Bidirectional mid-infrared communications between two identical macroscopic graphene fibres

Bo Fang, Srikrishna Chanakya Bodepudi, Feng Tian, Xinyu Liu, Dan Chang, Sichao Du, Jianhang Lv, Jie Zhong, Haiming Zhu, Huan Hu, Yang Xu (), Zhen Xu (), Weiwei Gao and Chao Gao ()
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Bo Fang: Zhejiang University
Srikrishna Chanakya Bodepudi: Zhejiang University
Feng Tian: Zhejiang University
Xinyu Liu: Zhejiang University
Dan Chang: Zhejiang University
Sichao Du: Zhejiang University
Jianhang Lv: Zhejiang University
Jie Zhong: Zhejiang University
Haiming Zhu: Zhejiang University
Huan Hu: Zhejiang University/University of Illinois at Urbana-Champaign Joint Institute (ZJU-UIUC), Zhejiang University
Yang Xu: Zhejiang University
Zhen Xu: Zhejiang University
Weiwei Gao: Zhejiang University
Chao Gao: Zhejiang University

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Among light-based free-space communication platforms, mid-infrared (MIR) light pertains to important applications in biomedical engineering, environmental monitoring, and remote sensing systems. Integrating MIR generation and reception in a network using two identical devices is vital for the miniaturization and simplification of MIR communications. However, conventional MIR emitters and receivers are not bidirectional due to intrinsic limitations of low performance and often require cryogenic cooling. Here, we demonstrate that macroscopic graphene fibres (GFs) assembled from weakly-coupled graphene layers allow room-temperature MIR detection and emission with megahertz modulation frequencies due to the persistence of photo-thermoelectric effect in millimeter-length and the ability to rapidly modulate gray-body radiation. Based on the dual-functionality of GFs, we set up a system that conducts bidirectional data transmission by switching modes between two identical GFs. The room-temperature operation of our systems and the potential to produce GFs on industrial textile-scale offer opportunities for simplified and wearable optical communications.

Date: 2020
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DOI: 10.1038/s41467-020-20033-2

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