Electrically tunable graphene-based multi-band terahertz metamaterial filters

Author:

Wu Pei-Jung,Tsai Wei-Cheng1,Yang Chan-Shan2ORCID

Affiliation:

1. National Taiwan Normal University

2. National Cheng Kung University

Abstract

In this study, we have designed an electrically tunable multi-band terahertz (THz) metamaterial filter based on graphene and multiple-square-loop structures. The structure contains multiple metal square loops, and these loops with different sizes correspond to different THz frequencies, achieving our expected efficacy of a multiband wave filter. Furthermore, by sweeping external voltages, we could change graphene’s Fermi levels, and thus the high-sensitivity THz filter's capability from single-band to multi-band filtering can be modulated. We expect that this study of a hybrid THz wave filter would be promising for the development of selecting channels in THz and 6 G communications.

Funder

Ministry of Science and Technology, Taiwan

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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