Far-infrared Graphene Plasmonic Crystals for Plasmonic Band Engineering — SUPPORTING INFORMATION —
نویسندگان
چکیده
Our graphene plasmonic crystals are realized by creating hexagonal lattices of apertures in continuous graphene media. The hexagonal lattice—whether its aperture is circularly or hexagonally shaped—possesses the C6v point group symmetry with 6-fold rotation axes and 6 reflection planes; see Fig. S1 in case of the hexagonal lattice with circular apertures. Following the crystallographic convention, we denote the 12 symmetry operations (elements) constituting the group as E, C6 (×2), C3 (×2), C2, σy (×3), and σx (×3). The 6 irreducible representations of the C6v group are denoted as A1, A2, B1, B2, E1, E2, also following the convention. The character table of the C6v group is in Table S1.
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