TY - JOUR
T1 - Deep-Ultraviolet LEDs Incorporated with SiO2-Based Microcavities Toward High-Speed Ultraviolet Light Communication
AU - Yu, Huabin
AU - Memon, Muhammad Hunain
AU - Jia, Hongfeng
AU - Ding, Yifan
AU - Xiao, Shudan
AU - Liu, Xin
AU - Kang, Yang
AU - Wang, Danhao
AU - Zhang, Haochen
AU - Fang, Shi
AU - Gong, Chen
AU - Xu, Zhengyuan
AU - Ooi, Boon S.
AU - Sun, Haiding
N1 - KAUST Repository Item: Exported on 2022-09-19
Acknowledgements: H.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.
PY - 2022/9/16
Y1 - 2022/9/16
N2 - Optical 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.
AB - Optical 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.
UR - http://hdl.handle.net/10754/681561
UR - https://onlinelibrary.wiley.com/doi/10.1002/adom.202201738
U2 - 10.1002/adom.202201738
DO - 10.1002/adom.202201738
M3 - Article
SN - 2195-1071
SP - 2201738
JO - Advanced Optical Materials
JF - Advanced Optical Materials
ER -