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arXiv · 2604.20690

Unidirectional Transverse Scattering in Acoustic Dimers

Mikhail Smagin·Iuliia Timankova·Pavel Pankin·Yong Li·Mihail Petrov
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Abstract

We study unidirectional transverse scattering in a two-dimensional acoustic dimer composed of two circular subwavelength scatterers. Using a coupled multipole model, we show that interparticle coupling enables effective monopole--dipole interference and supports a transverse Kerker effect under plane-wave excitation. In contrast to a single non-absorbing rotationally symmetric particle, where Kerker-type directional scattering is only approached in the weak-scattering limit, the dimer can combine pronounced directionality with strong overall scattering. This regime is promising for compact acoustic beam steering and directional wave routing.

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Mikhail Smagin, Iuliia Timankova, Pavel Pankin, Yong Li, Mihail Petrov. 2026-04-22. Unidirectional Transverse Scattering in Acoustic Dimers. https://doi.org/10.1016/j.photonics.2026.101594

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