Wide field-of-hearing metalens for aberration-free sound capture.

ABSTRACT: Metalenses are instruments that manipulate waves and have exhibited remarkable capabilities to date. However, an important hurdle arises due to the severe hampering of the angular response originating from coma and field curvature aberrations, which result in a loss of focusing ability. Herein, we provide a blueprint by introducing the notion of a wide field-of-hearing (FOH) metalens, designed particularly for capturing and focusing sound with decreased aberrations. Employing an aberration-free planar-thin metalens that leverages perfect acoustic symmetry conversion, we experimentally realize a robust wide FOH capability of approximately 140^∘ in angular range. Moreover, our metalens features a relatively short focal length, enabling compact implementation by reducing the apertur

SUBMITTER: Lee D 

PROVIDER: S-EPMC11001966 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature