Topological Wireless Power Transfer With Relay Edge States

Using topological edge states of diatomic magnetoinductive waveguides, efficient wireless power transfer in the stopband with superior robustness against disorder is possible. A drawback of this approach is that the evanescent nature of the coupling to the edge states imposes a limit in transfer range. Here, we show that by adding additional interfaces to the waveguides we are able to engineer edge states acting as relays thus overcoming this range limitation.