Single-chip imaging system that simultaneously transmits light

Multiple-quantum-well diodes (MQW diodes) naturally have key functionalities of light emission, transmission, modulation and detection all at the same time, enabling new forms of information and energy conversion between photons and electrons. When approximately biased and illuminated at the same time, a multifunctional MQW diode allows simultaneous light emission and detection within a single diode. A single-chip imaging system that uses a 4 × 4 MQW diode array is experimentally demonstrated here that can simultaneously transmit light and capture an image, showing the great development potential of advanced monolithic III-nitride information systems.