Controlling water waves with artificial structures

S Zhu, X Zhao, L Han, J Zi, X Hu, H Chen - Nature Reviews Physics, 2024‏ - nature.com
Because of analogies between the 2D Maxwell equations and water wave equations,
methods for manipulating electromagnetic waves based on photonic crystals and …

Acoustic metamaterials: From local resonances to broad horizons

G Ma, P Sheng - Science advances, 2016‏ - science.org
Within a time span of 15 years, acoustic metamaterials have emerged from academic
curiosity to become an active field driven by scientific discoveries and diverse application …

Polarization-insensitive composite gradient-index metasurface array for microwave power reception

Q Yang, H **ong, JH Deng, BX Wang, WX Peng… - Applied Physics …, 2023‏ - pubs.aip.org
A composite gradient-index metasurface (C-GM) array for microwave power reception
(MPR) operating at 5.8 GHz center frequency was introduced. The array is insensitive to the …

Dispersion tuning and route reconfiguration of acoustic waves in valley topological phononic crystals

Z Tian, C Shen, J Li, E Reit, H Bachman… - Nature …, 2020‏ - nature.com
The valley degree of freedom in crystals offers great potential for manipulating classical
waves, however, few studies have investigated valley states with complex wavenumbers …

Time-periodic stiffness modulation in elastic metamaterials for selective wave filtering: Theory and experiment

G Trainiti, Y **a, J Marconi, G Cazzulani, A Erturk… - Physical review …, 2019‏ - APS
Elastic waveguides with time-modulated stiffness feature a frequency-periodic dispersion
spectrum, where branches merge at multiple integers of half the modulation frequency and …

Breaking the barriers: advances in acoustic functional materials

H Ge, M Yang, C Ma, MH Lu, YF Chen… - National Science …, 2018‏ - academic.oup.com
Acoustics is a classical field of study that has witnessed tremendous developments over the
past 25 years. Driven by the novel acoustic effects underpinned by phononic crystals with …

Efficient nonreciprocal mode transitions in spatiotemporally modulated acoustic metamaterials

Z Chen, Y Peng, H Li, J Liu, Y Ding, B Liang, XF Zhu… - Science …, 2021‏ - science.org
In linear, lossless, time-invariant, and nonbiased acoustic systems, mode transitions are time
reversible, consistent with Lorentz reciprocity and implying a strict symmetry in space-time …

A bloch-based procedure for dispersion analysis of lattices with periodic time-varying properties

J Vila, RK Pal, M Ruzzene, G Trainiti - Journal of Sound and Vibration, 2017‏ - Elsevier
We present a procedure for the systematic estimation of the dispersion properties of linear
discrete systems with periodic time-varying coefficients. The approach relies on the analysis …

Roton-enabled mechanical diode at extremely low frequency

T Yang, Z Duan, X Meng, S Liu… - Journal of Applied …, 2024‏ - asmedigitalcollection.asme.org
This paper presents a refined model for a mechanical diode based on a mass-spring
system. The proposed model utilizes a bilinear spring to construct a frequency converter …

High efficiency and broadband acoustic diodes

C Fu, B Wang, T Zhao, CQ Chen - Applied Physics Letters, 2018‏ - pubs.aip.org
Energy transmission efficiency and working bandwidth are the two major factors limiting the
application of current acoustic diodes (ADs). This letter presents a design of high efficiency …