Yongfeng Mei

Wafer-scale low-symmetry graphene moiré superlattice for integrated quantum rectifiers

Low-symmetry materials unlock rich Berry curvature physics and anomalous transport phenomena that are forbidden in high-symmetry quantum systems through rigorous crystalline symmetry constraints. Current approaches rely on external fields or complex heterogeneous stacking to brea...

Kirigami-actuated reconfigurable topological photonic crystals

Photonic crystals are typically fabricated with a fixed topology, freezing their edge and corner states in space and frequency. Here we introduce a kirigami-actuated reconfigurable topological photonic crystal in which a single in-plane rotation reshapes the unit cell, drives a b...