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Modes splitting in graphene-based double-barrier waveguides |
| Si-Pu You(有四普), Ying He(何英), Yan-Fang Yang(杨艳芳), Hui-Fang Zhang(张惠芳) |
| Department of Physics, College of Sciences, Shanghai University, Shanghai 200444, China |
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Abstract The graphene-based double-barrier waveguides induced by electric field have been investigated. The guided modes can only exist in the case of Klein tunneling, and the fundamental mode is absent. The guided modes in the single-barrier waveguide split into symmetric and antisymmetric modes with different incident angles in the double-barrier waveguide. The phase difference between electron states and hole states is also discussed. The phase difference for the two splitting modes is close to each other and increases with the order of guided modes. These phenomena can be helpful for the potential applications in graphene-based optoelectronic devices.
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Received: 28 June 2016
Revised: 17 November 2016
Accepted manuscript online:
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PACS:
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03.65.Pm
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(Relativistic wave equations)
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05.60.Gg
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(Quantum transport)
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94.05.Pt
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(Wave/wave, wave/particle interactions)
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41.75.Fr
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(Electron and positron beams)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11204170 and 61108010) and the Shanghai Municipal Commission of Science and Technology, China (Grant No. 16ZR1411600). |
Corresponding Authors:
Ying He
E-mail: heying@staff.shu.edu.cn
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Cite this article:
Si-Pu You(有四普), Ying He(何英), Yan-Fang Yang(杨艳芳), Hui-Fang Zhang(张惠芳) Modes splitting in graphene-based double-barrier waveguides 2017 Chin. Phys. B 26 030301
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