Wang Linning, Li Xin, Gao Xumin, Jia Bolun, Guan Qi, Ye ZiQi, Fu Kang, Jin Ruixue, Wang Yongjin
Opt Lett. 2021 Jan 15;46(2):376-379. doi: 10.1364/OL.415007.
Multiple-quantum well (MQW) III-nitride diodes can both emit and detect light. In particular, a III-nitride diode can absorb shorter-wavelength photons generated from another III-nitride diode that shares an identical MQW structure because of the spectral overlap between the emission and detection spectra of the III-nitride diode, which establishes a wireless visible light communication system using two identical III-nitride diodes. Moreover, a wireless light communication system using a modulating retro-reflector (MRR) enables asymmetric optical links, which forms a two-way optical link using a single transmitter and receiver. Here, in association with an MRR, we propose, fabricate, and characterize asymmetric optical links using monolithic III-nitride diodes, where one III-nitride diode functions as a transmitter to emit light, an MRR reflects light with the encoded information, another monolithically integrated III-nitride diode serves as a receiver to absorb the reflected light to convert optical signals into electrical ones, and the encoded information is finally decoded. Advanced monolithic III-nitride asymmetric optical links can be developed toward Internet of Things (IoT) deployment based on such multifunction devices.
多量子阱（MQW）III族氮化物二极管既能发光又能探测光。特别是，由于III族氮化物二极管的发射光谱和探测光谱之间存在光谱重叠，一个III族氮化物二极管可以吸收由另一个具有相同MQW结构的III族氮化物二极管产生的较短波长光子，这就建立了一个使用两个相同III族氮化物二极管的无线可见光通信系统。此外, 使用调制后向反射器（MRR）的无线光通信系统能够实现非对称光链路，该系统使用单个发射器和接收器形成双向光链路。在此，结合MRR，我们提出、制造并表征了使用单片III族氮化物二极管的非对称光链路，其中一个III族氮化物二极管用作发射器发光，MRR反射带有编码信息的光，另一个单片集成的III族氮化物二极管用作接收器吸收反射光以将光信号转换为电信号，最后对编码信息进行解码。基于此类多功能器件，可以朝着物联网（IoT）部署方向开发先进的单片III族氮化物非对称光链路。
