Topological wireless communication in the stopband of magnetoinductive lines

Abstract

Conventionally, in engineering, the stopband of periodic structures, where propagating signals are unable to penetrate them, was of little interest to engineers. However, with the advent of topological physics, this has changed, and the stopband has moved into the center of attention. Here, we study the behavior of magnetoinductive waves in the stopband of a diatomic line. Surprisingly, here, we find that for lines hosting topological edge states, the signal power at frequencies in the stopband can be higher than anywhere in the passband. Further, they may also exceed both the signal power and Shannon capacity of a conventional monoatomic line, making them of interest for application in wireless communication.