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
(SET1) is supposed to read the charge whereas the detection bloc is
represented by the second SET (SET2). In the second part, we
investigate the effects of photoexcitation on Id-Vg curves and we
present results obtained on the output photo-SET characteristics after
variation of power illumination and response time.