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Experimental observation of roton-like dispersion relations in metamaterials

Martínez, J. A. I.; Groß, M. F. ORCID iD icon; Chen, Y.; Frenzel, T.; Laude, V.; Kadic, M.; Wegener, M.


Previously, rotons were observed in correlated quantum systems at low temperatures, including superfluid helium and Bose-Einstein condensates. Here, following a recent theoretical proposal, we report the direct experimental observation of roton-like dispersion relations in two different three-dimensional metamaterials under ambient conditions. One experiment uses transverse elastic waves in microscale metamaterials at ultrasound frequencies. The other experiment uses longitudinal air-pressure waves in macroscopic channel–based metamaterials at audible frequencies. In both experiments, we identify the roton-like minimum in the dispersion relation that is associated to a triplet of waves at a given frequency. Our work shows that designed interactions in metamaterials beyond the nearest neighbors open unprecedented experimental opportunities to tailor the lowest dispersion branch—while most previous metamaterial studies have concentrated on shaping higher dispersion branches.

Verlagsausgabe §
DOI: 10.5445/IR/1000141113
Veröffentlicht am 15.12.2021
DOI: 10.1126/sciadv.abm2189
Zitationen: 40
Web of Science
Zitationen: 39
Zitationen: 44
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Physik (APH)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2375-2548
KITopen-ID: 1000141113
HGF-Programm 43.32.02 (POF IV, LK 01) Designed Optical Materials
Erschienen in Science Advances
Verlag American Association for the Advancement of Science (AAAS)
Band 7
Heft 49
Seiten Art.-Nr.: eabm2189
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Scopus
Web of Science
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