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Romain Christophe Rémy Fleury

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Publications associées (120)

Low-Profile ESPAR Using Metamaterial-Inspired Structure

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper addresses the 3D nature of traditional Electronically Steerable Parasitic Array Radiators (ESPARs). Additionally, the required distance between the main radiator and the parasitic elements usually affects the antenna's electrical size and the fr ...

2024

Experimental observation of parabolic wakes in thin plates

Romain Christophe Rémy Fleury, Aleksi Antoine Bossart, Janez Rus, Matthieu Francis Malléjac, Benjamin Apffel

Wakes are medium perturbations created by a moving object, such as wave patterns behind boats, or wingtip vortices following an aircraft. Here, we report about an experimental study of an uncharted form of parabolic wakes occurring in media with the group ...

American Physical Society (APS)2024

Topological Acoustics

Romain Christophe Rémy Fleury, Farzad Zangeneh Nejad

Inspired to discoveries in condensed matter systems, topological insulators (TIs) for classical waveWaves systems have been recently unveiled in various platforms. AcousticsAcoustics in particular offers a well-established playground to realize topological ...

Springer Science and Business Media Deutschland GmbH2024

Laser-based ultrasound inspection system

Romain Christophe Rémy Fleury, Janez Rus

A laser-based ultrasound inspection system comprising an object for inspection (1), a laser device for ultrasound generation (3a), a laser device for ultrasound detection (3b), and a coating arrangement (4) including a laser absorbing layer (4a) disposed o ...

2024

Ridge waveguide metamaterial filters

Seyed Mostafa Khosrownejad, Maliheh Khatibi Moghaddam, Romain Christophe Rémy Fleury

Ridge waveguide metamaterial filter comprising at least one ridge waveguide, at least one microwave or millimeter wave metamaterial-filter and at least one transition structure. The metamaterial-filter comprises a host waveguide including a plurality of ra ...

2024

Characterization of a Metamaterial-Enabled Waveguide Diplexer for Ka-Band Satellite Communication Systems

Romain Christophe Rémy Fleury, Robin Frédéric Bonny

This paper presents a novel miniaturized metamaterial-enabled diplexer designed for Ka-band. We introduce a measurement methodology to characterize noncontiguous channels within a waveguide structure. The diplexer efficiently separates receive (17.3-20.2 G ...

Institute of Electrical and Electronics Engineers Inc.2024

Skyrmion Quasi‐Bound States in the Continuum for 3D Light Trapping in Arbitrarily Large Volumes

Romain Christophe Rémy Fleury, Haoye Qin, Qiaolu Chen, Zhechen Zhang

Real‐world resonances face surface‐scaling radiation leakage, hindering light confinement in optically large systems. Conventional bound states in continuum (BICs) challenge this by enabling states with theoretically infinite lifetimes in 2D periodic struc ...

Wiley2024

Disclination states in nonreciprocal topological networks

Romain Christophe Rémy Fleury, Haoye Qin, Qiaolu Chen, Zhechen Zhang

Recently, nonreciprocal two-dimensional unitary scattering networks have gained considerable interest due to the possibility of obtaining robust edge wave propagation in their anomalous topological insulating phase. However, zero-dimensional states in such ...

2024

Wave-momentum shaping for moving objects in heterogeneous and dynamic media

Stefan Rotter, Romain Christophe Rémy Fleury, Bakhtiyar Orazbayev, Matthieu Francis Malléjac

Light and sound waves can move objects through the transfer of linear or angular momentum, which has led to the development of optical and acoustic tweezers, with applications ranging from biomedical engineering to quantum optics. Although impressive manip ...

2024

Topological Photonics: introduction to the feature issue

Romain Christophe Rémy Fleury

We introduce the feature issue of Optical Materials Express on Topological Photonics. ...

Optica Publishing Group2024

Holographic multiplexing metasurface with twisted diffractive neural network

Romain Christophe Rémy Fleury

As the cornerstone of AI generated content, data drives human-machine interaction and is essential for developing sophisticated deep learning agents. Nevertheless, the associated data storage poses a formidable challenge from conventional energy-intensive ...

Nature Research2024

Moving objects in diverse media through wave momentum manipulation

Romain Christophe Rémy Fleury, Bakhtiyar Orazbayev, Matthieu Francis Malléjac

In this paper, we experimentally demonstrate the ability to move an object in disordered and dynamic media by using acoustic waves for transferring linear or angular momentum to the object. In contrast to the remarkable results that have been achieved in o ...

Institute of Electrical and Electronics Engineers Inc.2024

Backpropagation-free Training of Analog AI Accelerators

Romain Christophe Rémy Fleury, Ali Momeni, Matthieu Francis Malléjac

Deep learning has achieved remarkable success in diverse fields in recent years. However, this growth presents significant challenges, particularly in terms of energy consumption during both training and inference phases. While there have been efforts to i ...

Institute of Electrical and Electronics Engineers Inc.2024

GPS Interference Cancellation Using Metamaterials

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper introduces a novel passive method and structure designed to mitigate unwanted interference at the antenna in conventional Global Positioning System (GPS) applications. In contrast to traditional approaches that typically utilize high-impedance s ...

Institute of Electrical and Electronics Engineers (IEEE)2024

Enabling Wide Bandwidth in Substrate-Integrated Waveguide Slot Antennas by Using Low-Index Metamaterials

Romain Christophe Rémy Fleury, Jalaledin Tayebpour, Amir Jafargholi

This paper presents a solution to overcome the inherently limited bandwidth of substrate-integrated waveguide (SIW) slot antennas. It is analytically shown that by decreasing the permittivity of a dielectric loaded slot antenna, the resulting bandwidth inc ...

American Physical Society (APS)2024

GPS Interference Cancellation Using Magneto-dielectric Metamaterials

Romain Christophe Rémy Fleury, Amir Jafargholi

This paper presents a new method and structure to suppress unwanted interference in conventional Global Positioning System (GPS) applications. In contrast to traditional antennas that usually utilize high-impedance structures with limited enhancement or th ...

Institute of Electrical and Electronics Engineers Inc.2024

Anomalous and Chern topological waves in hyperbolic networks

Romain Christophe Rémy Fleury, Aleksi Antoine Bossart, Haoye Qin, Zhechen Zhang

Hyperbolic lattices are a new type of synthetic materials based on regular tessellations in non-Euclidean spaces with constant negative curvature. While so far, there has been several theoretical investigations of hyperbolic topological media, experimental ...

Nature Research2024

Loss-compensated non-reciprocal scattering based on synchronization

Romain Christophe Rémy Fleury

Breaking the reciprocity of wave propagation is a problem of fundamental interest, and a much-sought functionality in practical applications, both in photonics and phononics. Although it has been achieved using resonant linear scattering from cavities with ...

Springer Science and Business Media LLC2024

Reduced Training Data for Laser Ultrasound Signal Interpretation by Neural Networks

Romain Christophe Rémy Fleury, Janez Rus

The performance of machine learning algorithms is conditioned by the availability of training datasets, which is especially true for the field of nondestructive evaluation. Here we propose one reconfigurable specimen instead of numerous reference specimens ...

2024

Experimental observation of topological transition in linear and nonlinear parametric oscillators

Romain Christophe Rémy Fleury, Benjamin Apffel

Parametric oscillators are examples of externally driven systems that can exhibit two stable states with opposite phase depending on the initial conditions. In this work, we propose to study what happens when the external forcing is perturbed by a continuo ...

2024

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