An electronic device comprising a heat transfer structure and a phase change structure which is convertible between two phase states by heating, wherein the phase change structure is electrically conductive in at least one of the two phase states, wherein the heat transfer structure is arranged to be heated by radiation impinging on the heat transfer structure, wherein the phase change structure is thermally coupled to the heat transfer structure so that the phase change structure is convertible between the two phase states when the radiation impinges on the heat transfer structure.