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<p>This study presents a prototypical platform to sense fundamental low-energy excitations in µm-sized two-dimensional (2D) materials with sub-millimeter (mm)-wavelength electromagnetic (EM) radiation by harnessing a single antenna. Despite the large difference in diffraction-limited focusing of sub-mm-wavelength light and the µm-sized 2D materials, strong light-matter interaction is facilitated by specially designed antenna structures (slot or bowtie antennas) with the sample positioned in regions of enhanced three-dimensional (3D) field confinement. The interaction of the resonant meta-atoms and the sample of interest, here µm-sized graphite, MoS<sub>2</sub>, and hBN modifies the meta-atom’s dielectric properties, and hence, the single antenna’s transmittance changes remarkably in the presence of the µm-sized samples finely positioned by the dry transfer method. This result paves the route toward investigating low-energy excitations in various 2D materials in the regime of mm-wavelength EM waves.</p>

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Prototype for Strong Interaction of Micron-Sized van der Waals Materials with Sub-Millimeter Waves Using a Single Metal Antenna

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Hajung Park,
  • Bong Joo Kang,
  • Taehoon Kim,
  • Seong-Eun Lim,
  • Eun-Ji Hwang,
  • Yeon-Ji Kim,
  • Taewon Goo,
  • Jaeseung Im,
  • Woongkyu Park,
  • Minwoo Lee,
  • Seung Ryong Park,
  • Soobong Choi,
  • JunHo Kim,
  • Kyoung-Ho Kim,
  • Thomas Feurer,
  • Sung Ju Hong,
  • Young-Mi Bahk

摘要

This study presents a prototypical platform to sense fundamental low-energy excitations in µm-sized two-dimensional (2D) materials with sub-millimeter (mm)-wavelength electromagnetic (EM) radiation by harnessing a single antenna. Despite the large difference in diffraction-limited focusing of sub-mm-wavelength light and the µm-sized 2D materials, strong light-matter interaction is facilitated by specially designed antenna structures (slot or bowtie antennas) with the sample positioned in regions of enhanced three-dimensional (3D) field confinement. The interaction of the resonant meta-atoms and the sample of interest, here µm-sized graphite, MoS2, and hBN modifies the meta-atom’s dielectric properties, and hence, the single antenna’s transmittance changes remarkably in the presence of the µm-sized samples finely positioned by the dry transfer method. This result paves the route toward investigating low-energy excitations in various 2D materials in the regime of mm-wavelength EM waves.