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Localized Surface Plasmon-Enhanced Deep-UV Light-Emitting Diodes with Al/Al2O3 Asymmetrical Nanoparticles

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Abstract

In this work, light-extraction enhancement induced by localized surface plasmons (LSPs) on asymmetrical design of metallic nanoparticles (NPs) for AlGaN deep-ultraviolet (UV) light-emitting diodes (LEDs) is investigated numerically. The systems under study consist of Al NPs with varying diameter separated by a nano-gap, and the symmetrical dimer NPs with different geometrical parameters are studied for reference. We have demonstrated that tunable plasmonic NPs and spectral response can be controlled by varying the size of the nanoparticles and nano-gaps. It is found that the enhancement of the electric field and the peak position are subject to geometrical characteristics of the NP components in different manners for symmetrical and asymmetrical systems, respectively. High enhancement ratio for UV wavelength can be obtained by tuning parameters of asymmetrical system, which is potential for improving the performance of deep-UV LEDs.

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Acknowledgments

This work is supported by the China Postdoctoral Science Foundation (Nos. 2014M561623, 2014M551559), National Natural Science Foundation of Special Theoretical Physics (No. 11547168), and Natural Science Foundation of Jiangsu Province (Nos. BK20150158, BM2014402), Jiangsu Planned Projects for Postdoctoral Research Funds (No. 1401013B), the Fundamental Research Funds for Central Universities (Nos. JUSRP51628B, JUSRP51517), Anhui Provincial Natural Science Foundation (No. 1508085MF135), and Undergraduate Training Programs for Innovation of Jiangnan University (No. 2015309Y).

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Authors and Affiliations

  1. School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi, 214122, China

    Jin Wang, Guofeng Yang, Qing Zhang & Shumei Gao

  2. School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China

    Guofeng Yang, Rong Zhang & Youdou Zheng

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  1. Jin Wang
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  2. Guofeng Yang
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  3. Qing Zhang
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  4. Shumei Gao
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  5. Rong Zhang
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  6. Youdou Zheng
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Correspondence to Guofeng Yang or Shumei Gao.

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Wang, J., Yang, G., Zhang, Q. et al. Localized Surface Plasmon-Enhanced Deep-UV Light-Emitting Diodes with Al/Al2O3 Asymmetrical Nanoparticles. Plasmonics 12, 843–848 (2017). https://doi.org/10.1007/s11468-016-0333-z

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  • DOI: https://doi.org/10.1007/s11468-016-0333-z

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