Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3143614
Keywords
graphene; optical waveguides; quantum wells
Categories
Funding
- National Natural Science Foundation of China [60806041, 60877055]
- Shanghai Rising-Star Program [08QA14030]
- Science and Technology Commission of Shanghai Municipal [08JC14097]
- Shanghai Educational Development Foundation [2007CG52]
- Shanghai Leading Academic Discipline Program [S30105]
- Juan de la Cierva Programme of Spanish Ministry of Science and Innovation.
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By analogy of optical waveguides, we investigate the guided modes in graphene waveguides, which is made of symmetric quantum well. The unique properties of the graphene waveguide are discussed based on the two different dispersion relations, which correspond to classical motion and Klein tunneling, respectively. It is shown that the third-order mode is absent in the classical motion, while the fundamental mode is absent in the Klein tunneling case. We hope these phenomena can lead to the potential applications in graphene-based quantum devices.
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