https://doi.org/10.1140/epjb/s10051-024-00698-0
Regular Article - Mesoscopic and Nanoscale Systems
Dichroism and broadband nonreciprocal transmission in Weyl semimetals
1
Key Laboratory of Atonic and Subatomic Structure and Quantum Control (Ministry of Education), School of Physics, Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University, 510006, Guangzhou, China
2
School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, 510665, Guangzhou, China
c
yinchengping1979@163.com
d
haoxiang.jiang@m.scnu.edu.cn
Received:
5
March
2024
Accepted:
18
April
2024
Published online:
10
May
2024
Dichroism and nonreciprocal transmission are crucial in the propagation and modulation of electromagnetic waves. In this work, we investigate the dichroism of Weyl semimetal film in the Faraday and Voigt configurations and the nonreciprocal transmission in one-dimensional photonic crystals containing Weyl semimetals by means of transfer matrix methods. The results show that the circular dichroism and linear dichroism in the Weyl semimetal film both exceed 98%, and they are both multi-channel or broadband. Furthermore, the broadband nonreciprocal transmission of circularly polarized and linearly polarized light in the mid-infrared range are realized in two kinds of one-dimensional photonic crystals containing Weyl semimetals in the Faraday and Voigt configurations. The corresponding bandwidths exceed 20 THz and 10 THz, respectively. At the same time, the isolations in the Faraday and Voigt configurations are more than 45 and 35 dB, respectively. The insertion losses for both are less than 2.0 dB. These results provide a new possibility to design nonreciprocal devices with high isolation, high integration, and wide bandwidth.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
