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超表面变换光学的研究进展

Research Process of Transformation Optics Based on Metasurface

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摘要

超表面是一种亚波长厚度的二维超构材料,可高效调控电磁波的近场辐射,而变换光学提供了通过设计材料的电磁参数来调控电磁波以预设路径进行传播的理论方法。利用变换光学概念可以模拟广义相对论中弯曲时空的现象。介绍了利用超表面波导开展类比引力的实验工作,模拟宇宙早期暴胀过程中所产生的一维拓扑缺陷——宇宙弦,观察在拓扑非平庸宇宙弦时空中电磁波的定向散射。此外,在超表面波导中引入材料损耗,对希格斯场的相变利用光学模式的对称性破缺进行模拟。对研究现状进行综述,并结合目前研究基础分析超表面的研究前景及发展趋势。

Abstract

Metasurface is a two-dimensional metamaterial with subwavelength thickness, which can effectively regulate the near-field radiation of electromagnetic waves. Transformation optics supplies a theoretical method to control the propagation of an electromagnetic wave by changing the electromagnetic parameters of an artificial material. In particular, the general relativity phenomena in curved spacetime can be emulated via the transformation optics concept. We introduce the experimental work on the analogy of gravity by exploiting a metasurface waveguide, and simulate the cosmic string as a one-dimensional topological defect generated during the early inflation of the universe, as well as the definite photonic deflection in the nontrivial space of cosmic string. Furthermore, by including the material loss, the symmetry breaking of photonic modes can be used to mimic the phase transition of the Higgs vacuum ?eld. This paper summarizes the research status and combines the current research basis to analyze the research prospects and development trends of metasurface.

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DOI:10.3788/LOP56.202402

所属栏目:“等离激元新效应与应用”专题

基金项目:国家自然科学基金、国家重点研发计划、博士后创新人才支持计划;

收稿日期:2019-04-15

修改稿日期:2019-06-24

网络出版日期:2019-10-01

作者单位    点击查看

盛冲:南京大学物理学院固体微结构国家重点实验室人工微结构科学与技术协同创新中心, 江苏 南京 210093
刘辉:南京大学物理学院固体微结构国家重点实验室人工微结构科学与技术协同创新中心, 江苏 南京 210093
祝世宁:南京大学物理学院固体微结构国家重点实验室人工微结构科学与技术协同创新中心, 江苏 南京 210093

联系人作者:盛冲(csheng@nju.edu.cn); 刘辉(liuhui@nju.edu.cn);

备注:国家自然科学基金、国家重点研发计划、博士后创新人才支持计划;

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引用该论文

Sheng Chong,Liu Hui,Zhu Shining. Research Process of Transformation Optics Based on Metasurface[J]. Laser & Optoelectronics Progress, 2019, 56(20): 202402

盛冲,刘辉,祝世宁. 超表面变换光学的研究进展[J]. 激光与光电子学进展, 2019, 56(20): 202402

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