Zobrazeno 1 - 10
of 402
pro vyhledávání: '"Pagneux V"'
Autor:
Sougleridis, I. Ioannou, Anastasiadis, A., Richoux, O., Achilleos, V., Theocharis, G., Pagneux, V., Diakonos, F. K.
We report on a direct mapping of acoustic slender waveguides to the one dimensional trimer Su- Schrieffer-Heeger model, with neither chiral nor mirror symmetry. Importantly, we can choose to perform this mapping for either the acoustic velocity or pr
Externí odkaz:
http://arxiv.org/abs/2401.14264
Autor:
Romero-García, V., Jiménez, N., Groby, J. -P., Merkel, A., Tournat, V., Theocharis, G., Richoux, O., Pagneux, V.
Publikováno v:
Phys. Rev. Applied 14, 054055 (2020)
Mirror-symmetric acoustic metascreens producing perfect absorption independently of the incidence side are theoretically and experimentally reported in this work. The mirror-symmetric resonant building blocks of the metascreen support symmetric and a
Externí odkaz:
http://arxiv.org/abs/2007.08393
Autor:
Kiorpelidis, I., Diakonos, F. K., Theocharis, G., Pagneux, V., Richoux, O., Schmelcher, P., Kalozoumis, P. A.
Publikováno v:
Phys. Rev. A 99, 012117 (2019)
We investigate the spectral properties of a class of hard-wall bounded systems, described by potentials exhibiting domain-wise different local symmetries. Tuning the distance of the domains with locally symmetric potential from the hard wall boundari
Externí odkaz:
http://arxiv.org/abs/1809.09139
Publikováno v:
Phys. Rev. A 98, 023838 (2018)
One-dimensional topological edge modes are usually studied considering the interface between two different semi infinite periodic crystals (PCs) with inverted band structure around the Dirac point. Here we consider the case where the two PCs are fini
Externí odkaz:
http://arxiv.org/abs/1712.08763
Publikováno v:
Phys. Rev. Lett. 119, 243904 (2017)
In this work, we study the transmission properties of one dimensional finite periodic systems with $\mathcal{PT}$-symmetry. A simple closed form expression is obtained for the total transmittance from a lattice of N cells, that allows us to describe
Externí odkaz:
http://arxiv.org/abs/1703.07428
Publikováno v:
Phys. Rev. B 95, 144303 (2017)
Effective non-Hermitian Hamiltonians are obtained to describe coherent perfect absorbing and lasing boundary conditions. PT -symmetry of the Hamiltonians enables to design configurations which perfectly absorb at multiple frequencies. Broadened and f
Externí odkaz:
http://arxiv.org/abs/1611.03258
We experimentally report perfect acoustic absorption through the interplay of the inherent losses and transparent modes with high $Q$ factor. These modes are generated in a two-port, one-dimensional waveguide which is side-loaded by isolated resonato
Externí odkaz:
http://arxiv.org/abs/1509.01443
We experimentally and analytically report broadband and narrowband perfect absorption in two different acoustic waveguide-resonator geometries by the mechanism of critical coupling. In the first geometry the resonator (a Helmholtz resonator) is side-
Externí odkaz:
http://arxiv.org/abs/1501.00191
Autor:
Romero-García, V., Jiménez, N., Theocharis, G., Achilleos, V., Merkel, A., Richoux, O., Tournat, V., Groby, J.-P., Pagneux, V.
Publikováno v:
Comptes Rendus. Physique, Vol 21, Iss 7-8, Pp 713-749 (2021)
In this review, we present the results on sub-wavelength perfect acoustic absorption using acoustic metamaterials made of Helmholtz resonators with different setups. Low frequency perfect absorption requires to increase the number of states at low fr
Externí odkaz:
https://doaj.org/article/40367a8c0fc146d3bcb9f9d39bd86dad
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