Search Results - "CHESNEL, LUCAS"

Trapped modes and reflectionless modes as eigenfunctions of the same spectral problem by Dhia, Anne-Sophie Bonnet-Ben, Chesnel, Lucas, Pagneux, Vincent

“…We consider the reflection–transmission problem in a waveguide with obstacle. At certain frequencies, for some incident waves, intensity is perfectly…”
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Exact zero transmission during the Fano resonance phenomenon in non-symmetric waveguides by Chesnel, Lucas, Nazarov, Sergei A.

“…We investigate a time-harmonic wave problem in a waveguide. We work at low frequency so that only one mode can propagate. It is known that the scattering…”
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Acoustic passive cloaking using thin outer resonators by Chesnel, Lucas, Heleine, Jérémy, Nazarov, Sergei A.

“…We consider the propagation of acoustic waves in a 2D waveguide unbounded in one direction and containing a compact obstacle. The wavenumber is fixed so that…”
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A numerical approach for the Poisson equation in a planar domain with a small inclusion by Chesnel, Lucas, Claeys, Xavier

“…We consider the Poisson equation in a domain with a small inclusion. We present a simple numerical method, based on asymptotic analysis, which allows to…”
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Design of an acoustic energy distributor using thin resonant slits by Chesnel, Lucas, Nazarov, Sergei A

“…We consider the propagation of time harmonic acoustic waves in a device with three channels. The wave number is chosen such that only the piston mode can…”
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Acoustic passive cloaking using thin outer resonators by Chesnel, Lucas, Heleine, Jérémy, Nazarov, Sergei A

“…We consider the propagation of acoustic waves in a 2D waveguide unbounded in one direction and containing a compact obstacle. The wavenumber is fixed so that…”
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Bilaplacian problems with a sign-changing coefficient by Chesnel, Lucas

“…We investigate the properties of the operator Δ(σΔ·):H02(Ω)→H−2(Ω), where σ is a given parameter whose sign can change on the bounded domain Ω. Here, H02(Ω)…”
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Exact zero transmission during the Fano resonance phenomenon in non symmetric waveguides by Chesnel, Lucas, Nazarov, Sergei A

“…We investigate a time-harmonic wave problem in a waveguide. We work at low frequency so that only one mode can propagate. It is known that the scattering…”
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T-coercivity and continuous Galerkin methods: application to transmission problems with sign changing coefficients by Chesnel, Lucas, Ciarlet, Patrick

“…To solve variational indefinite problems, one uses classically the Banach–Nečas–Babuška theory. Here, we study an alternate theory to solve those problems:…”
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From zero transmission to trapped modes in waveguides by Chesnel, Lucas, Pagneux, Vincent

“…We consider the time-harmonic scattering wave problem in a 2D waveguide at wavenumber $k$ such that one mode is propagating in the far field. In a first step,…”
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Surface waves in a channel with thin tunnels and wells at the bottom: non-reflecting underwater tomography by Chesnel, Lucas, Nazarov, Sergei A, Taskinen, Jari

“…Asymptotic Analysis, 2020 We consider the propagation of surface water waves in a straight planar channel perturbed at the bottom by several thin curved…”
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Inside-outside duality with artificial backgrounds by Audibert, Lorenzo, Chesnel, Lucas, Haddar, Houssem

“…We use the inside-outside duality approach proposed by Kirsch-Lechleiter to identify transmission eigenvalues associated with artificial backgrounds. We prove…”
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Spectrum of the Laplacian with mixed boundary conditions in a chamfered quarter of layer by Chesnel, Lucas, Nazarov, Sergei A., Taskinen, Jari

“…We investigate the spectrum of a Laplace operator with mixed boundary conditions in an unbounded chamfered quarter of layer. This problem arises in the study…”
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Oscillating behaviour of the spectrum for a plasmonic problem in a domain with a rounded corner by Chesnel, Lucas, Claeys, Xavier, Nazarov, Sergei A

“…We investigate the eigenvalue problem $-\text{div}(\sigma \nabla u) = \lambda u\ (\mathscr{P})$ in a 2D domain $\Omega$ divided into two regions…”
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Spectrum of the Laplacian with mixed boundary conditions in a chamfered quarter of layer by Chesnel, Lucas, Nazarov, Sergei A., Taskinen, Jari

“…We investigate the spectrum of a Laplace operator with mixed boundary conditions in an unbounded chamfered quarter of layer. This problem arises in the study…”
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Abnormal acoustic transmission in a waveguide with perforated screens by Chesnel, Lucas, Nazarov, Sergei A.

“…We consider the propagation of the piston mode in an acoustic waveguide obstructed by two screens with small holes. In general, due to the features of the…”
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INVISIBILITY AND PERFECT REFLECTIVITY IN WAVEGUIDES WITH FINITE LENGTH BRANCHES by CHESNEL, LUCAS, NAZAROV, SERGEI A., PAGNEUX, VINCENT

“…We consider a time-harmonic wave problem, appearing, for example, in water-wave theory, in acoustics, or in electromagnetism, in a setting such that the…”
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Trapped modes and reflectionless modes as eigenfunctions of the same spectral problem by Dhia, Anne-Sophie Bonnet-Ben, Chesnel, Lucas, Pagneux, Vincent

“…We consider the reflection–transmission problem in a waveguide with obstacle. At certain frequencies, for some incident waves, intensity is perfectly…”
Get full text

Spectrum of a diffusion operator with coefficient changing sign over a small inclusion by Chesnel, Lucas, Claeys, Xavier, Nazarov, Sergei A

“…We study a spectral problem $(\mathscr{P}^{\delta})$ for a diffusion like equation in a 3D domain $\Omega$. The main originality lies in the presence of a…”
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Perfect transmission invisibility for waveguides with sound hard walls by Dhia, Anne-Sophie Bonnet-Ben, Chesnel, Lucas, Nazarov, Sergei A

“…We are interested in a time harmonic acoustic problem in a waveguide with locally perturbed sound hard walls. We consider a setting where an observer generates…”
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