Excitation and detection of acoustic phonons in nanoscale systems

RC Ng, A El Sachat, F Cespedes, M Poblet, G Madiot… - Nanoscale, 2022‏ - pubs.rsc.org
Phonons play a key role in the physical properties of materials, and have long been a topic
of study in physics. While the effects of phonons had historically been considered to be a …

Actively controllable topological phase transition in homogeneous piezoelectric rod system

W Zhou, B Wu, Z Chen, W Chen, CW Lim… - Journal of the Mechanics …, 2020‏ - Elsevier
By employing periodic electrical boundary conditions, an innovative method to generate
actively tunable topologically protected interface mode in a “homogeneous” piezoelectric …

Review and prospects of metamaterials used to control elastic waves and vibrations

H Dai, X Zhang, Y Zheng, W Pei, R Zhou, R Liu… - Frontiers in …, 2022‏ - frontiersin.org
Acoustic metamaterials, artificial composite structures with exotic material properties used to
control elastic waves, have become a new frontier in physics, materials science, engineering …

Tunable anti-plane wave bandgaps in 2D periodic hard-magnetic soft composites

S Padmanabhan, Z Alam, AK Sharma - International Journal of Mechanical …, 2024‏ - Elsevier
In this paper, we present a theoretical model for the analysis of large magneto-deformation
and the anti-plane shear wave bandgaps in 2D periodic two-phase hard magnetic soft …

High-frequency topological corner and edge states in elastic honeycomb plates

F Hong, K Zhang, L Qi, B Ding, Z Deng - International Journal of …, 2023‏ - Elsevier
Higher-order topological insulators (HOTIs) have attracted considerable attention because
of their topological properties of low-dimensional topological corner states and edge states …

Optimal quantum valley Hall insulators by rationally engineering Berry curvature and band structure

Z Du, H Chen, G Huang - Journal of the Mechanics and Physics of Solids, 2020‏ - Elsevier
We propose the concept of” optimal quantum valley Hall insulators” and formulate it to an
optimization formulation. In this new design paradigm, mechanical valley Hall insulators with …

Elastic three-dimensional phononic topological insulators with Dirac hierarchy

SY Huo, QS Yang, JJ Chen, HK Li, LC Yao… - Science China Physics …, 2024‏ - Springer
Abstract Three-dimensional (3D) phononic topological insulators (TIs) featuring two-
dimensional (2D) surface states and one-dimensional (1D) hinge states have opened up a …

3D printed architected hollow sphere foams with low-frequency phononic band gaps

O McGee, H Jiang, F Qian, Z Jia, L Wang, H Meng… - Additive …, 2019‏ - Elsevier
We experimentally and numerically investigate elastic wave propagation in a class of
lightweight architected materials composed of hollow spheres and binders. Elastic wave …

Topological beam-splitting in photonic crystals

M Makwana, R Craster, S Guenneau - Optics Express, 2019‏ - opg.optica.org
We create a passive wave splitter, created purely by geometry, to engineer three-way beam
splitting in electromagnetism in transverse electric and magnetic polarisation. We do so by …

Low frequency and wide band gap metamaterial with divergent shaped star units: Numerical and experimental investigations

N Kumar, S Pal - Applied Physics Letters, 2019‏ - pubs.aip.org
Accomplishing low frequency and wide bandgaps with a single phase metamaterial remains
a challenging task. In this work, we propose a single phase acoustic metamaterial having …