122 citations · 778 across the 40 of their papers we have counts for
9 papers · 1 filter
Anisotropic Cylindrical Waves in a Square Lattice of Acoustic Waveguides
Ioannis Ioannou Sougleridis, Olivier Richoux, Vassos Achilleos +2
We investigate the propagation of cylindrical waves in a square network of acoustic waveguides. We establish, both theoretically and experimentally, the anisotropic dispersion rela…
Gradient catastrophe and Peregrine soliton in nonlinear flexible mechanical metamaterials
Antoine Demiquel, Vassos Achilleos, Georgios Theocharis +1
We explore the generation of extreme wave events in mechanical metamaterials using the regularization of the gradient catastrophe theory developed by A. Tovbis and M. Bertola for t…
Envelope vector solitons in nonlinear flexible mechanical metamaterials
Antoine Demiquel, Vassos Achilleos, Georgios Theocharis +1
In this paper, we employ a combination of analytical and numerical techniques to investigate the dynamics of lattice envelope vector soliton solutions propagating within a one-dime…
Insensitive edge solitons in a non-Hermitian topological lattice
Bertin Many Manda, Vassos Achilleos
In this work, we demonstrate that the synergetic interplay of topology, nonreciprocity and nonlinearity is capable of unprecedented effects. We focus on a nonreciprocal variant of…
Skin modes in a nonlinear Hatano-Nelson model
Bertin Many Manda, Ricardo Carretero-González, Panayotis G. Kevrekidis +1
Non-Hermitian lattices with non-reciprocal couplings under open boundary conditions are known to possess linear modes exponentially localized on one edge of the chain. This phenome…
Acoustic solitons in a periodic waveguide: theory and experiments
Ioannis Ioannou Sougleridis, Olivier Richoux, Vassos Achilleos +3
We study the propagation of high-amplitude sound waves, in the form of pulse-like solitary waves, in an air-filled acoustic waveguide of periodically varying cross section. Our num…
Wave propagation in a strongly disordered 1D phononic lattice supporting rotational waves
A. Ngapasare, G. Theocharis, O. Richoux +2
We investigate the dynamical properties of a strongly disordered micropolar lattice made up of cubic block units. This phononic lattice model supports both transverse and rotationa…
Bright and Gap Solitons in Membrane-Type Acoustic Metamaterials
Jiangyi Zhang, Vicente Romero-García, Georgios Theocharis +3
We study analytically and numerically envelope solitons (bright and gap solitons) in a one-dimensional, nonlinear acoustic metamaterial, composed of an air-filled waveguide periodi…
Acoustic solitons in waveguides with Helmholtz resonators: transmission line approach
V. Achilleos, O. Richoux, G. Theocharis +1
We report experimental results and study theoretically soliton formation and propagation in an airfilled acoustic waveguide side loaded with Helmholtz resonators. Our theoretical a…