Focusing Micromechanical Polaritons in Topologically Nontrivial Hyperbolic Metasurfaces.
Adv Mater
; 36(25): e2311599, 2024 Jun.
Article
de En
| MEDLINE
| ID: mdl-38374796
ABSTRACT
Vertically stacked multiple atomically thin layers have recently widened the landscape of rich optical structures thanks to these quantum metamaterials or van der Waals (vdW) materials, featuring hyperbolic polaritons with unprecedented avenues for light. Despite their far-reaching implications, most of their properties rest entirely on a trivial band topological origin. Here, a 2D approach is adopted toward a micromechanical vdW analogue that, as a result of engineered chiral and mirror symmetries, provides topologically resilient hyperbolic radiation of mechanical vibrations in the ultrasonic regime. By applying laser vibrometry of the micrometer-sized metasurface, we are able to exhibit the exotic fingerprints of robust hyperbolic radiation spanning several frequencies, which beyond their physical relevance, may enable ultrasonic technologies.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
Adv Mater
Sujet du journal:
BIOFISICA
/
QUIMICA
Année:
2024
Type de document:
Article
Pays d'affiliation:
Chine