Experimental observation of roton-like dispersion relations in metamaterials

Authors: Julio Andrés Iglesias Martínez, Michael Fidelis Groß, Yi Chen, Tobias Frenzel, Vincent Laude, Muamer Kadic, Martin Wegener

Published: 2021-12-01

DOI: 10.1126/sciadv.abm2189

Source: Full article

---

Abstract

Artificial materials support elastic or acoustic waves whose travel direction continuously changes from backward to forward.