Concept of new photodetector based on single electron transistor for single charge detection

In this paper, we present a model proposition of photo-SET (single electron photo-detector) aiming at detecting one by one electrons. In the first part of this work, we present the two blocs of the proposed photo-SET (reading and detection blocs). The device structure presented is consisting of two SETs capacitively coupled. In this model, the first SET (SET 1 ) is supposed to read the charge whereas the detection bloc is represented by the second SET (SET 2 ). In the second part, we investigate the effects of photoexcitation on I d - V g curves and we present results obtained on the output photo-SET characteristics after variation of power illumination and response time.