Interfacing differently oriented biaxial van der Waals crystals for negative refraction.

ABSTRACT: Negative refraction has a wide range of applications in diverse fields such as imaging, sensing, and waveguides and typically entails the fabrication of intricate metamaterials endowed with hyperbolic features. In contrast to artificially engineered hyperbolic materials, natural van der Waals (vdW) materials are more accessible owing to their inherent strong in-plane covalent bonding and weak interlayer interactions. However, most vdW materials manifest uniaxial crystal properties, which restrict their behavior solely to out-of-plane hyperbolicity. This characteristic poses a considerable challenge to their seamless integration via planar fabrication techniques, unless a suitable pattern is employed. Recent advances have identified natural biaxial α-MoO₃ as a promising vd

SUBMITTER: Liu RT 

PROVIDER: S-EPMC11501674 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature