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<p>Dramatic fluorescence enhancement in two-dimensional (2D) van der Waals materials (vdWMs) coupled to plasmonic nanostructures has the potential to enable ultrathin, flexible, and high-brightness illumination devices. However, addressing the limitation of locally scattered small plasmon-enhanced areas remains challenging. Here, we present a 2D plasmonic enhancement of photoluminescence (PL) spanning nearly 800 μm<sup>2</sup>, enabled by surface lattice resonance (SLR) in a 2D vdWM-Au slot lattice hybrid. The Au slot lattice is designed and fabricated using Babinet’s principle and Rayleigh’s anomaly to maximize radiative decay rate and induce non-local photo-excitation in a MoSe<sub>2</sub> monolayer. For emitted PL coupled with SLR, enhanced by up to 32-fold, we investigate its in-plane directivity and long-range propagation using angle- and space-resolved spectroscopic PL measurements. Our experiment reveals that a nearly 800 μm<sup>2</sup> 2D luminescent sheet can be achieved regardless of the size of the MoSe<sub>2</sub> crystal, even with a sub-μm<sup>2</sup> flake. This work provides a new type of ultrabright, large-area 2D luminescent material, suitable for a range of optical illumination, communication, and sensing devices.</p>

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High momentum two-dimensional propagation of emitted photoluminescence coupled with surface lattice resonance

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月20日

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  • Yeonjeong Koo,
  • Dong Kyo Oh,
  • Jungho Mun,
  • Artem N. Abramov,
  • Mikhail Tyugaev,
  • Yong Bin Kim,
  • Inki Kim,
  • Tae Ho Kim,
  • Sera Yang,
  • Yeseul Kim,
  • Jonghwan Kim,
  • Vasily Kravtsov,
  • Junsuk Rho,
  • Kyoung-Duck Park

摘要

Dramatic fluorescence enhancement in two-dimensional (2D) van der Waals materials (vdWMs) coupled to plasmonic nanostructures has the potential to enable ultrathin, flexible, and high-brightness illumination devices. However, addressing the limitation of locally scattered small plasmon-enhanced areas remains challenging. Here, we present a 2D plasmonic enhancement of photoluminescence (PL) spanning nearly 800 μm2, enabled by surface lattice resonance (SLR) in a 2D vdWM-Au slot lattice hybrid. The Au slot lattice is designed and fabricated using Babinet’s principle and Rayleigh’s anomaly to maximize radiative decay rate and induce non-local photo-excitation in a MoSe2 monolayer. For emitted PL coupled with SLR, enhanced by up to 32-fold, we investigate its in-plane directivity and long-range propagation using angle- and space-resolved spectroscopic PL measurements. Our experiment reveals that a nearly 800 μm2 2D luminescent sheet can be achieved regardless of the size of the MoSe2 crystal, even with a sub-μm2 flake. This work provides a new type of ultrabright, large-area 2D luminescent material, suitable for a range of optical illumination, communication, and sensing devices.