Andrea Alù

Nano-wrinkle waveguides for programmable polariton channeling

Abstract The intrinsic planarity of two-dimensional (2D) van der Waals (vdW) polaritonic media inherently limits the lateral confinement of vdW polaritons. Here, we transcend this geometric limit by introducing a deterministic strategy to engineer non-planar nano-wrinkle waveguid...

Topological polaritons in natural uniaxial materials

Surface polaritons in natural materials offer unique opportunities for tailoring light–matter interactions at the nanoscale. While various classes of surface polaritons have recently been unveiled via near-field imaging techniques, their connection to the underlying topological p...

Mid-infrared long-range surface polaritons in two-dimensional van der Waals materials

The discovery of graphene plasmons (GPs) and hyperbolic phonon polaritons (HPhPs) in two-dimensional (2D) van der Waals (vdW) materials has enabled extreme light confinement and enhanced light-matter interactions, holding the promise for miniaturized mid-infrared (mid-IR) photoni...