Publications de Romain Christophe Rémy Fleury

Disorder-assisted real–momentum topological photonic crystal

Romain Christophe Rémy Fleury, Haoye Qin, Ji Zhou, Bo Li

Topological defects and disorder counteract each other. Intuitively, disorder is considered detrimental, requiring efforts to mitigate its effects in conventional topological photonics. We propose a counter-intuitive approach that exploits a real–momentum ...

Springer Science and Business Media LLC2025

Experimental demonstration of a space-time-modulated airborne acoustic circulator

Romain Christophe Rémy Fleury, Matthieu Francis Malléjac

Achieving strongly nonreciprocal scattering in compact linear acoustic devices is a challenging task. One possible solution is the use of time-modulated resonators; however, their implementation in the realm of audible airborne acoustics is typically hinde ...

American Physical Society (APS)2025

Active control of electroacoustic resonators in the audible regime: control strategies and airborne applications

Romain Christophe Rémy Fleury, Hervé Lissek, Maxime Volery, Matthieu Francis Malléjac

Passive sound mitigation techniques have garnered attention whether for absorption, isolation, reverberation or new wave phenomena observation. In parallel, a wide range of research has been devoted to active control strategies, which complement passive te ...

Springer Science and Business Media LLC2025

Observation of amplitude-driven nonreciprocity for energy guiding

Romain Christophe Rémy Fleury, Hervé Lissek, Mathieu François Padlewski

The non-Hermitian skin effect is an intriguing physical phenomenon, in which all eigenmodes of a non-Hermitian lattice become localized at boundary regions. While such an exotic behavior has been demonstrated in various physical platforms, most realization ...

American Physical Society (APS)2025

Motion of a floating sphere pulled by a string and induced flows

Romain Christophe Rémy Fleury, Benjamin Apffel

We study in this article the motion of a floating ball attached to a soft string set in circular motion through its other end. Although simple, the system exhibits rich dynamics that we investigate experimentally and theoretically. At low rotation speeds, ...

2025

Nonlocal metamaterials and metasurfaces

Romain Christophe Rémy Fleury

The aim of rationally designed composites called metamaterials or metasurfaces is to achieve effective properties that go beyond those of their constituent parts. For periodic architectures, the design can draw on concepts from solid-state physics, such as ...

Springer Science and Business Media LLC2025

Loop Antenna for Wi-Fi 6/6E Application

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper introduces a horizontally polarized, low-profile loop antenna. The antenna features a printed circular segmented loop loaded with capacitor varactors. By adjusting the capacitive varactors, the antenna has a broadband impedance bandwidth with a ...

Institute of Electrical and Electronics Engineers2025

The 2024 Acoustic Metamaterials Roadmap

Romain Christophe Rémy Fleury

Today, acoustic metamaterials form a core area of metamaterial research. They offer bespoke wave control, achievable through their rationally designed structure and are at the forefront of metamaterial applications and commercialisation. They find purpose ...

IOP Publishing2025

Floquet topological physics in photonics

Romain Christophe Rémy Fleury, Haoye Qin

Floquet topological physics, an area exploring periodically driven systems and leveraging degrees of freedom in the temporal dimension, has opened new avenues in photonics by enabling the creation of novel topological phases, new control mechanisms, and in ...

Optica Publishing Group2025

Practical realization of chiral nonlinearity for strong topological protection

Romain Christophe Rémy Fleury, Hervé Lissek, Mathieu François Padlewski, Xinxin Guo

Nonlinear topology has been much less inquired compared to its linear counterpart. Existing advances have focused on nonlinearities of limited magnitudes and fairly homogeneous types. As such, the realizations have rarely been concerned with the requiremen ...

Stichting SciPost2025