| 基于负微分电阻碳纳米管的太赫兹波有源超材料特性参数提取 |
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| 引用本文： | 司黎明,侯吉旋,刘埇,吕昕.基于负微分电阻碳纳米管的太赫兹波有源超材料特性参数提取[J].物理学报,2013,62(3):37806-037806. |
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| 作者姓名： | 司黎明 侯吉旋 刘埇 吕昕 |
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| 作者单位： | 1. 北京理工大学信息与电子学院电子工程系, 毫米波与太赫兹波技术北京市重点实验室, 北京 100081;
2. 东南大学物理系, 南京 211189 |
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| 基金项目： | 国家重点基础研究发展计划(批准号: 2010CB327506, 61372010302);国家高技术研究发展计划(批准号: 2012AA8123012)和国家自然科学基金(批准号: 61275107)资助的课题. |
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| 摘 要： | 利用碳纳米管在外加静电场下可产生常温太赫兹频段负微分电阻的特性, 提出了太赫兹波频段的有源超材料设计方法以及块状有源超材料等效电磁特性参数提取方法. 对无源金属线阵进行参数提取, 证明所提出的块状有源超材料等效电磁特性参数提取方法, 可以有效解决传 统参数提取中的符号与多分支选择问题. 通过对嵌入具有负微分电阻特性的碳纳米管的金属线阵进行参数提取, 发现太赫兹波有源超材料不仅具有等效介电常数虚部为负(代表电有源)的特性, 而且还具有磁性色散的特性.
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| 关 键 词： | 有源超材料 太赫兹波 参数提取 碳纳米管 |
| 收稿时间： | 2012-05-23 |
Extraction of effective constitutive parameters of active terahertz metamaterial with negative differential resistance carbon nanotubes |
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| Si Li-Ming,Hou Ji-Xuan,Liu Yong,L&#,Xin.Extraction of effective constitutive parameters of active terahertz metamaterial with negative differential resistance carbon nanotubes[J].Acta Physica Sinica,2013,62(3):37806-037806. |
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| Authors: | Si Li-Ming Hou Ji-Xuan Liu Yong L&# Xin |
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| Institution: | 1. Department of Electronic Engineering, School of Information and Electronics, Beijing Key Laboratory of Millimeter Wave and Terahertz Technology, Beijing Institute of Technology, Beijing 100081, China;
2. Department of Physics, Southeast University, Nanjing 211189, China |
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| Abstract: | A strategy is presented to acquire active terahertz (THz) metamaterial by incorporating negative differential resistance carbon nanotubes. Furthermore, we propose a method of extracting active metamaterial effective parameters. This new method can effectively solve the problems of signs and multi-branches, while the traditional parameter extraction method becomes powerless for active case. Our results indicate that the active THz metamaterial with metal wires array not only has negative value of the imaginary part of the permittivity but also presents magnetic-dispersion characteristics. |
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| Keywords: | active metamaterial terahertz wave parameter extraction carbon nanotubes |
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