Abstract: The invention relates to an optical device for detecting and quantifying volatile compounds, comprising: a sensitive reflective element (21), the reflection rate of which varies as a function of the ethanol content contained in an atmosphere to be tested, the sensitive reflective element (21) comprising: a substrate (27), a sensitive layer (29) comprising microporous hydrophobic sol-gel silica, a light source (23) arranged to illuminate the sensitive layer (29) under an incident angle, a light detector (25) for measuring the intensity reflected by the reflective element (21) under an angle of detection, and a processing and calculation unit (31) configured to deduce from the intensity reflected by the reflective element (11) a parameter corresponding to a blood alcohol content.

Abstract: In the field of photonic and opto-electronic components, an optical filter comprises a plurality of semi-conducting nano-/microparticles, exhibiting properties of electromagnetic resonance in the optical and near-infrared domain, arranged on a plane, characterized in that it furthermore comprises a layer with electrically adjustable optical index disposed on the surface formed by said nano-/microparticles and said plane; a first electrically insulating layer disposed on said layer with electrically adjustable optical index and an electrode disposed on said first electrically insulating layer.

Abstract: In the field of photonic and opto-electronic components, an optical filter comprises a plurality of semi-conducting nano-/microparticles, exhibiting properties of electromagnetic resonance in the optical and near-infrared domain, arranged on a plane, characterized in that it furthermore comprises a layer with electrically adjustable optical index disposed on the surface formed by said nano-/microparticles and said plane; a first electrically insulating layer disposed on said layer with electrically adjustable optical index and an electrode disposed on said first electrically insulating layer.