Demonstration of topological wireless power transfer

Li Zhang; Yihao Yang; Zhao Jiang; Qiaolu Chen; Qinghui Yan; Zhouyi Wu; Baile Zhang; Jiangtao Huangfu; Hongsheng Chen

doi:10.1016/j.scib.2021.01.028

Demonstration of topological wireless power transfer

Sci Bull (Beijing). 2021 May 30;66(10):974-980. doi: 10.1016/j.scib.2021.01.028. Epub 2021 Jan 26.

Authors

Li Zhang¹, Yihao Yang², Zhao Jiang³, Qiaolu Chen¹, Qinghui Yan¹, Zhouyi Wu³, Baile Zhang⁴, Jiangtao Huangfu⁵, Hongsheng Chen⁶

Affiliations

¹ Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; ZJU-Hangzhou Global Science and Technology Innovation Center, Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, Zhejiang University, Hangzhou 310027, China; International Joint Innovation Center, ZJU-UIUC Institute, Zhejiang University, Haining 314400, China.
² Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; ZJU-Hangzhou Global Science and Technology Innovation Center, Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, Zhejiang University, Hangzhou 310027, China; International Joint Innovation Center, ZJU-UIUC Institute, Zhejiang University, Haining 314400, China; Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore; Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore 639798, Singapore. Electronic address: yangyihao@zju.edu.cn.
³ Laboratory of Applied Research on Electromagnetics (ARE), Zhejiang University, Hangzhou 310027, China.
⁴ Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore; Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore 639798, Singapore. Electronic address: blzhang@ntu.edu.sg.
⁵ Laboratory of Applied Research on Electromagnetics (ARE), Zhejiang University, Hangzhou 310027, China. Electronic address: huangfujt@zju.edu.cn.
⁶ Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; ZJU-Hangzhou Global Science and Technology Innovation Center, Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, Zhejiang University, Hangzhou 310027, China; International Joint Innovation Center, ZJU-UIUC Institute, Zhejiang University, Haining 314400, China. Electronic address: hansomchen@zju.edu.cn.

PMID: 36654254
DOI: 10.1016/j.scib.2021.01.028

Abstract

Recent advances in non-radiative wireless power transfer (WPT) technique essentially relying on magnetic resonance and near-field coupling have successfully enabled a wide range of applications. However, WPT systems based on double resonators are severely limited to short- or mid-range distance, due to the deteriorating efficiency and power with long transfer distance. WPT systems based on multi-relay resonators can overcome this problem, which, however, suffer from sensitivity to perturbations and fabrication imperfections. Here, we experimentally demonstrate a concept of topological wireless power transfer (TWPT), where energy is transferred efficiently via the near-field coupling between two topological edge states localized at the ends of a one-dimensional radiowave topological insulator. Such a TWPT system can be modelled as a parity-time-symmetric Su-Schrieffer-Heeger (SSH) chain with complex boundary potentials. Besides, the coil configurations are judiciously designed, which significantly suppress the unwanted cross-couplings between nonadjacent coils that could break the chiral symmetry of the SSH chain. By tuning the inter- and intra-cell coupling strengths, we theoretically and experimentally demonstrate high energy transfer efficiency near the exceptional point of the topological edge states, even in the presence of disorder. The combination of topological metamaterials, non-Hermitian physics, and WPT techniques could promise a variety of robust, efficient WPT applications over long distances in electronics, transportation, and industry.

Keywords: Exceptional point; Su-Schrieffer-Heeger model; Topological metamaterials; Wireless power transfer.