Article
Engineering, Mechanical
Hyeonbin Ryoo, Wonju Jeon
Summary: A thin acoustic metasurface is proposed for broadband absorption of low-frequency sound using hybrid resonances at multiple target frequencies, achieving lower Q-factors compared to existing absorbing structures. The design procedures allow for perfect sound absorption at multiple target frequencies, opening possibilities for practical applications in noise mitigation of various mechanical systems.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Optics
Guillaume Lavigne, Christophe Caloz
Summary: This study demonstrates that a properly designed bianisotropic metasurface can achieve Brewster transmission at arbitrary angles, providing a deeply subwavelength matching solution for initially mismatched media. The reported generalized Brewster effect represents a significant advancement in optical technology, with the potential to improve the performance of conventional components and facilitate the development of novel devices.
Article
Optics
Ming Kang, Ting Zhang, Bo Zhao, Linshan Sun, Jing Chen
Summary: In this study, it is theoretically shown that the intrinsic chirality of a special point can be determined by the sign of the scattering rate difference. By designing a bianisotropic metasurface, an extreme EP with a definite chirality is demonstrated, along with another EP with the opposite chirality within the same scattering bound on the metasurface. The numerical results align well with the theoretical predictions based on the coupled mode theory, suggesting potential applications in designing unidirectional absorbers and thermal emitters.
Article
Physics, Multidisciplinary
Min Li, Yan Hu, Qiaolu Chen, Hongsheng Chen, Zuojia Wang
Summary: This study presents a method to dynamically control the bianisotropic properties of metasurfaces by deforming the Miura-ori lattice, demonstrating flexible control of asymmetric radiation performance by changing the folding angle.
NEW JOURNAL OF PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Karim Achouri, Olivier J. F. Martin
Summary: This paper provides a detailed discussion on the electromagnetic modeling and classification of polarization converting bianisotropic metasurfaces, exploring the relationship between the polarization effects of metasurfaces and their susceptibility model, scattering parameters, and structural symmetries.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Optics
Liqiao Jing, Xiao Lin, Zuojia Wang, Ido Kaminer, Hao Hu, Erping Li, Yongmin Liu, Min Chen, Baile Zhang, Hongsheng Chen
Summary: Free-electron radiation phenomena have great potential in creating light emission with highly tunable spectra, covering a wide range of frequencies from microwave to X-ray. These phenomena can be applied in various fields such as on-chip light sources, particle accelerators, and medical imaging. Anomalous free-electron radiation has been demonstrated at the microwave regime from gradient bianisotropic metasurfaces, utilizing new degrees of freedom in polarization shaping beyond the common spectral and angular shaping.
LASER & PHOTONICS REVIEWS
(2021)
Article
Physics, Applied
Hao-Wen Dong, Sheng-Dong Zhao, Mourad Oudich, Chen Shen, Chuanzeng Zhang, Li Cheng, Yue-Sheng Wang, Daining Fang
Summary: Unlike electromagnetic and acoustic waves, elastic waves have different wave modes which increase the complexity of the problem but provide more possibilities for wave manipulation. Elastic bulk wave conversion in metamaterials has shown great promise in medical ultrasound and nondestructive testing. Reflective multiple mode-conversion mechanism and metasurface design methodology open up potential for a class of elastic-wave-based devices with promising applications in underwater environments.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Shuaishuai Tong, Chunyu Ren, Weipeng Tang
Summary: An asymmetric sandwich-like material element is proposed for designing bianisotropic metasurface with full-angle high-efficiency anomalous refractive manipulation. Analytical demonstration shows that the sandwich-like structures can exhibit bianisotropic response and meet the impedance matching condition, and the design concept can be realized via space-coiling structures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
M. Albooyeh, V. Asadchy, J. Zeng, M. Rajaee, H. Kazemi, M. Hanifeh, F. . Capolino
Summary: By utilizing the fundamental electromagnetic properties of metasurfaces, we have developed a platform for classifying reciprocal bianisotropic metasurfaces and determining their isotropic, anisotropic, bi-isotropic, and bianisotropic properties. We have provided experimental guidelines for identifying each class using macroscopic scattering parameters, such as reflection and transmission coefficients, under plane wave illumination with linear and/or circular polarization. We have also clarified common confusions in the classification of anisotropic and chiral metasurfaces based on circular dichroism measurements.
Article
Physics, Applied
Xiuyuan Peng, Junfei Li, Chen Shen, Steven A. Cummer
Summary: This paper combines the power flow-conformal design methodology and bianisotropic unit cells to achieve arbitrary wavefront transformation with maximum power efficiency. A transmission-type acoustic metasurface was designed to focus 3000Hz plane wave airborne sound in the near field with theoretically unitary power efficiency, validated through numerical simulation and experiment.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
V Kozlov, D. Vovchuk, P. Ginzburg
Summary: This study proposes a new method to address the issue of concealing targets from radar systems from a signal-processing standpoint.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Applied
Janghoon Kang, Michael R. Haberman
Summary: This article investigates the spatiotemporal modulation of the surface acoustic admittance of a metasurface diffuser to improve sound diffusion. By using mathematical and finite element models, it demonstrates that the effects of spatial periodicity can be mitigated without introducing aperiodic spacing, thus reducing diffuser thickness and improving the diffusivity of the backscattered field.
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
H. Q. Nguyen, Q. Wu, H. Chen, J. J. Chen, Y. K. Yu, S. Tracy, G. L. Huang
Summary: An ultra-broadband acoustic barrier assembled from space-coiling metamaterials supporting two Fano resonances is reported, with additional thin viscous foam layers for acoustic hyper-damping. Experimental results show over 10 dB reduction in noise transmission loss across a specific range, along with unconventional broadband absorption observed in the dampened barrier.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Multidisciplinary Sciences
Qinghua Song, Arthur Baroni, Pin Chieh Wu, Sebastien Chenot, Virginie Brandli, Stephane Vezian, Benjamin Damilano, Philippe de Mierry, Samira Khadir, Patrick Ferrand, Patrice Genevet
Summary: A novel method utilizing vectorial Fourier metasurfaces to decouple and encrypt intensity and polarization information was proposed, enabling customizable optical field distribution and expanding research in optical encryption.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Andrey B. Evlyukhin, Maria A. Poleva, Alexei Prokhorov, Kseniia Baryshnikova, Andrey E. Miroshnichenko, Boris N. Chichkov
Summary: A general strategy for realizing electric and magnetic quasi-trapped modes at the same spectral position is presented, allowing switching between the modes by changing the polarization of incident light. The strategy is based on two stages: determining conditions for trapped modes and exciting them by introducing weakness in nanoparticles, enabling control and localization of optical energy at sub-wavelength scale.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
YeonJoon Cheong, K. Alex Shorter, Bogdan-Ioan Popa
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2019)
Article
Physics, Multidisciplinary
Aritra Sasmal, Nathan Geib, Bogdan-Ioan Popa, Karl Grosh
NEW JOURNAL OF PHYSICS
(2020)
Article
Instruments & Instrumentation
Hyung-Suk Kwon, Bogdan Epureanu, Bogdan-Ioan Popa
Summary: Recent research has focused on developing smart metamaterials with programmable acoustic properties, but past designs have only demonstrated the ability to tune small samples composed of at most few dozen cells. This work introduces a method to create ultrasonic metamaterials programmable on very large macroscopic scales.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Physics, Applied
Yuxin Zhai, Hyung-Suk Kwon, Bogdan-Ioan Popa
Summary: This research introduces a method to design omnidirectional and broadband anomalous acoustic reflectors using nonresonant active scatterers, which can manipulate wave-vector components in a broadband manner for arbitrary sound directions. Experimental results show that active scatterers can change the metasurface geometry while preserving the device's functionality.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Applied
Dylan A. Kovacevich, Bogdan-Ioan Popa
Summary: In this experiment, an adaptive 2D acoustic metamaterials is demonstrated, in which the effective bulk modulus can be precisely tuned by adjusting the transfer function between sensors and drivers. The material shows high scalability and is capable of producing negative, fractional, and large effective bulk modulus as needed.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
YeonJoon Cheong, Hyung-Suk Kwon, Bogdan-Ioan Popa
Summary: The paper introduces a method of extracting material parameters of small samples using convolutional neural networks trained to learn the mapping between far-field echoes and the material parameters. The trained networks with synthetic data can accurately estimate the material properties of small samples, opening a new avenue for acoustic sensing techniques.
FRONTIERS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Yuxin Zhai, Hyung-Suk Kwon, Yunseok Choi, Dylan Kovacevich, Bogdan-Ioan Popa
Summary: Convolutional neural networks can interpret diffracted waves and learn the mapping between scattered fields and effective material parameters. It is a powerful tool for non-invasive diagnostics and dynamic characterization of metamaterials, providing valuable insights into the dynamic behavior of matter.
COMMUNICATIONS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
YeonJoon Cheong, Bogdan-Ioan Popa
Summary: This paper introduces a paradigm for acoustic imaging using a metasurface to convert acoustic waves into light captured by optical cameras. Compared to traditional methods, this approach offers larger acoustical apertures and lower complexity, providing higher resolution images.
Article
Materials Science, Multidisciplinary
Nathan Geib, Aritra Sasmal, Zhuzhu Wang, Yuxin Zhai, Bogdan-Ioan Popa, Karl Grosh
Summary: This paper introduces a new nonlocal active metamaterial architecture that utilizes a purely active approach to tailor the acoustic field. The analytical closed-form equations describing the acoustic properties allow for engineering extremely nonreciprocal wave transmission. The system's remarkable flexibility is demonstrated through electronic tuning of acoustic isolation characteristics, highlighting the expansive design space uncovered by this approach.
Article
Materials Science, Multidisciplinary
Yuxin Zhai, Hyung-Suk Kwon, Bogdan-Ioan Popa