Hyperbolic shear polaritons (HShPs) are strongly confined light-matter excitations that have been previously observed in low-symmetry 3D materials with limited tunability. Here, the authors report the observation and manipulation of HShPs in twisted bilayers α-MoO3 by tuning the sample structure or using a graphene electrostatic gate.
- Lei Zhou
- Xiang Ni
- Tao Jiang