手性等离激元超表面圆二向色性光谱传感特性理论研究

量子电子学报 ›› 2020, Vol. 37 ›› Issue (3): 257-265.

• 光谱 • 下一篇

手性等离激元超表面圆二向色性光谱传感特性理论研究

李继武1，王春2，邴丕彬3，蒋海涛1,4

1 焦作师范高等专科学校理工学院, 河南焦作 454000; 2 河南师范大学物理学院, 河南新乡 453007; 3 华北水利水电大学电力学院, 河南郑州 450045; 4 西北工业大学电子信息学院, 陕西西安 710129

收稿日期:2020-01-19 修回日期:2020-03-05 出版日期:2020-05-28 发布日期:2020-05-28
通讯作者: 联系方式 E-mail:lijiwuwork@qq.com
作者简介:李继武（1971—），河南焦作人，硕士，讲师，主要从事超材料，光谱传感技术方面的研究。 E-mail: lijiwuwork@qq.com
基金资助:
Supported by Young Scientists Fund of the National Natural Science Foundation of China (国家自然科学基金青年科学基金, 61601183）

Theoretical Study on Circular Dichroism Spectral Sensing Properties of Chiral Plasmonic Metasurface

LI Jiwu1, WANG Chun2, BING Pibing3, JIANG Haitao1,4

1 School of Science and Technology, Jiaozuo Normal College, Jiaozuo 454000, China； 2 School of Physics, Henan Normal University, Xinxiang 453007, China； 3 Institute of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China； 4 School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710129, China

Received:2020-01-19 Revised:2020-03-05 Published:2020-05-28 Online:2020-05-28

摘要/Abstract

摘要： 理论研究了一种手性双层等离激元超表面的圆二向色性光谱传感效应。通过分析其电磁场的空间分布发现，这种由人工结构增强的手性响应的产生归因于等离激元超表面狭缝的局域等离激元与两层超表面之间的耦合作用，且这种结构的圆二向色性透射光谱与圆共偏振透射光谱的变化对生化层折射率的变化具有不同的响应。在合适的结构参数下，圆共偏振透射光谱以及圆二向色性透射光谱传感灵敏度最大分别能够达到109 nm/RIU、111 nm/RIU。该人工手性结构具备共偏振光谱和圆二向色性光谱传感功能，在新型生化传感器件领域具有潜在的应用价值。

关键词: 光学, 传感, 有限元方法, 手性, 圆二向色性光谱, 太赫兹波

Abstract: The circular dichroism spectral sensing effect of a chiral double-layer plasmon metasurface is investigated theoretically. By analyzing the spatial distribution of the electromagnetic field in the structure, it can be found that the enhanced chiral resonance response of the artificial structure is due to the local plasmon resonance in the slit and the coupling effect between two metasurfaces, and the circular dichroism transmission spectrum and co-polarized transmission spectrum of this structure respond differently to the refractive index changes of the biochemical layer. Under proper structural parameters, the sensitivity of circular co-polarized spectrum and circular dichroism spectrum can reach 109 nm/RIU and 111 nm/RIU, respectively. It is shown that the artificial chiral structure has the functions of co-polarized spectrum and circular dichroism spectrum sensing, and has potential application value in the field of new biochemical sensor devices.

Key words: optics, sensing, finite element method, chirality, circular dichroism spectroscopy, terahertz wave

中图分类号:

O436.3

李继武, 王春, 邴丕彬, 蒋海涛, . 手性等离激元超表面圆二向色性光谱传感特性理论研究[J]. 量子电子学报, 2020, 37(3): 257-265.

LI Jiwu, WANG Chun, BING Pibing, JIANG Haitao, . Theoretical Study on Circular Dichroism Spectral Sensing Properties of Chiral Plasmonic Metasurface[J]. Chinese Journal of Quantum Electronics, 2020, 37(3): 257-265.

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手性等离激元超表面圆二向色性光谱传感特性理论研究

Theoretical Study on Circular Dichroism Spectral Sensing Properties of Chiral Plasmonic Metasurface

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