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

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

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.

Keywords: metamaterial plasmonics circular dichroism

Received: 26 October 2015
Revised: 08 January 2016
Accepted manuscript online:

PACS:	81.05.Xj	(Metamaterials for chiral, bianisotropic and other complex media)
	41.20.Jb	(Electromagnetic wave propagation; radiowave propagation)

Fund: 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.

Corresponding Authors: Zheng-Gao Dong
E-mail: zgdong@seu.edu.cn

Cite this article:

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 2016 Chin. Phys. B 25 058103

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

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