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<p>Hyperbolic polaritons have drawn great attention in nanoscale light manipulation due to their unique properties. Currently, most studies focus on natural hyperbolic phonon materials in the mid-infrared, limiting their application in the visible to near-infrared range. Here, we present a work on broadband near-infrared hyperbolic plasmon polaritons in a van der Waals material MoOCl<sub>2</sub> by a perturbation-free direct imaging technique of photoemission electron microscopy. In particular, the hyperbolic polariton behavior has been dynamically tailored and manipulated by wavelength, polarization, interlayer twist, and artificial structure, providing a reconfigurable platform for nanophotonic applications. Notably, the full iso-frequency contours can be reconstructed via polarization-selective excitations. Our work has contributed to hyperbolic materials in the broadband near-infrared with MoOCl<sub>2</sub>, and has revealed PEEM to be an ideal method for studying hyperbolic plasmon polaritons at the space-time limit.</p>

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Broadband near-infrared hyperbolic polaritons in MoOCl2

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月4日

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  • Yaolong Li,
  • Yuxin Zhang,
  • Weizhe Zhang,
  • Xiaofang Li,
  • Jinglin Tang,
  • Jingying Xiao,
  • Guanyu Zhang,
  • Xin Liao,
  • Pengzuo Jiang,
  • Qinyun Liu,
  • Yijie Luo,
  • Zini Cao,
  • Qinghong Lyu,
  • Yuanbiao Tong,
  • Ruoxue Yang,
  • Hong Yang,
  • Quan Sun,
  • Yunan Gao,
  • Pan Wang,
  • Zuxin Chen,
  • Wenjing Liu,
  • Shufeng Wang,
  • Guowei Lyu,
  • Xiaoyong Hu,
  • Martin Aeschlimann,
  • Qihuang Gong

摘要

Hyperbolic polaritons have drawn great attention in nanoscale light manipulation due to their unique properties. Currently, most studies focus on natural hyperbolic phonon materials in the mid-infrared, limiting their application in the visible to near-infrared range. Here, we present a work on broadband near-infrared hyperbolic plasmon polaritons in a van der Waals material MoOCl2 by a perturbation-free direct imaging technique of photoemission electron microscopy. In particular, the hyperbolic polariton behavior has been dynamically tailored and manipulated by wavelength, polarization, interlayer twist, and artificial structure, providing a reconfigurable platform for nanophotonic applications. Notably, the full iso-frequency contours can be reconstructed via polarization-selective excitations. Our work has contributed to hyperbolic materials in the broadband near-infrared with MoOCl2, and has revealed PEEM to be an ideal method for studying hyperbolic plasmon polaritons at the space-time limit.