Large-area topological wireless power transfer

TL;DR

This paper demonstrates a large-area topological wireless power transfer system using a defect state in a chain of coupled resonators, enabling efficient, robust, and simultaneous power delivery to multiple spatially distributed loads.

Contribution

The work introduces a novel large-area topological WPT method leveraging defect states in SSH configurations for improved multi-target energy transfer.

Findings

Achieved stable wireless power transfer to multiple targets.

Enhanced robustness against device positional variations.

Demonstrated large-area, concurrent power delivery.

Abstract

Topological wireless power transfer (WPT) technologies have attracted considerable interest due to their high transmission efficiency and robustness in coupled array configurations. However, conventional periodic and quasi-periodic topological chains exhibit limited adaptability in complex application scenarios, such as large-area simultaneous multi-load charging. In this work, we experimentally demonstrate a large-area topological defect state by constructing a gapless chain of uniformly coupled resonators at the interface of two topologically distinct Su-Schrieffer-Heeger (SSH) configurations. This topological defect state exhibits strong localization at multiple target sites, enabling efficient and concurrent wireless power delivery to spatially distributed loads. Furthermore, the unique wavefunction distribution enhances robustness against positional variations, ensuring stable energy transfer despite fluctuations in device placement. The proposed large-area topological framework offers fundamental insights into harnessing diverse topological states for advanced WPT applications, particularly in scenarios demanding spatial flexibility and multi-target energy delivery.