Exceptional points in single open acoustic resonator due to the symmetry breaking

Abstract

Exceptional points (EPs) have been widely studied in quantum mechanics, condensed matter physics, optics and photonics. However, their potential in acoustics has only recently been recognized due to the rapid development of acoustic metamaterials. This paper proposes a method for achieving EP conditions in acoustic resonators by lowering their symmetry and enabling resonant mode interaction. The formation of EPs is predicted through direct numerical simulation supported by coupled mode theory and resonant state expansion. These findings have significant implications for the design and optimization of acoustic metamaterials for applications such as acoustic sensing and noise reduction.

8 pages, 6 figures

References in corpus (6)

• The physics of exceptional points
• Resonant state expansion applied to three-dimensional open optical systems
• Bound States in the Continuum in Compact Acoustic Resonators
• Normalization, orthogonality and completeness of quasinormal modes of open systems: the case of electromagnetism
• Metahouse: noise-insulating chamber based on periodic structures
• Symmetry protected exceptional points of interacting fermions

Cited by in corpus (4)

• Chiral Dichroism in Resonant Metasurfaces with Monoclinic Lattices
• Acoustic Bound States in the Continuum in Coupled Helmholtz Resonators
• Strong Mode Coupling via Quasi-Bound States in the Continuum in Bianisotropic Metasurfaces
• Exceptional-point-controlled mode interaction in three-dimensional microcavities represented by generalized Husimi functions