Nanoscale-Confined Terahertz Polaritons in a van der Waals Crystal.

ABSTRACT: Electromagnetic field confinement is crucial for nanophotonic technologies, since it allows for enhancing light-matter interactions, thus enabling light manipulation in deep sub-wavelength scales. In the terahertz (THz) spectral range, radiation confinement is conventionally achieved with specially designed metallic structures-such as antennas or nanoslits-with large footprints due to the rather long wavelengths of THz radiation. In this context, phonon polaritons-light coupled to lattice vibrations-in van der Waals (vdW) crystals have emerged as a promising solution for controlling light beyond the diffraction limit, as they feature extreme field confinements and low optical losses. However, experimental demonstration of nanoscale-confined phonon polaritons at THz frequencies has so far r

SUBMITTER: de Oliveira TVAG 

PROVIDER: S-EPMC11468817 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature