LOW BAND BROADBAND FLUORESCENCE ENHANCING DEVICE AND BIOLOGICAL OR CHEMICAL OPTICAL SENSOR USING THE SAME

摘要

The invention concerns a device for enhancing fluorescence comprising a support (10) supporting fluorescence enhancing means (11), the fluorescence enhancing means providing a surface for receiving chemical or biological elements to be read by detection of a fluorescence signal emitted by a fluorophore, associated with the chemical or biological elements, under the effect of an excitation light beam. The fluorescence enhancing means (11) consist of a thin transparent dielectric layer or a stack of thin transparent dielectric layers (12 to 16) ensuring a mirror function for the fluorescence signals and for the excitation light beam, the material of the thin layer or of each thin layer of the stack being selected among the following materials: TiO2, Ta2O5, HfO2, ZrO2, MgO, SiO2, Si3N4, MgF2, YF3. The invention is applicable to a biological or chemical optical sensor.