An optoelectronic device comprising a photoconductor and an emitter which are electrically interconnected, the photoconductor being made from low-resistance semiconductor material with high-resistance inclusions forming n.sup.+n or p.sup.+p junctions at their boundaries in accordance with the type of conductivity of said semiconductor material, which ensures the generation of infralow-frequency electric oscillations.
An optical function semiconductor device formed by opto-electrical loop coupling of a light emitting diode and a photodetector, the latter of which receives a part of an output light of the former controlled by an output current thereof, can be readily miniaturized and integrated as a fundamental function active device self-containing a light source and presenting various useful novel functions of the optoelectronic technology between the external input and the output lights.
