Engineering shear polaritons in 2D twisted heterostructures.

ABSTRACT: Materials hosting polaritons with extreme optical anisotropy enable nanoscale light manipulation, crucial for nanophotonic applications. In particular, hyperbolic shear polaritons (HShPs), featuring asymmetric propagation, axial dispersion, and loss redistribution, arise in low-symmetry materials (e.g., β-Ga₂O₃, CdWO₄) through the intricate interplay of photons and non-orthogonal detuned resonant excitations supported by crystals with broken spatial symmetries. Versatile control over HShPs is still challenging to achieve, due to the properties of such bulk natural materials. Here, we unveil engineering and control over HShPs in two-dimensional materials by manipulating twisted bilayers of α-MoO₃, which does not feature broken lattice symmetry at

SUBMITTER: Zhou L 

PROVIDER: S-EPMC11947137 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature