title: Symmetry Engineering of Graphene Plasmonic Crystals.
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.
authors.affiliation: †School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.
authors.forename: Kitty Y M
authors.initials: KY
authors.lastname: Yeung
authors.affiliation: †School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.
authors.forename: Jingyee
authors.initials: J
authors.lastname: Chee
authors.affiliation: ‡Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
authors.forename: Yi
authors.initials: Y
authors.lastname: Song
authors.affiliation: ‡Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
authors.forename: Jing
authors.initials: J
authors.lastname: Kong
authors.affiliation: †School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.
authors.forename: Donhee
authors.initials: D
authors.lastname: Ham
keywords: Graphene; and bandgap engineering; far-infrared; photonic crystals; plasmonic crystals; plasmonics; point group symmetry; terahertz