# Two-Dimensional Moiré Phonon Polaritons

## TL;DR

The paper discovers new types of light–matter modes in twisted 2D materials, which could help control light at the nanoscale.

## Contribution

The study introduces a new class of moiré phonon polaritons with nanopatterned electromagnetic wave functions.

## Key findings

- Moiré structures create multiple branches of phonon polaritons with spectral reconstruction.
- Electromagnetic wave functions are nanopatterned by the moiré superlattice.
- Numerical simulations confirm the existence of moiré PhPs and their spatially varying near-field response.

## Abstract

Phonon polaritons (PhPs) are hybrid light–matter
modes.
We investigate them in two-dimensional (2D) materials with twisted
moiré structures, revealing that the moiré potential
creates a new class of “moiré PhPs”. These exhibit
a fundamental spectral reconstruction into multiple branches and,
crucially, electromagnetic wave functions that are nanopatterned by
the superlattice. Through numerical simulations based on realistic
lattice models, we confirm the existence of these intriguing modes.
The inherent nanoscale structuring produces a robust, spatially varying
near-field response, establishing moiré superlattices as a
platform for engineering light–matter interactions.