Abstract: A sensor for photoacoustic spectroscopy including a support and a mechanical resonator fastened to the support, including at least one sensor element designed to be vibrated by an acoustic wave, and at least one first capacitive electrode mechanically coupled to the sensor element so as to be moved by the sensor element when it is vibrated; and at least one second capacitive electrode forming with the at least one first electrode, a capacitive sensor; the support facing the sensor element, an apertured part formed by one or more through-openings. Also provided is a detection and/or measurement device and method, for photoacoustic spectroscopy, using such a sensor.

Abstract: A sensor for photoacoustic spectroscopy including a support and a mechanical resonator fastened to the support, including at least one sensor element designed to be vibrated by an acoustic wave, and at least one first capacitive electrode mechanically coupled to the sensor element so as to be moved by the sensor element when it is vibrated; and at least one second capacitive electrode forming with the at least one first electrode, a capacitive sensor; the support facing the sensor element, an apertured part formed by one or more through-openings. Also provided is a detection and/or measurement device and method, for photoacoustic spectroscopy, using such a sensor.

Abstract: The device (10) comprises a cylindrical resonator (R) vibrating in extension-compression along its longitudinal axis (?) and having a vibration node (N) in its mid-plane (?), the vibration naturally generating radial extension/compression deformations, and a mechanical decoupling module comprising a hollow cylinder (2) surrounding the resonator and a membrane (1) positioned in the aforementioned mid-plane and rigidly connected to the cylindrical surface of the resonator and to the internal cylindrical surface of the hollow cylinder. The hollow cylinder vibrates in extension/compression in antiphase with the vibration of the resonator, enabling the effects of the radial deformations of the hollow cylinder and of the resonator to compensate each other in an area (ZF) located on the external surface of the hollow cylinder close to the mid-plane.

Abstract: The device (10) comprises a cylindrical resonator (R) vibrating in extension-compression along its longitudinal axis (?) and having a vibration node (N) in its mid-plane (?), the vibration naturally generating radial extension/compression deformations, and a mechanical decoupling module comprising a hollow cylinder (2) surrounding the resonator and a membrane (1) positioned in the aforementioned mid-plane and rigidly connected to the cylindrical surface of the resonator and to the internal cylindrical surface of the hollow cylinder. The hollow cylinder vibrates in extension/compression in antiphase with the vibration of the resonator, enabling the effects of the radial deformations of the hollow cylinder and of the resonator to compensate each other in an area (ZF) located on the external surface of the hollow cylinder close to the mid-plane.