• Photonics Research
  • Vol. 9, Issue 7, 1213 (2021)
Rongqiao Wan1, Guoqiang Li2, Xiang Gao1, Zhiqiang Liu3、4, Junhui Li1, Xiaoyan Yi3、4、5、*, Nan Chi2、6、*, and Liancheng Wang1、7、*
Author Affiliations
  • 1State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
  • 2Department of Communication Science and Engineering, Key Laboratory for Information Science of Electromagnetic Waves (MoE), Fudan University, Shanghai 200433, China
  • 3Semiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 4College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 101408, China
  • 5e-mail: spring@semi.ac.cn
  • 6e-mail: nanchi@fudan.edu.cn
  • 7e-mail: liancheng_wang@csu.edu.cn
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    DOI: 10.1364/PRJ.421366 Cite this Article Set citation alerts
    Rongqiao Wan, Guoqiang Li, Xiang Gao, Zhiqiang Liu, Junhui Li, Xiaoyan Yi, Nan Chi, Liancheng Wang. Nanohole array structured GaN-based white LEDs with improved modulation bandwidth via plasmon resonance and non-radiative energy transfer[J]. Photonics Research, 2021, 9(7): 1213 Copy Citation Text show less

    Abstract

    Commercial white LEDs (WLEDs) are generally limited in modulation bandwidth due to a slow Stokes process, long lifetime of phosphors, and the quantum-confined Stark effect. Here we report what we believe is a novel plasmonic WLED by infiltrating a nanohole LED (H-LED) with quantum dots (QDs) and Ag nanoparticles (NPs) together (M-LED). This decreased distance between quantum wells and QDs would open an extra non-radiative energy transfer channel and thus enhance Stokes transfer efficiency. The presence of Ag NPs enhances the spontaneous emission rate significantly. Compared to an H-LED filled with QDs (QD-LED), the optimized M-LED demonstrates a maximum color rendering index of 91.2, a 43% increase in optical power at 60 mA, and a lowered correlated color temperature. Simultaneously, the M-LED exhibits a data rate of 2.21 Gb/s at low current density of 96 A/cm2 (60 mA), which is 77% higher than that of a QD-LED. This is mainly due to the higher optical power and modulation bandwidth of the M-LED under the influence of plasmon, resulting in a higher data rate and higher signal-to-noise ratio under the forward error correction. We believe the approach reported in this work should contribute to a WLED light source with increased modulation bandwidth for a higher speed visible light communication application.
    I(t)=A1et/τ1+A2et/τ2,

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    Rongqiao Wan, Guoqiang Li, Xiang Gao, Zhiqiang Liu, Junhui Li, Xiaoyan Yi, Nan Chi, Liancheng Wang. Nanohole array structured GaN-based white LEDs with improved modulation bandwidth via plasmon resonance and non-radiative energy transfer[J]. Photonics Research, 2021, 9(7): 1213
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