Elastic waves in anisotropic media can exhibit a power flux that is not collinear with the wave
vector. This has notable consequences for waves guided in a plate. Through laser-ultrasonic …

Polar van der Waals (vdW) crystals, composed of atomic layers held together by vdW forces,
can host phonon polaritons—quasiparticles arising from the interaction between photons in …

In this paper, we investigate the role of the nonlinear response of a material to improve
quantum metrology. We show that the collective optical behavior of an atomic ensemble can …

This paper presents numerical and experimental investigations of negative refraction at the
interface between two mechanical rotator lattices, adding to the recent body of anomalous …

Imaging plays a vital role in enabling the visualization and analysis of objects and
phenomena across various scientific disciplines and industrial sectors, spanning a wide …

Backward acoustic waves are characterized by oppositely directed phase and group
velocities. These waves can exist in isotropic and piezoelectric plates. They can be detected …

Negative refraction in multilayered metal-dielectric metamaterials is usually based on
negative refractive indices or hyperbolic-like isofrequency surfaces. In this study, we reveal …

Invisibility cloaks for flexural waves have mostly been examined in a continuous-wave
regime, while invisibility is likely to deteriorate for short pulses. Here, we propose the …

Mutual scattering arises when multiple waves intersect within a finite scattering object,
resulting in cross interference between the incident and scattered waves. By measuring …

This paper aims at quantitatively understanding the elastic wave scattering due to negative
metamaterial structures under wide-band signals in the time domain. Specifically, we …