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Giant photoluminescence enhancement in tungsten-diselenide–gold plasmonic hybrid structures

Author

Listed:
  • Zhuo Wang

    (NUS Graduate School for Integrative Sciences & Engineering (NGS), National University of Singapore
    National University of Singapore
    Imperial College London)

  • Zhaogang Dong

    (Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research))

  • Yinghong Gu

    (National University of Singapore)

  • Yung-Huang Chang

    (National Chiao Tung University)

  • Lei Zhang

    (National University of Singapore)

  • Lain-Jong Li

    (King Abdullah University of Science and Technology)

  • Weijie Zhao

    (National University of Singapore)

  • Goki Eda

    (National University of Singapore
    National University of Singapore
    Centre for Advanced 2D Materials, National University of Singapore)

  • Wenjing Zhang

    (National University of Singapore
    SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University)

  • Gustavo Grinblat

    (Imperial College London)

  • Stefan A. Maier

    (Imperial College London)

  • Joel K. W. Yang

    (Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research)
    Singapore University of Technology and Design)

  • Cheng-Wei Qiu

    (NUS Graduate School for Integrative Sciences & Engineering (NGS), National University of Singapore
    National University of Singapore)

  • Andrew T. S. Wee

    (NUS Graduate School for Integrative Sciences & Engineering (NGS), National University of Singapore
    National University of Singapore
    Centre for Advanced 2D Materials, National University of Singapore)

Abstract

Impressive properties arise from the atomically thin nature of transition metal dichalcogenide two-dimensional materials. However, being atomically thin limits their optical absorption or emission. Hence, enhancing their photoluminescence by plasmonic nanostructures is critical for integrating these materials in optoelectronic and photonic devices. Typical photoluminescence enhancement from transition metal dichalcogenides is 100-fold, with recent enhancement of 1,000-fold achieved by simultaneously enhancing absorption, emission and directionality of the system. By suspending WSe2 flakes onto sub-20-nm-wide trenches in gold substrate, we report a giant photoluminescence enhancement of ∼20,000-fold. It is attributed to an enhanced absorption of the pump laser due to the lateral gap plasmons confined in the trenches and the enhanced Purcell factor by the plasmonic nanostructure. This work demonstrates the feasibility of giant photoluminescence enhancement in WSe2 with judiciously designed plasmonic nanostructures and paves a way towards the implementation of plasmon-enhanced transition metal dichalcogenide photodetectors, sensors and emitters.

Suggested Citation

  • Zhuo Wang & Zhaogang Dong & Yinghong Gu & Yung-Huang Chang & Lei Zhang & Lain-Jong Li & Weijie Zhao & Goki Eda & Wenjing Zhang & Gustavo Grinblat & Stefan A. Maier & Joel K. W. Yang & Cheng-Wei Qiu & , 2016. "Giant photoluminescence enhancement in tungsten-diselenide–gold plasmonic hybrid structures," Nature Communications, Nature, vol. 7(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11283
    DOI: 10.1038/ncomms11283
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    Cited by:

    1. Fuhuan Shen & Zhenghe Zhang & Yaoqiang Zhou & Jingwen Ma & Kun Chen & Huanjun Chen & Shaojun Wang & Jianbin Xu & Zefeng Chen, 2022. "Transition metal dichalcogenide metaphotonic and self-coupled polaritonic platform grown by chemical vapor deposition," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Zehua Hu & Tanjung Krisnanda & Antonio Fieramosca & Jiaxin Zhao & Qianlu Sun & Yuzhong Chen & Haiyun Liu & Yuan Luo & Rui Su & Junyong Wang & Kenji Watanabe & Takashi Taniguchi & Goki Eda & Xiao Rensh, 2024. "Energy transfer driven brightening of MoS2 by ultrafast polariton relaxation in microcavity MoS2/hBN/WS2 heterostructures," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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