English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Circular dichroism and helical dichroism are intriguing chiroptical phenomenawith broad applications in optical sensing and imaging. Here, we generalize oneof the phenomena-helical dichroism-to acoustics. We show that a one-dimensionallattice of chiral resonators with loss can induce differential absorption ofhelical sounds (i.e. acoustic vortices) carrying opposite orbital angularmomentum (OAM). This acoustic helical dichroism strongly depends on therotation symmetry of the chiral resonators. A breaking of the $C_4$ rotationsymmetry can induce coupling between the opposite chiral dipole modes of theresonators. This leads to OAM bandgaps and non-Hermitian exceptional pointsnear the Brillouin-zone center and boundaries, which together give rise tosignificantly enhanced helical dichroism. The underlying physics can be wellcaptured by an effective Hamiltonian that quantitatively reproduces the complexband structures. The acoustic helical dichroism can find important applicationsin acoustic OAM manipulations and chiral sound-matter interactions.

Acoustic helical dichroism in a one-dimensional lattice of chiral resonators