction, wherein: the tip is arranged at one end of a sensitive part of the probe, which is movable or deformable and linked to a support structure, which is anchored to the main surface of the substrate; the sensitive portion and the support structure are planar elements, extending mainly in planes that are parallel to the main surface of the substrate; the sensitive portion is linked to the support structure via at least one element allowing the sensitive portion to be displaced or to be extended in this direction; and the tip, the sensitive part and the support structure protrude from an edge of the substrate in the longitudinal direction. An atomic force microscope comprising at least one such probe is also provided.
Abstract:
A microelectromechanical device comprising a mechanical structure extending along a longitudinal direction, linked to a planar substrate by an anchorage situated at one of its ends and able to flex in a plane parallel to the substrate, the mechanical structure comprises a joining portion, which links it to each anchorage and includes a resistive region exhibiting a first and second zone for injecting an electric current to form a resistive transducer, the resistive region extending in the longitudinal direction from an anchorage and arranged so a flexion of the mechanical structure in the plane parallel to the substrate induces a non-zero average strain in the resistive region and vice versa; wherein: the first injection zone is carried by the anchorage; and the second injection zone is carried by a conducting element not fixed to the substrate and extending in a direction, termed lateral, substantially perpendicular to the longitudinal direction.
Abstract:
A detection device to be inserted in a holder of a scanning probe microscope is provided. The detection device comprises a probe comprising a support, a lever extending from the support, a tip positioned at one end of the lever, opposite from said support. The probe has dimensions that are small in comparison with the holder and the detection device comprises an adapter secured to the probe so as to adapt said probe to fit the holder. The adapter is secured to the probe by bonding comprising at least one adhesive or by assembly comprising a filler material used to secure said adapter to said probe during a brazing operation.