Related Experiment Video
Updated: Apr 7, 2026

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
Symmetry Engineering of Graphene Plasmonic Crystals
Kitty Y M Yeung1, Jingyee Chee1, Yi Song2
1†School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.
Abstract:
The dispersion relation of plasmons in graphene with a periodic lattice of apertures takes a band structure. Light incident on this plasmonic crystal excites only particular plasmonic modes in select bands. The selection rule is not only frequency/wavevector matching but also symmetry matching, where the symmetry of plasmonic modes originates from the point group symmetry of the lattice. We demonstrate versatile manipulation of light-plasmon coupling behaviors by engineering the symmetry of the graphene plasmonic crystal.

