Abstract: A concentration sensor for at least one biological species in the blood includes a support, at least one waveguide, and an optomechanical resonator suspended from the support. The optomechanical resonator is optically coupled to the waveguide, and the optomechanical resonator is configured to vibrate in volume mode and includes at least one face extending in the plane of the sensor and configured to receive molecules of the given species. At least the face includes a functionalisation layer specific to the species, the optomechanical resonator having a smaller dimension in a direction normal to the plane of the sensor compared with the dimensions of the said face.

Abstract: An electro-optical conversion system including an opto-mechanical conversion device which includes a ring cavity formed by an optical waveguide which extends along an annular closed curve, a micromechanical resonator that comprises at least one microbeam, and a zipper type element integrated into the ring cavity, the zipper type element including a first arm made on a portion of the ring waveguide and a second arm made on the microbeam. The conversion system also includes a capacitor with first and second electrodes separated by a gap which varies when the microbeam oscillates.

Abstract: A detector for terahertz electromagnetic waves includes a terahertz optomechanical transducer to transform an incident electromagnetic wave, having a terahertz frequency within a terahertz frequency band, into a measurable mechanical response; and a detection device for detecting an output signal. The terahertz optomechanical transducer includes a first element and an opposite element forming with the first element a capacitive gap.

Abstract: A detector for terahertz electromagnetic waves includes a terahertz optomechanical transducer to transform an incident electromagnetic wave, having a terahertz frequency within a terahertz frequency band, into a measurable mechanical response; and a detection device for detecting an output signal. The terahertz optomechanical transducer includes a first element and an opposite element forming with the first element a capacitive gap.

Abstract: The invention concerns a method for tuning at a targeted resonance wavelength at least one micro and/or nanophotonic resonator, the resonator having dimensions defining resonance wavelength of said resonator, the resonator being immersed in a fluid containing ions so that the resonator is surrounded by said fluid, wherein the method comprises a step of injecting light, having a light wavelength equal to the resonance wavelength, into the resonator, so that the injected light resonates within the resonator and triggers a photo-electrochemical etching process enabled by the surrounding fluid containing ions, said etching process being enhanced by the optical resonance which amplifies light intensity in the photonic resonator, the etching decreasing dimensions of the photonic resonator, hereby lowering and tuning the resonance wavelength of the photonic resonator.

Abstract: The invention concerns a method for tuning at a targeted resonance wavelength at least one micro and/or nanophotonic resonator, the resonator having dimensions defining resonance wavelength of said resonator, the resonator being immersed in a fluid containing ions so that the resonator is surrounded by said fluid, wherein the method comprises a step of injecting light, having a light wavelength equal to the resonance wavelength, into the resonator, so that the injected light resonates within the resonator and triggers a photo-electrochemical etching process enabled by the surrounding fluid containing ions, said etching process being enhanced by the optical resonance which amplifies light intensity in the photonic resonator, the etching decreasing dimensions of the photonic resonator, hereby lowering and tuning the resonance wavelength of the photonic resonator.