| 基于石墨烯一维太赫兹光子晶体电磁特性研究 |
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| 引用本文： | 杨利霞,李玲玲,朱婷,施丽娟.基于石墨烯一维太赫兹光子晶体电磁特性研究[J].电波科学学报,2016,31(2):262-268. |
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| 作者姓名： | 杨利霞 李玲玲 朱婷 施丽娟 |
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| 作者单位： | 1.江苏大学计算机科学与通信工程学院, 镇江 212013 |
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| 基金项目： | 国家自然科学基金面上项目(61072002)，江苏省高等学校大学生实践创新训练计划项目(10299074) |
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| 摘 要： | 采用时域有限差分(Finite Difference Time Domain FDTD)和表面边界条件对单层石墨烯的太赫兹电磁特性进行研究.首先计算了其反射和透射系数, 并与解析解对比验证了该理论的正确性.接着研究了一维光子晶体表面石墨烯在太赫兹光谱范围的吸收.通过改变模型中石墨烯的位置, 得到了一维石墨烯吸收特性与石墨烯位置的关系.结果表明:当石墨烯位于光子晶体表面时, 由于石墨烯和间隔层在光子晶体表面构成了表面缺陷, 从而导致光的局域化, 这种局域化增强了石墨烯对太赫兹范围光的吸收.
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| 关 键 词： | 石墨烯 FDTD方法 表面边界条件 光子晶体 太赫兹 |
| 收稿时间： | 2015-05-18 |
Terahertz electromagnetic characteristics of one-dimensional graphene-photonic crystal by FDTD method |
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| Affiliation: | 1.School of computer science and Communication Engnerring, Jiangsu University, Zhenjiang 212013, China2.School of science, Jiangsu University, Zhenjiang 212013, China |
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| Abstract: | A theoretical research on terahertz electromagnetic characteristics of one-dimensional graphene-photonic crystal is carried out by using the finite-difference time-domain (FDTD) with a surface boundary condition in this paper. Firstly, the reflection and transmission coefficient are given by the FDTD at both sides of the graphene in the terahertz spectrum. Comparison of the simulated results with the analytic ones proved the correctness of the simulation method. Then the absorption characteristics of one-dimensional graphene photonic crystal are studied in the terahertz range. Results with different models of photonic crystal indicate that the localization casued by surface defect can greatly enhance the absorption of graphene which is located in the surface of photonic crystal. |
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| Keywords: | graphene FDTD method surface boundary condition photonic crystal terahertz |
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