Deep-Ultraviolet LEDs Incorporated with SiO2-Based Microcavities Toward High-Speed Ultraviolet Light Communication
Memon, Muhammad Hunain
Ooi, Boon S.
KAUST DepartmentPhotonics Laboratory, Computer, Electrical, and Mathematical Sciences and Engineering (CEMSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 21534 Saudi Arabia
Electrical and Computer Engineering Program
Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
Embargo End Date2023-09-16
Permanent link to this recordhttp://hdl.handle.net/10754/681561
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AbstractOptical wireless communication (OWC) in the deep-ultraviolet (DUV) band requires an efficient DUV light source with large bandwidth characteristics. In this work, a feasible approach is reported to enlarge the light output power as well as the bandwidth of a DUV light-emitting diode (LED) by embedding a SiO2-based microcavity on which an aluminum (Al) reflector is simultaneously deposited. Consequently, on the one hand, the microcavity with the Al-reflector can facilitate photon escape from the LED to increase the light extraction efficiency, thus enhancing the light output power of the devices. On the other hand, the LED incorporated with a microcavity structure exhibits a reduced resistance–capacitance time constant, leading to an increase in the modulation bandwidth of the LED. Strikingly, the DUV LED incorporated with microcavities represents a significant enhancement of light output power by nearly 30% at 80 mA while exhibiting a higher modulation bandwidth of 12% in comparison to the conventional LED without microcavities. Thus, the implementation of the microcavity and Al reflector on top of a classic LED can enlarge the light output power and modulation bandwidth, eventually facilitating to establish viable high-speed OWC systems.
CitationYu, H., Memon, M. H., Jia, H., Ding, Y., Xiao, S., Liu, X., Kang, Y., Wang, D., Zhang, H., Fang, S., Gong, C., Xu, Z., Ooi, B. S., & Sun, H. (2022). Deep-Ultraviolet LEDs Incorporated with SiO 2 -Based Microcavities Toward High-Speed Ultraviolet Light Communication. Advanced Optical Materials, 2201738. Portico. https://doi.org/10.1002/adom.202201738
SponsorsH.Y. and M.M contributed equally to this work. This work was funded by the National Natural Science Foundation of China (Grant No. 52161145404, 61905236, and 51961145110), and the Fundamental Research Funds for the Central Universities (Grant No. WK3500000009, WK5290000003, and WK2100230020), and was partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication. The authors would like to thank the Information Science Center of USTC for the hardware/software services.
JournalAdvanced Optical Materials