An integrated device of GaN-based micro-LED and detector was developed for multifunctional applications in visible light communication (VLC). The size of the current spreading layer was used to define the micro-LED size for high-bandwidth transmitter. The device can also be used as high-sensitivity photodetector (PD). In this scenario, the light receiving area is not restricted by the size of the current spreading layer. The size-dependent characteristics of the PD have been investigated in detail. Such integrated devices can be used as both micro-LED and PD for duplex high-speed VLC. Besides, we demonstrated the functions of solid-state lighting and VLC when the device was integrated with broad-area LED, as well as the potential application in micro-LED display combining with VLC.

开发了一种基于 GaN 的微型 LED 和探测器的集成器件，用于可见光通信 (VLC) 中的多功能应用。电流扩展层的尺寸用于定义高带宽发射器的微型 LED 尺寸。该器件还可用作高灵敏度光电探测器 (PD)。在这种情况下，光接收区域不受电流扩散层大小的限制。已经详细研究了 PD 的大小相关特性。此类集成器件可用作双工高速 VLC 的微型 LED 和 PD。此外，我们展示了该设备与大面积LED集成时固态照明和VLC的功能，以及与VLC结合在micro-LED显示中的潜在应用。