Rotating surface solitons

TL;DR

This paper introduces a new class of rotating surface waves at the edge of concentric ring structures, highlighting their unique properties such as steady rotation, absence of power thresholds at high frequencies, and an upper limit on rotation frequency.

Contribution

The study presents the first analysis of rotating surface solitons at guiding structure edges, revealing their existence conditions and frequency limits.

Findings

Surface waves rotate steadily upon propagation.

High rotation frequencies eliminate power thresholds.

An upper limit on rotation frequency depends on structure parameters.

Abstract

We introduce a novel type of surface waves that form at the edge of guiding structures consisting of several concentric rings. Such surface waves rotate steadily upon propagation and, in contrast to nonrotating waves, for high rotation frequencies they do not exhibit power thresholds for their existence. There exists an upper limit for the surface wave ro-tation frequency, which depends on the radius of the outer guiding ring and on its depth.