Abstract: An indirect band gap light emitting device comprises a first body of non-monocrystalline indirect band gap semiconductor material. In this first body, two regions are formed: a first region with a first doping kind and a first doping concentration and a second region with a second doping kind and a second doping concentration. A junction is formed between the first region and the second region with a terminal arrangement connected to the first body and arranged to reverse bias the junction so as to emit light. The first body is formed from a deposited layer of semiconductor to form an integral part of a substrate. An integrated circuit can include the light emitting device and a second body of monocrystalline indirect band gap semiconductor material. A third body may separate and galvanically isolate the first and second bodies from each other.

Abstract: An integrated circuit (IC) having an on-chip electroluminescent silicon light source arrangement is disclosed. In the IC, the light source arrangement is a two-dimensional display arrangement and the IC includes an on-chip modulator operable to modulate data indicative of a state of the IC which can be displayed by the display arrangement, thereby providing an optical representation of the state of the IC.

Abstract: A programmable integrated circuit (IC) comprising a single body of semiconductor is disclosed. The IC comprises at least one optical transducer as an integral part of the programmable integrated circuit on the same body of semiconductor, the optical transducer being operable to receive an optical input indicative of programming instructions and at least one storage element communicatively coupled to the optical transducer and being operable to store thereon the programming instructions or an adaptation thereof. The programming instructions received via the optical input are configured to direct the operation of the IC.

Abstract: A programmable integrated circuit (IC) comprising a single body of semiconductor is disclosed. The IC comprises at least one optical transducer as an integral part of the programmable integrated circuit on the same body of semiconductor, the optical transducer being operable to receive an optical input indicative of programming instructions and at least one storage element communicatively coupled to the optical transducer and being operable to store thereon the programming instructions or an adaptation thereof. The programming instructions received via the optical input are configured to direct the operation of the IC.