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

초록

This study presents a prototypical platform to sense fundamental low-energy excitations in mu m-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 mu m-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 mu m-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 mu m-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.

키워드