Biosensor with an arbitrary substrate that can be characterised in photothermal deflection

摘要

The invention relates to a sample support designed to support a sample which is to be detected and/or analysed by a photothermal detection method using an irradiation pump beam irradiating the sample and a detection and/or analysis probe beam. It comprises a substrate supporting a stack of thin dielectric layers forming a Bragg mirror on which the sample will be supported, the stack of thin dielectric layers being used to reflect the pump beam that reaches it. The invention also relates to a device for detection and/or analysis of a sample by a photothermal method, the said device comprising a sample support according to the invention, a means of lighting the sample supported by the said support and supplying a pump beam, a means of detection and/or measurement of the absorption or reflection of the pump beam by the sample when it is illuminated by the said illumination means. Finally, the invention relates to a particular application of the said device.