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Articles

Asymmetric transmission of circularly polarized waves in a bi-layered extrinsic chiral metamaterial

, , , &
Pages 1410-1419 | Received 01 Aug 2019, Accepted 22 Nov 2019, Published online: 03 Dec 2019
 

Abstract

In this paper, a kind of bi-layer extrinsic chiral metamaterial is proposed to realize asymmetric transmission (AT) of circularly polarized waves in the microwave region. We have studied numerically and experimentally the transmission properties of the proposed structure. The results show that under oblique incident wave the asymmetric transmission effect occurs with a 1.5 GHz operation band. The maximum value of AT parameter reaches up to 0.68 at the resonant frequency, which is larger than those in the extrinsic chiral metamaterials previously reported. This AT phenomenon is illustrated by the surface current distribution in detail. The transmission properties of the incident waves can be dynamically regulated by tuning the incident angles θ and ϕ. This metamaterial is potential in the polarization control applications.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work is supported by the National Natural Science Foundation of China [grant number 61475079] and is partially sponsored by K.C. Wong Magna Fund in Ningbo University.

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