Article
Multidisciplinary Sciences
Zhaoxian Chen, Yugui Peng, Haoxiang Li, Jingjing Liu, Yujiang Ding, Bin Liang, Xue-Feng Zhu, Yanqing Lu, Jianchun Cheng, Andrea Alu
Summary: This study overcomes the limitations of traditional acoustic systems by implementing spatiotemporally modulated acoustic metamaterials to support nonreciprocal sound steering, showcasing efficient nonreciprocal sound manipulation through dynamic control of acoustic impedance.
Article
Chemistry, Multidisciplinary
Yihui Wang, Wei Sha, Mi Xiao, Cheng-Wei Qiu, Liang Gao
Summary: This study presents an intelligent design framework for thermal metamaterials using a pre-trained deep learning model. It can achieve the desired functional structures of thermal metamaterials with exceptional speed and efficiency, regardless of arbitrary geometry. This research sets up a novel paradigm for the automatic and real-time design of thermal metamaterials.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yifan Zhu, Nikhil J. R. K. Gerard, Xiaoxing Xia, Grant C. Stevenson, Liyun Cao, Shiwang Fan, Christopher M. Spadaccini, Yun Jing, Badreddine Assouar
Summary: Acoustic holograms with two Fabry-Perot resonant channels per unit cell enable simultaneous modulation of transmitted amplitude and phase at two desired frequencies, providing a new degree of freedom in tailoring holograms encoded in acoustic metamaterials. The study demonstrates the multiplexed acoustic metaholograms at audio and ultrasonic frequencies, showing the potential for technical advances in acoustic metamaterials, architectural acoustics, and medical ultrasound.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Physics, Applied
Shuanglong Liu, Fei Chen, Tian Yang, Robert G. Parker, Pai Wang, Tianzhi Yang
Summary: This article reports an easy-to-make, resonance-based mechanism for achieving negative rotational inertia. The device consists of a heavy inner core, a lightweight outer shell, and rubber connections. The authors theoretically predict and experimentally observe negative rotational inertia in the range of 100-230 Hz. They also investigate the relationship between the bandwidth of negative inertia and the bandgap in a chain of negative-inertia units, revealing a unique property and potential applications in metamaterial designs.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Fubao Yang, Peng Jin, Min Lei, Gaole Dai, Jun Wang, Jiping Huang
Summary: The proposed space-time-coding electromagnetic metasurface introduces the temporal dimension into artificial structure design, expanding its digital application in information processing. However, the absence of temporal dimension in thermal digital metamaterial limits the synergetic modulation of thermal signal in time and space. This study introduces temporal modulation into existing spatially variable thermal coding structures and proposes a space-time thermal binary coding scheme, demonstrating a practical strategy for thermal binary coding and providing a prototype for spatiotemporal regulation of thermal signal.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Chengbo Hu, Jingkai Weng, Yujiang Ding, Bin Liang, Jing Yang, Jianchun Cheng
Summary: This study theoretically proposes and experimentally demonstrates a 3D acoustic hyperlens capable of producing super-resolution imaging for broadband airborne sound. The simple nonresonant metamaterial design ensures tessellation of the curved surface and deep-subwavelength resolution, converting evanescent waves into radially propagating modes based on positive extreme anisotropy. The effectiveness of the mechanism is shown through numerical and experimental results, allowing for 3D magnifying super-resolution imaging of small objects containing subwavelength patterns across a wide frequency range. This research opens up possibilities for designing acoustic super-resolution imaging devices and their application in diverse scenarios.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
X. Fang, M. Li, D. Ramaccia, A. Toscano, F. Bilotti, D. Ding
Summary: Self-adaptive retro-reflective planar Doppler cloak is designed to compensate the Doppler effect of a moving scatterer and maintain a stable radar cross section. It uses space-time modulated metasurfaces for frequency conversion and retro-reflection. This self-adaptive Doppler cloak enhances the undetectability of cloaked moving objects.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Aerospace
Reid Kelly McCargar, Joshua J. Jones, Graeme E. Smith, Joseph Landon Garry
Summary: This article presents measurements of bullets in supersonic flight using a highly Doppler-tolerant pulsed waveform, affirming the waveform's resilience to intrapulse wideband Doppler and interpulse range migration. This enables undegraded high-time-bandwidth-product observations of fast-moving targets with the same computational complexity as standard pulse-Doppler processing.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2021)
Article
Engineering, Civil
Yangbo Li, Yidong Wan, Yan Shen, Xiaochun Lu, Yongdong Meng
Summary: This study demonstrated the synthesis of a polymer with low thermal expansion by blending Zirconium tungstate, resulting in a material with a metal-like coefficient of thermal expansion. The findings verified the ability to design architected metamaterial systems with controllable low thermal expansion, opening up potential applications in various industries.
THIN-WALLED STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Sajad Eslamzadeh, Mohsen Ghaffari-Miab, Bijan Abbasi-Arand
Summary: This paper presents an acoustic cylindrical-to-plane-wave conversion system based on metamaterials, which utilizes a broadband lens and has potential applications in a wide frequency range for sonar systems and biomedical imaging.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Chuanxin Zhang, Xue Jiang, Jiajie He, Ying Li, Dean Ta
Summary: A real-time spatiotemporal communication method based on the rotational Doppler effect is proposed and demonstrated. The information carried in multiplexed orbital-angular-momentum (OAM) channels is transformed into temporal harmonic waveforms and detected by a single sensor. This method enables parallel transmission of complex images with low bit error rate and offers potential for relevant fields.
Article
Optics
Yanwang Zhai, Jingtao Fan, Hui Qiao, Tiankuang Zhou, Jiamin Wu, Qionghai Dai
Summary: The rotational Doppler effect (RDE) of a structured light source carrying orbital angular momentum (OAM) has been improved by utilizing a spiral phase spatial filter (SPSF). The model reveals that a rotating rough surface scatters abundant twisted photons carrying varied OAM values, and the OAM spectrum distribution is modulated by its angular coherence of spatial signature. The method of using SPSF on common surfaces with different autocorrelation structures improves efficiency and robustness for rotator detection.
LASER & PHOTONICS REVIEWS
(2023)
Article
Mechanics
Lianyun Liu, Xiaojie Cheng, Xu Zheng, Yi Qiu, Zhiyong Hao
Summary: This paper proposes an experimental method to study the rotational Doppler shift in acoustic waves carrying OAM using static microphones. The measured results and numerical simulation analysis demonstrate the extreme negative frequency Doppler shift phenomenon.
Article
Optics
Yan Pan, Heng Wang, Yun Shao, Yaodi Pi, Yang Li, Bin Liu, Wei Huang, Bingjie Xu
Summary: A high-rate continuous-variable quantum key distribution (CV-QKD) system based on high-order discrete modulation is experimentally investigated. The results demonstrate the potential application of the high-rate discrete-modulated CV-QKD system for high-speed security communication under tens of kilometers, achieving transmission results and secret key rates comparable to ideal Gaussian modulation.
Article
Optics
J. F. Algorri, F. Dell'Olio, Y. Ding, F. Labbe, V. Dmitriev, J. M. Lopez-Higuera, J. M. Sanchez-Pena, L. C. Andreani, M. Galli, D. C. Zografopoulos
Summary: We investigate a metasurface supporting a silicon-slot quasi-bound state in the continuum (qBIC) mode resonating in the near-infrared spectrum both theoretically and experimentally. The metasurface is composed of circular slots etched in a silicon layer on a sapphire substrate. By reducing the symmetry of the metasurface unit cell, we access the symmetry-protected mode and analyze its properties through finite-element full-wave and eigenfrequency analysis. The measured transmittance spectra confirm the excitation of the investigated qBIC mode with experimental quality factors exceeding 700. The resonant qBIC mode exhibits strong field confinement in the slots, leading to high sensitivity values for refractometry.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Qiao Cheng, Yang Hao, Jack McGhee, William G. Whittow, J. C. Vardaxoglou, Raj Mittra, Shiyu Zhang
Summary: This article proposes a broadband dual circularly polarized reflectarray based on 3-D printed dielectric materials. By adjusting the phases of the orthogonal LP waves and optimizing the feed placement, a wide bandwidth and high gain are achieved.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Yufang Wang, Yuehe Ge, Zhizhang Chen, Xin Liu, Jixiong Pu, Kaiting Liu, Huanyang Chen, Yang Hao
Summary: The study demonstrates a high-efficiency broadband ultrathin metasurface incorporating metallic gratings and double-split-ring resonators. The metasurface has multiple functionalities, generating beams with different orders and vortex beams with various orbital angular momentum modes in both reflection and transmission spaces.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Nanoscience & Nanotechnology
Benjamin Vial, Tom Whittaker, Shiyu Zhang, William G. Whittow, Yang Hao
Summary: This study reports the use of topology optimization to design a bi-focal lens that concentrates the electromagnetic field at different spatial positions depending on the wavelength. Numerical inverse design is utilized to obtain the desired permittivity layout, and the resulting device is 3D printed using low-loss dielectrics. Experimental field mapping demonstrates the local field enhancement ability at distinct locations for two separate frequencies.
Review
Engineering, Multidisciplinary
Ahsan Noor Khan, Young-Ok Cha, Henry Giddens, Yang Hao
Summary: The integration of electronics and biology has led to the emergence of bioelectronics, offering exciting opportunities for therapeutic treatments. Wireless technology is playing a significant role in advancing bioelectronics, enabling noninvasive control and wireless power transfer, with potential for clinical applications.
Article
Materials Science, Multidisciplinary
Young-Ok Cha, Yang Hao
Summary: This study utilizes automated computer tools, such as natural language processing (NLP), to re-examine the future prospects of metamaterials research. By building a fully auto-generated database of 43,678 abstracts related to metamaterials published between 2000 and 2021, the distribution and clustering of each keyword in a hyperdimensional vector space are studied using word embedding. This study not only assesses the popularity and trends of research themes but also predicts the future directions and theme evolutions for selected topics.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Achintha Ihalage, Yang Hao
Summary: The success of machine learning in materials property prediction depends on the representation of materials. This study introduces a new concept called formula graph, which unifies stoichiometric and structure-based material descriptors. A graph neural network model with self-attention mechanism is developed, allowing the transferability of material embeddings between different domains and improving prediction performance and sample efficiency.
Article
Engineering, Electrical & Electronic
Yaling Chen, Long Zhang, Yejun He, Chunxu Mao, Sai-Wai Wong, Wenting Li, Peng Chu, Steven Gao
Summary: This article proposes a substrate integrated waveguide (SIW) H-plane horn antenna loaded with a tapered multistrip transition and dielectric slab, achieving broadband high-gain operation. The broadband characteristic is achieved by loading the tapered multistrip transition, while the dielectric slab enhances the gain. Experimental results demonstrate a wide impedance bandwidth, high-gain operation, and excellent radiation patterns for millimeter-wave applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Multidisciplinary Sciences
Lucas Teoh, Achintha Avin Ihalage, Srooley Harp, Zahra F. Al-Khateeb, Adina T. Michael-Titus, Jordi L. Tremoleda, Yang Hao
Summary: Early detection of traumatic brain injuries is crucial for patient prognosis and survival. This study explores the use of a multiple input, convolutional neural network and LSTM integrated architecture for traumatic injury detection in a murine preclinical model dataset. The proposed deep learning model achieved the best performance and showed promise in detecting brain trauma in mice.
Review
Chemistry, Multidisciplinary
Yasir Saifullah, Yejun He, Amir Boag, Guo-Min Yang, Feng Xu
Summary: Intelligent metasurfaces, with the ability to dynamically manipulate electromagnetic waves, have gained significant importance in recent years. This article reviews the recent progress in the field of intelligent metasurfaces, focusing on tuning mechanisms, hardware designs, and applications. It discusses reconfigurable and programmable metasurfaces, as well as the potential of reconfigurable intelligent surfaces in altering wireless environments. Additionally, it summarizes the progress made in transmitting and reflecting reconfigurable intelligent surfaces that achieve full-space EM wave control. The perspective on the challenges and future directions of intelligent metasurfaces is also provided.
Article
Engineering, Electrical & Electronic
Khaleda Ali, Alessio Brizzi, Ahsan Noor Khan, Yang Hao
Summary: This article presents an analysis of on-body radio channels at millimeter-wave frequencies and proposes solutions to reduce the path loss, particularly at non-line of sight (NLoS) locations. The study conducted at 94 GHz reveals that the presence of textile and thin air between clothing and the human body surface can lower the path loss at NLoS. Additionally, attaching a thin metallic sheet underneath clothing further reduces the path loss.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Yubei He, Cheng-Xiang Wang, Hengtai Chang, Rui Feng, Jian Sun, Wensheng Zhang, Yang Hao, El-Hadi M. Aggoune
Summary: In this paper, a 3-dimensional non-stationary geometry-based stochastic model is proposed for maritime massive MIMO communication systems. A novel beam domain channel model is then proposed, which transforms the corresponding stochastic model from the array domain to the beam domain. Two methods are used to characterize the array non-stationarity, and important channel statistical properties are studied and compared based on the proposed models.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Parvathy Chittur Subramanianprasad, Yihan Ma, Achintha Avin Ihalage, Yang Hao
Summary: The design of metasurface arrays to minimize radar cross-section has been extensively studied. The use of conventional optimization algorithms such as genetic algorithm and particle swarm optimization presents a challenge in terms of computation time, especially for large arrays. This study proposes the application of active learning, a machine learning optimization technique, to significantly speed up the optimization process and obtain similar results compared to genetic algorithm. The active learning strategy outperforms genetic algorithm in terms of computational efficiency, particularly for larger metasurface arrays.
Review
Engineering, Electrical & Electronic
Young-Ok Cha, Achintha Avin Ihalage, Yang Hao
Summary: The past century has seen significant progress in antennas and propagation (A&P) research, bringing about major changes to society and technology. In this article, a natural language processing (NLP) and machine learning (ML) approach is introduced to review A&P research based on large-scale unstructured data, providing meaningful summaries and predictions. Through analyzing 159,000 research papers published between 1981 and 2021, and applying an encoder-decoder LSTM network with integrated attention mechanism, future trends in A&P research are predicted in the form of a Gartner's hype cycle.
IEEE ANTENNAS AND PROPAGATION MAGAZINE
(2023)
Article
Nanoscience & Nanotechnology
Benjamin Vial, Sebastien Guenneau, Yang Hao
Summary: We propose an optimization approach for designing wideband thermal cloaks for objects with large thermal conductivity. The cloak achieves near-perfect cloaking over a finite frequency band and performs well in the time domain, regardless of the initial temperature distribution. Interestingly, it also works fairly well for objects with high thermal conductivity but breaks down for those with low thermal conductivity.
Article
Materials Science, Multidisciplinary
Yihan Ma, Jonas Florentin Kolb, Achintha Avin Ihalage, Andre Sarker Andy, Yang Hao
Summary: Surface symmetry breaking and disorder have been utilized to address issues such as operation bandwidth, unwanted diffraction, and polarization dependence in metasurface designs. However, efficient simulation and optimization of large-scale electromagnetic structures remains challenging. This study presents an interactive learning approach to build meta-atom datasets with mutual coupling effects. A deep learning-based model extracts features from limited known meta-atoms to design aperture-efficient metasurfaces and metalenses at large scales.
ADVANCED PHOTONICS RESEARCH
(2023)
