| Magnetotransport in a dual waveguide coupled by a finite barrier： Energy filter and directional coupler |
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| 引用本文： | 谢月娥,陈元平,颜晓红. Magnetotransport in a dual waveguide coupled by a finite barrier： Energy filter and directional coupler[J]. 中国物理, 2007, 16(10): 3087-3092. DOI: 10.1088/1009-1963/16/10/044 |
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| 作者姓名： | 谢月娥 陈元平 颜晓红 |
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| 作者单位： | (1)College of Science, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, China; (2)Institute of Modern Physics and Department of Physics, XiangtanUniversity,Xiangtan 411105, China |
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| 基金项目： | Projectsupported by the Project of Hunan Provincial EducationDepartment of China (Grant No 05C103) and the Major Program ofMinistry of Education, China (Grant No 204099). |
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| 摘 要： | We propose in this paper that a dual waveguide coupled by a finitebarrier be able to serve as an energy filter under a perpendicularmagnetic field. In the waveguide direction, the conductance exhibitsa periodic square-wave pattern in which the miniband is controlledby the magnetic and potential modulation. The electrons withenergies in the miniband can completely transfer along one waveguidewhile the other electrons undergo filtration. Compared with thecoupled waveguide without magnetic modulation, the structure undermagnetic field is found to be a good directional coupler. Byadjusting the potential barrier and magnetic field, the electronsinput from one port of waveguide can transfer to any other ports.
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| 关 键 词： | 双波导 磁电机传输 定向耦合器 能量滤波器 |
| 收稿时间： | 2007-02-18 |
| 修稿时间： | 2007-02-18 |
Magnetotransport in a dual waveguide coupled by a finite barrier: Energy filter and directional coupler |
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| Xie Yue-E,Chen Yuan-Ping and Yan Xiao-Hong. Magnetotransport in a dual waveguide coupled by a finite barrier: Energy filter and directional coupler[J]. Chinese Physics, 2007, 16(10): 3087-3092. DOI: 10.1088/1009-1963/16/10/044 |
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| Authors: | Xie Yue-E Chen Yuan-Ping Yan Xiao-Hong |
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| Affiliation: | Institute of Modern Physics and Department of Physics, Xiangtan University, Xiangtan 411105, China; College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | We propose in this paper that a dual waveguide coupled by a finitebarrier be able to serve as an energy filter under a perpendicularmagnetic field. In the waveguide direction, the conductance exhibitsa periodic square-wave pattern in which the miniband is controlledby the magnetic and potential modulation. The electrons withenergies in the miniband can completely transfer along one waveguidewhile the other electrons undergo filtration. Compared with thecoupled waveguide without magnetic modulation, the structure undermagnetic field is found to be a good directional coupler. Byadjusting the potential barrier and magnetic field, the electronsinput from one port of waveguide can transfer to any other ports. |
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| Keywords: | magnetotransport dualwaveguide |
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