Synthetic Pseudo-Spin-Hall effect in acoustic metamaterials

4Citations
Citations of this article
16Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

While vector fields naturally offer additional degrees of freedom for emulating spin, acoustic pressure field is scalar in nature, and it requires engineering of synthetic degrees of freedom by material design. Here we experimentally demonstrate the control of sound waves by using two types of engineered acoustic systems, where synthetic pseudo-spin emerges either as a consequence of the evanescent nature of the field or due to lattice symmetry. First, we show that evanescent sound waves in perforated films possess transverse angular momentum locked to their propagation direction which enables their directional excitation. Second, we demonstrate that lattice symmetries of an acoustic kagome lattice also enable a synthetic transverse pseudo-spin locked to the linear momentum, enabling control of the propagation of modes both in the bulk and along the edges. Our results open a new degree of control of radiation and propagation of acoustic waves thus offering new design approaches for acoustic devices.

References Powered by Scopus

Colloquium: Topological insulators

16557Citations
N/AReaders
Get full text

Topological insulators and superconductors

11918Citations
N/AReaders
Get full text

Z2 topological order and the quantum spin hall effect

5472Citations
N/AReaders
Get full text

Cited by Powered by Scopus

Damage-programmable design of metamaterials achieving crack-resisting mechanisms seen in nature

9Citations
N/AReaders
Get full text

Emergence of two-fold non-Hermitian spectral topology through synthetic spin engineering

1Citations
N/AReaders
Get full text

Manipulation of directional acoustic spin angular momentum density based on gradient-structured waveguides

1Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Weiner, M., Ni, X., Alù, A., & Khanikaev, A. B. (2022). Synthetic Pseudo-Spin-Hall effect in acoustic metamaterials. Nature Communications, 13(1). https://doi.org/10.1038/s41467-022-34072-4

Readers' Seniority

Tooltip

Researcher 4

57%

PhD / Post grad / Masters / Doc 3

43%

Readers' Discipline

Tooltip

Physics and Astronomy 8

89%

Engineering 1

11%

Article Metrics

Tooltip
Mentions
News Mentions: 1

Save time finding and organizing research with Mendeley

Sign up for free