Patent ID: 7629663

Claim:
MSM type photo-detection device designed to detect incident light and comprising: a support; reflecting means superposed on a first face of the support to form a first mirror for a Fabry-Pérot type resonant cavity; a layer of material that does not absorb the incident light, the layer of material being disposed on the reflecting means, an active layer made of a semiconducting material absorbing incident light, the active layer being disposed on the layer of material that does not absorb the incident light, and a network of polarization electrodes collecting the detected signal, the electrodes network being arranged on the active layer, and composed of parallel conducting strips at a uniform spacing at a period less than the wavelength of incident light, wherein the light to be detected is incident onto the device through the electrodes network, the geometric dimensions of the conducting strips being determined to form a second mirror for the Fabry-Pérot type resonant cavity at the interface between the electrodes network and the active layer, the distance separating the first mirror from the second mirror being determined to obtain a Fabry-Pérot type resonance for incident light between these two mirrors.