Article
Physics, Applied
Hasna Kourchi, Simon Bernard, Farid Chati, Fernand Leon
Summary: Reciprocal metagratings consisting of brass cylinders arranged in an optimized pattern achieved highly efficient asymmetrical transmission for underwater acoustic waves. When illuminated from one side, the structure transmitted nearly all incident energy towards a 45° angle, while acting as a near perfect reflector when illuminated from the other side. This device holds promise for applications in underwater acoustics or medical ultrasounds.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Yazhu Bai, Ailing Song, Chaoyu Sun, Yanxun Xiang, Fu-Zhen Xuan
Summary: In this paper, we propose a reconfigurable acoustic coding metagrating composed of rotatable open-ended round tubes for realizing broadband sound focusing with tunable focus. The proposed metagrating can precisely manipulate the focus by alternating the coding arrangements. Our work provides promising applications in acoustic imaging, medical ultrasound treatment, and nondestructive testing.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
Kaveripakam Sathish, Monia Hamdi, Ravikumar Chinthaginjala Venkata, Mohammad Alibakhshikenari, Manel Ayadi, Giovanni Pau, Mohamed Abbas, Neeraj Kumar Shukla
Summary: This research focuses on the reflection of acoustic waves off fluid-solid surfaces. It aims to study the impact of material physical qualities on acoustic attenuation under oblique incidence across a wide frequency range. The research generates reflection coefficient curves by adjusting the porousness and permeability of the poroelastic solid and explores the pseudo-Brewster angle shift and reflection coefficient minimum dip. The findings reveal that the propagation medium significantly influences the shape of the reflection coefficient curve, while permeability, porosity, and frequency have relatively less impact on the pseudo-Brewster angle and curve minima.
Article
Physics, Applied
Qiannan Wu, Haohao Chen, Yanyan Cao, Shan Zhu, Baoyin Sun, Yadong Xu
Summary: In this work, we designed and studied a dielectric phase-gradient metagrating (DPGM) with SiGe that enables negative refraction for incident light in the visible band. The wide incident angle range and broadband response from 400 nm to 470 nm are achieved due to tolerances in the metasurface design. An angularly asymmetric transmission phenomenon was observed in the designed DPGM, with the physical mechanism behind the phenomenon revealed. These results pave the way for achieving negative refraction in visible frequencies.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Applied
Shuaishuai Tong, Chunyu Ren, Jun Tao, Lixun Jiang
Summary: This paper presents a method for designing, realizing, and measuring a flattened focal surface underwater acoustic Luneburg lens. The lens is designed using the quasi-conformal transformation technique and constructed with metamaterials based on air-filled photosensitive resin. Numerical simulations and experimental studies demonstrate that the flattened lens has excellent focusing performance over a broad frequency band and can potentially be applied in biomedical imaging, underwater acoustic sensing, and communication.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Applied
Fuyin Ma, Linbo Wang, Pengyu Du, Chang Wang, Jiu Hui Wu
Summary: This study proposes a 3D omnidirectional underwater acoustic concentrator based on the concept of an acoustic prison, which enhances underwater broadband sound signals. The concentrator utilizes non-resonant multiple reflection characteristics for a wide working frequency bandwidth. It has a simple structure and can achieve omnidirectional signal enhancement in a 3D space. Additionally, its working frequency band can be changed through size scaling for convenience in engineering applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Chuanbao Liu, Jingjin He, Ji Zhou, Jianchun Xu, Ke Bi, Junhong Chen, Lijie Qiao, Yang Bai
Summary: The paper demonstrates the use of metagratings with asymmetric grooves to achieve broadband and high-efficiency anomalous reflection, with bipartite and tripartite metagratings designed to optimize abnormal reflection across wide incident angles. The structures achieve efficient reflection over broad bands and angles, showcasing potential for high-efficiency and extreme wave manipulation applications.
ANNALEN DER PHYSIK
(2021)
Article
Materials Science, Multidisciplinary
Ailing Song, Chaoyu Sun, Yanxun Xiang, Fu-Zhen Xuan
Summary: Researchers have designed a simple acoustic metasurface with periodic grooves that can split an incident beam into two or three reflected beams. By changing the groove parameters, the amplitudes and power flows of the reflected beams can be manipulated. The perfect two- and three-beam splitting performances based on local power conservation are demonstrated through theoretical analysis and numerical simulations, providing a simple method for designing acoustic beam splitters with extensive applications in acoustic sensing and communication.
FRONTIERS IN MATERIALS
(2023)
Article
Physics, Applied
Fuyin Ma, Hao Zhang, Pengyu Du, Chang Wang, Jiu Hui Wu
Summary: A sub-wavelength underwater acoustic metasurface unit was designed, and a gradient-index three-dimensional planar underwater acoustic lens was constructed by arranging multiple units. An acoustic concentrator that enhances sound energy was also proposed.
APPLIED PHYSICS LETTERS
(2022)
Article
Robotics
Jae Won Choi, Aseem Borkar, Andrew C. Singer, Girish Chowdhary
Summary: The study presents an underwater localization system for medium-sized Autonomous Underwater Vehicles (AUVs) utilizing broadband wireless acoustic communication, which can achieve high localization accuracy by resolving multipath and Doppler distortion through aggressive signal processing.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2022)
Article
Computer Science, Information Systems
Filippo Campagnaro, Nicola Toffolo, Michele Zorzi
Summary: The characteristics of the underwater acoustic channel are affected by various factors. In order to evaluate the functionality of an acoustic network before actual deployment, the research community often uses lookup tables based on experimental data to simulate the acoustic channel. However, this method is limited to a single channel realization and cannot fully assess the acoustic network under different conditions.
Article
Acoustics
Shande Li, Xiaoxun Wu, Jinxiu Duan, Shuai Yuan, Cun Wang, Yane Ma, Zhifu Zhang
Summary: A composite matching layer with anti-reflection characteristics composed of periodically arranged scatters is proposed for broadband scattering reduction, showing potential for acoustic imaging equipment and acoustic stealth. The complete theoretical model developed based on effective medium theory and transfer matrix method is verified by the finite element method, demonstrating effective scattering reduction at broadband frequencies.
SHOCK AND VIBRATION
(2021)
Article
Nanoscience & Nanotechnology
Ku Im, Q-Han Park
Summary: The mechanism of perfect anti-reflection for acoustic waves is presented using nonlocal metamaterials to compensate for impedance mismatch. The characteristics of spatio-temporal dispersion are analyzed and the issue of total internal reflection is addressed. The practical design of the nonlocal layer using metamaterials is explained, and its omni-directional frequency-independent behavior is confirmed through numerical calculations.
Article
Engineering, Mechanical
Yanni Zhang, Li Cheng
Summary: An ultra-thin meta-absorber design is proposed to achieve broadband low-frequency underwater sound absorption by inserting circular-elastic-plate scatterers (CPSs) into an elastomer matrix. The design enables high and quasi-perfect sound absorption at multiple frequencies and a broad low-frequency range. Experimentally confirmed, this research offers a novel and effective solution for broadband low-frequency underwater sound absorption.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Acoustics
Baoguo Yuan, Jiyu Liu, Houyou Long, Ying Cheng, Xiaojun Liu
Summary: This work proposes a scheme and demonstrates a planar acoustic Luneburg lens that can focus broadband sound without aberration. The refractive indexes of the lens are obtained from acoustic metamaterials, and the lens is fabricated using 3D printing technology. The experimental results agree well with numerical simulations, and the lens is further utilized to construct a wide-angle acoustic reflector.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Biophysics
Simon Bernard, Joannes Schneider, Peter Varga, Pascal Laugier, Kay Raum, Quentin Grimal
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2016)
Article
Mathematics, Applied
Simon Bernard, Guillaume Marrelec, Pascal Laugier, Quentin Grimal
Article
Acoustics
Siavash Kazemirad, Simon Bernard, Samuel Hybois, An Tang, Guy Cloutier
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2016)
Article
Acoustics
Simon Bernard, Siavash Kazemirad, Guy Cloutier
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2017)
Article
Acoustics
Simon Bernard, Guy Cloutier
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2017)
Article
Multidisciplinary Sciences
Pol Grasland-Mongrain, Ali Zorgani, Shoma Nakagawa, Simon Bernard, Lia Gomes Paim, Greg Fitzharris, Stefan Catheline, Guy Cloutier
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2018)
Article
Acoustics
Simon Bernard, Quentin Grimal, Pascal Laugier
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2014)
Article
Engineering, Biomedical
Simon Bernard, Quentin Grimal, Pascal Laugier
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2013)
Article
Engineering, Electrical & Electronic
Kailiang Xu, Guillaume Marrelec, Simon Bernard, Quentin Grimal
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2019)
Article
Engineering, Biomedical
Marie Semaan, Pierric Mora, Simon Bernard, Franck Launay, Cedric Payan, Philippe Lasaygues, Martine Pithioux, Cecile Baron
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2019)
Article
Engineering, Biomedical
Simon Bernard, Vadim Monteiller, Dimitri Komatitsch, Philippe Lasaygues
PHYSICS IN MEDICINE AND BIOLOGY
(2017)
Proceedings Paper
Acoustics
Xiran Cai, Simon Bernard, Pascal Laugier, Quentin Grimal, Johannes Schneider, Peter Varga, Kay Raum
2015 6TH EUROPEAN SYMPOSIUM ON ULTRASONIC CHARACTERIZATION OF BONE (ESUCB)
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
Simon Bernard, Quentin Grimal, Pascal Laugier
2012 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS)
(2012)
Proceedings Paper
Engineering, Electrical & Electronic
Simon Bernard, Quentin Grimal, Sylvain Haupert, Pascal Laugier
2011 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS)
(2011)