期刊
NANO LETTERS
卷 15, 期 8, 页码 5001-5009出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b00970
关键词
Graphene; plasmonics; plasmonic crystals; photonic crystals; far-infrared; terahertz; point group symmetry; bandgap engineering
类别
资金
- Air Force Office of Scientific Research [FA9550-13-1-0211]
- Office of Naval Research [N00014-13-1-0806]
- National Science Foundation STC Center for Integrated Quantum Materials [DMR-1231319]
- National Science Scholarship, Singapore
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.
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