Integrated Sensing and Communication Chip Based on III-Nitride for Motion Detection

Integrated Sensing and Communication (ISAC) involves incorporating wireless sensing capabilities into communication systems. The integration of ISAC affords improvements in the performance of the communication system, as well as the ability to perform high-precision motion detection, positioning, imaging, and other related functions. Therefore, it is highly valuable to develop an ISAC terminal device that has a high degree of integration and energy efficiency. Here, we propose an ISAC chip that utilizes the coexistence of luminescence and detection properties of III-nitride multiple quantum wells for motion detection and visible light communication. The ISAC chip includes both a transmitter and a receiver of visible light and is fabricated on a sapphire wafer with InGaN/GaN multiple quantum wells. A rotating mirror is used as the object for motion detection and modulates the light signal emitted by the transmitter in a reflected light path. The variation period of the photocurrent curve generated by the modulated light signal is consistent with the rotation period of the mirror. We also investigate the performance of this chip as a transmitter and transceiver terminal of visible light communication systems. The results of the study provide a promising approach for the integration of motion sensing and visible light communication.