Double photodiode electromagnetic radiation sensor device

An electromagnetic radiation detection system, comprising:

• a sensor device to convert an incident electromagnetic radiation (EMR) into electrical current as a function of a respective spectral responsivity dependent on an adjusting electrical voltage (VB), the sensor device being a double photodiode electromagnetic radiation sensor device comprising:
• a substrate within a first semiconductor material defining a first face exposed to electromagnetic radiation (EMR) and a second face opposite the first face;
• a first integrated photodiode (PD1) comprising:
• a first doped region included in the substrate extending to the second face and having a first type doping (n);
• and
• a second doped region included in the substrate extending to the second face, separated from the first doped region by a portion of the substrate, the second doped region having a doping of a second type (p+);
• a second integrated photodiode (PD2) comprising the first doped region, and further comprising:
• a layer in a second semiconductor material placed on the second face in contact with the first doped region and such as to define a third face opposed to the second face;
• and
• a doped layer in the second semiconductor material having a doping of the second type (p+) and overlapping the third face;
• a plurality of metal contacts (BC, TC) arranged to contact the second doped region, at the second face, and the doped layer;
• and
• an electronic control and processing module;
• wherein the electronic control and processing module selectively provides the sensor device with a plurality of adjusting electrical voltage values (VB) adjusting the spectral responsivity so as to obtain a corresponding plurality of detected electric currents (Iph) associated with the incident electromagnetic radiation;
• and
• wherein the electronic control and processing module processes values of such detected electric currents (Iph) basing on the adjusting electrical voltage values (VB) and the spectral responsivity, obtaining information (SP-ANS;
• IPST-IM) related to the incident electromagnetic radiation.