Photoacoustic detecting device

US12216042B2 · kind B2 · utility

Assignees

• ECLYPIA · FR
• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Rolf Aidam · Endingen am Kaiserstuhl, DE
• Sebastien Barnola · Meylan, FR
• Badhise Ben Bakir · Brézins, FR
• Jean-Guillaume COUTARD · Meylan, FR
• Kévin JOURDE · Grenoble, FR

Key dates

• Filing date: Apr 19, 2024
• Grant date: Feb 4, 2025
• Expiry date: Apr 19, 2044

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/0633
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A photoacoustic detecting device comprises a housing which houses: a lighting module, a photoacoustic cell, comprising an surface contact intended to be placed in contact with the medium to analyse, a photoacoustic cavity extending from the surface contact to a top of the photoacoustic cell, at least one window closing the top of the photoacoustic cell or the contact surface of the photoacoustic cell, at least one subwavelength pattern located on a surface of said window, said subwavelength pattern being configured to focus the light beam on an surface of interest of the medium to analyse, a sensor, linked to the cavity, the sensor being configured to detect a generated signal, said generated signal being generated in the photoacoustic cavity by a photothermic effect in the medium, and wherein the photoacoustic cell, the window and the subwavelength pattern are formed on a single silicon wafer.