Si-substrate LEDs with multiple superlattice interlayers for beyond 24 Gbps visible light communication

可见光通信 发光二极管 光电子学 材料科学 基质(水族馆) 可见光谱 光学 二极管 计算机科学 物理 海洋学 地质学
作者
Fangchen Hu,Shouqing Chen,Guoqiang Li,Peng Zou,Junwen Zhang,Jian Hu,Jianli Zhang,Zhixue He,Shaohua Yu,Fengyi Jiang
出处
期刊:Photonics Research [Optica Publishing Group]
卷期号:9 (8): 1581-1581 被引量:37
标识
DOI:10.1364/prj.424934
摘要

High-speed visible light communication (VLC) using light-emitting diodes (LEDs) is a potential complementary technology for beyond-5G wireless communication networks. The speed of VLC systems significantly depends on the quality of LEDs, and thus various novel LEDs with enhanced VLC performance increasingly emerge. Among them, InGaN/GaN-based LEDs on a Si-substrate are a promising LED transmitter that has enabled VLC data rates beyond 10 Gbps. The optimization on the period number of superlattice interlayer (SL), which is a stress-relief epitaxial layer in a Si-substrate LED, has been demonstrated to be an effective method to improve Si-substrate LED’s luminescence properties. However, this method to improve LED’s VLC properties is barely investigated. Hence, we for the first time experimentally studied the impact of SL period number on VLC performance. Accordingly, we designed and fabricated an integrated 4 × 4 multichromatic Si-substrate wavelength-division-multiplexing LED array chip with optimal SL period number. This chip allows up to 24.25 Gbps/1.2 m VLC transmission using eight wavelengths, which is the highest VLC data rate for an InGaN/GaN LED-based VLC system to the best of our knowledge. Additionally, a record-breaking data rate of 2.02 Gbps over a 20-m VLC link is achieved using a blue Si-substrate LED with the optimal SL period number. These results validate the effectiveness of Si-substrate LEDs for both high-speed and long-distance VLC and pave the way for Si-substrate LED design specially for high-speed VLC applications.
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