Enhanced circular dichroism based on the dual-chiral metamaterial in terahertz regime

doi:10.1088/1674-1056/25/5/058103

中国物理B ›› 2016, Vol. 25 ›› Issue (5): 58103-058103.doi: 10.1088/1674-1056/25/5/058103

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Enhanced circular dichroism based on the dual-chiral metamaterial in terahertz regime

Jian Shao(邵健), Jie Li(李杰), Ying-Hua Wang(王英华), Jia-Qi Li(李家奇), Zheng-Gao Dong(董正高), Lin Zhou(周林)

1. Physics Department and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China;
2. School of Physics and Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China

收稿日期:2015-10-26 修回日期:2016-01-08 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: Zheng-Gao Dong E-mail:zgdong@seu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174051, 11374049, and 11204139), the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20131283), and the Fundamental Research Funds for the Central Universities, China.

Enhanced circular dichroism based on the dual-chiral metamaterial in terahertz regime

Jian Shao(邵健)¹, Jie Li(李杰)¹, Ying-Hua Wang(王英华)¹, Jia-Qi Li(李家奇)¹, Zheng-Gao Dong(董正高)¹, Lin Zhou(周林)²

1. Physics Department and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China;
2. School of Physics and Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China

Received:2015-10-26 Revised:2016-01-08 Online:2016-05-05 Published:2016-05-05
Contact: Zheng-Gao Dong E-mail:zgdong@seu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174051, 11374049, and 11204139), the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20131283), and the Fundamental Research Funds for the Central Universities, China.

摘要/Abstract

摘要： The obvious circular dichroism (CD) and optical activity can be obtained based on the chiral metamaterial due to the plasmon-enhanced effect, which is very attractive for future compact devices with enhanced capabilities of light manipulation. In this paper, we propose a dual-chiral metamaterial composed of bilayer asymmetric split ring resonators (ASRR) that are in mirror-symmetry shape. It is demonstrated that the CD can get enhancement in the terahertz regime. Moreover, the CD can be further improved by modulating the asymmetry of ASRR. The enhanced CD effect in the terahertz regime has great potential applications in sensing, biomedical imaging, and molecular recognition.

关键词: metamaterial, plasmonics, circular dichroism

Abstract: The obvious circular dichroism (CD) and optical activity can be obtained based on the chiral metamaterial due to the plasmon-enhanced effect, which is very attractive for future compact devices with enhanced capabilities of light manipulation. In this paper, we propose a dual-chiral metamaterial composed of bilayer asymmetric split ring resonators (ASRR) that are in mirror-symmetry shape. It is demonstrated that the CD can get enhancement in the terahertz regime. Moreover, the CD can be further improved by modulating the asymmetry of ASRR. The enhanced CD effect in the terahertz regime has great potential applications in sensing, biomedical imaging, and molecular recognition.

Key words: metamaterial, plasmonics, circular dichroism

中图分类号: (Metamaterials for chiral, bianisotropic and other complex media)

81.05.Xj

41.20.Jb (Electromagnetic wave propagation; radiowave propagation)

邵健, 李杰, 王英华, 李家奇, 董正高, 周林. Enhanced circular dichroism based on the dual-chiral metamaterial in terahertz regime[J]. 中国物理B, 2016, 25(5): 58103-058103.

Jian Shao(邵健), Jie Li(李杰), Ying-Hua Wang(王英华), Jia-Qi Li(李家奇), Zheng-Gao Dong(董正高), Lin Zhou(周林). Enhanced circular dichroism based on the dual-chiral metamaterial in terahertz regime[J]. Chin. Phys. B, 2016, 25(5): 58103-058103.

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Enhanced circular dichroism based on the dual-chiral metamaterial in terahertz regime

Enhanced circular dichroism based on the dual-chiral metamaterial in terahertz regime

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