Article
Chemistry, Physical
Reza Dehbashi, Taras Plakhotnik, Timo A. Nieminen
Summary: This paper introduces the use of tuned near-zero-index materials for subwavelength projection for the first time. A novel structure composed of a two-layer slab is proposed for long-distance projection of closely spaced objects with subwavelength separation. By adjusting the relationship between the near-zero-index material and the high-index dielectric slab, clear image projection is achieved.
Article
Physics, Applied
Rui Yang, Xiaodong Zhang, Gang Wang
Summary: This paper proposes a hybrid acoustic cloaking technology composed of binary splitting metasurfaces (BSMs) and near-zero-index metamaterials (NZIMs). The BSMs form the cloaking effect by diffracting the incident waves around the obstacle, while NZIMs transfer the waves to and control the emergent waves from the BSMs. The hybrid cloaking is simple in structure and can achieve better efficiency through an optimization method.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Qingdong Yang, Yi Wang, Jinhui Shi, Changxu Liu, Shuang Zhang
Summary: This study proposes a novel method for achieving arbitrary power distribution by leveraging the unique properties of an Epsilon Near Zero (ENZ) environment. It shows that power from a single source can be transferred to multiple receivers inside an ENZ medium by modifying the optical properties of the receivers. This approach eliminates the need for complex configurations and communications and enables efficient energy transfer.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Tomasz Stefaniuk, Luke H. Nicholls, R. Margoth Cordova-Castro, Mazhar E. Nasir, Anatoly Zayats
Summary: Ultrashort optical pulses play a vital role in various fields and metamaterials provide a new avenue for controlling their characteristics. In this study, an epsilon-near-zero metamaterial is used to switch from sub- to superluminal pulse propagation by controlling the angle of illumination. The amplitude and phase of the pulses can also be controlled through dispersion management.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Srijan Datta, Lalita Upda
Summary: This paper presents a novel negative index metamaterial (NIM) lens imaging sensor system for subwavelength microwave nondestructive evaluation (NDE) using homodyne detection measurements. The system provides a simple, low-cost, and highly sensitive imaging solution that can overcome the diffraction-limited resolution at far-field working distances. The study demonstrates the unique focus-scanning capability of NIM lenses for target localization without complex tuning mechanisms.
NDT & E INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Ting Hu, Qi Wei, Xing-Feng Zhu, Jie Yao, Da-Jian Wu
Summary: The proposed acoustic anti-parity-time (A-PT) symmetric structure demonstrates extraordinary scattering properties, achieving acoustic coherent perfect absorption and equivalent laser effects in the symmetric phase of the scattering matrix. This structure may facilitate further experimental realizations and offer an alternative approach to design acoustic functional devices.
Article
Chemistry, Multidisciplinary
Taewoo Ha, Daehan Yoo, Chaejeong Heo, Ferran Vidal-Codina, Ngoc-Cuong Nguyen, Kyung Ik Sim, Sang Hyun Park, Wujoon Cha, Sungsu Park, Jaime Peraire, Teun-Teun Kim, Young Hee Lee, Sang-Hyun Oh
Summary: This study demonstrates a subwavelength terahertz resonance imaging (STRING) technique that achieves ultra-sensitive molecular fingerprinting by combining local field enhancement and near-field effects. The results show that the STRING platform could enable the practical and sensitive detection and imaging of molecules and nanoparticles.
Article
Optics
Kishwar Ali, Aqeel A. Syed, Waleed Iqbal Waseer, Qaisar A. Naqvi
Summary: This paper examines the Goos-Hanchen effect for near-zero index metamaterials using fractional dual fields as the excitation source. The behavior of reflection coefficient, phase, and GH effect for ENZ/MNZ metamaterial is analyzed, considering both lossless and lossy materials. The impact of fractional parameter variation on these quantities is carefully observed.
Article
Physics, Applied
Krishna Chand Maurya, Animesh Bhui, Kanishka Biswas, Bivas Saha
Summary: The translated passage discusses the importance and feasibility of using naturally occurring bulk materials for achieving hyperbolic photonic dispersion, as well as the potential of utilizing properties modulation using homologous materials.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Chuanjie Hu, Shuwen Xue, Yuhang Yin, Zhanlei Hao, Yangyang Zhou, Huanyang Chen
Summary: In this Letter, the acoustic imaging properties of a three-dimensional Maxwell's fish-eye lens (3D-MFEL) based on the solid immersion mechanism are explored. The results show that the 3D-MFEL can achieve super-resolution imaging without chromatic aberration. Furthermore, the introduction of vortex waves into the 3D-MFEL allows for the exploration of super-resolution imaging properties in reconstructing vortex waves.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Zhiwei Guo, Yiran Jian, Xian Wu, Fusheng Deng, Lijuan Dong, Hong Chen
Summary: The recent advancements in linear-crossing metamaterials (LCMMs) have attracted significant attention due to their ability to control and enhance light-matter interactions, such as negative refraction, filters, and super-lenses, through novel linear dispersion. However, the limited working frequency range remains a major constraint for LCMMs. In this study, we propose two methods to realize multiple linear-crossing metamaterials (MLCMMs) and demonstrate their unique beam splitting and directional refraction properties at different frequencies. This research not only provides a new platform for fundamental LCMM studies but also facilitates broadband applications.
FRONTIERS IN MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Wenjie Ji, Jie Luo, Hongchen Chu, Xiaoxi Zhou, Xiangdong Meng, Ruwen Peng, Mu Wang, Yun Lai
Summary: By using epsilon-near-zero materials as claddings, the crosstalk between adjacent waveguides in photonic integrated circuits can be effectively prevented, leading to ultra-compact waveguide systems with extremely thin thickness.
Article
Multidisciplinary Sciences
Alessandro Tuniz, Boris T. Kuhlmey
Summary: This article introduces a new imaging method that achieves non-invasive super-resolution imaging by selectively amplifying evanescent waves, allowing for sub-wavelength image resolution.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Tianqiang Zhang, Jing Zhao, Yao Guo, Xiaopeng Zhao
Summary: The study focuses on achieving high-gain omnidirectional patch antenna with low profile, by utilizing a broadband near-zero-index metamaterial (NZIM) to enhance antenna gain. The results demonstrate that using NZIM can increase the horizontal gain of antennas with a low-profile structure size.
IET MICROWAVES ANTENNAS & PROPAGATION
(2021)
Article
Optics
Qiannan Wu, Jianyang Wang, Baoyin Sun, Yangyang Fu, Yadong Xu
Summary: This paper proposes a new mechanism for obtaining optical super-resolution based on anisotropic near-zero index metamaterials (AZIMs). The research shows that AZIMs can achieve perfect transmission of electromagnetic energy and realize a super-resolution lens. Additionally, the performance of super-resolution imaging is not sensitive to loss and impedance mismatching, as analytically and numerically demonstrated.
Article
Physics, Multidisciplinary
Qilin Duan, Ying Chen, Huanyang Chen
Summary: This paper designs self-collimation, beam splitting, and negative refraction effects in photonic crystals based on metallic pairs, achieving a broadband and wide-angle self-collimation effect, beam splitting effect, and flat lens effect.
Article
Physics, Multidisciplinary
Tongtong Song, Jie Luo, Yun Lai
Summary: This study demonstrates a potential approach to achieve zero-spacing photonic waveguides by designing pure-dielectric photonic crystal waveguides with shifted spatial dispersion and arranging them with normal dielectric waveguides alternately. This finding opens up a new avenue for ultra-compact photonic waveguides and circuits with 100% space utilization efficiency.
Article
Physics, Applied
Xudong He, Jin Chen, Mingji Chen, Hongchen Chu, Yun Lai, Daining Fang
Summary: This paper proposes a 3D-printed ultra-broadband planar Luneburg lens composed of periodic gradient structures, with a large operating frequency range. It demonstrates high efficiency achromatic sub-diffraction focusing and highly directive far-field radiation pattern.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Chenkai Liu, Jie Luo, Xiaozhou Liu, Yun Lai
Summary: We numerically demonstrate a general method to achieve acoustic high absorption in water with a wide range of incident angles and a broad frequency bandwidth. By engineering multilayer solid composites to be perfectly impedance matched with water and adding a proper loss factor, sound waves can be gradually dissipated and high absorption can be realized. This method is robust and adaptive to a broad range of material parameters.
PHYSICAL REVIEW APPLIED
(2022)
Article
Acoustics
Qi Wang, Jun Lan, Zhaoyu Deng, Yun Lai, Xiaozhou Liu
Summary: In this study, a heterogeneous structure acoustic leaky-wave antenna (LWA) is proposed to achieve spatial directional radiation and acoustic source localization. The designed antenna has unique frequency-scanning characteristics for directional radiation of sound waves with diverse incident frequencies. Additionally, it exhibits explicit directional frequency characteristics for spatial acoustic source localization, showing potential applications in high-precision acoustic source localization.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Bo Xiong, Yu Liu, Yihao Xu, Lin Deng, Chao-Wei Chen, Jia-Nan Wang, Ruwen Peng, Yun Lai, Yongmin Liu, Mu Wang
Summary: By introducing engineered noise to the precise solution of Jones matrix elements, we have surpassed the fundamental limit of polarization multiplexing capacity of metasurfaces. Through experiments, we have achieved up to 11 independent holographic images using a single metasurface illuminated by visible light with different polarizations, which is the highest reported capacity for polarization multiplexing. With the combination of position multiplexing, the metasurface is capable of generating 36 distinct images, forming a holographic keyboard pattern. This discovery opens up new possibilities for high-capacity optical display, information encryption, and data storage.
Article
Crystallography
Qinglei Zeng, Shenlian Gao, Yun Lai, Xiaozhou Liu
Summary: In this paper, we demonstrate the remarkable improvement in the directionality of acoustic radiation at low frequencies by using acoustic metamaterials arranged as an array of quadrupoles, compared with previous metamaterials arranged as monopole and dipole structures. The directivity can be adjusted by changing the characteristic parameter and symmetry of the structure, providing a flexible method of adjusting radiation directions. Furthermore, the directionality can be further improved by constructing a linear array. This work establishes the control of acoustic radiation via quadrupolar metamaterials.
Article
Optics
Shuai Lin, Hao Luo, Hainan He, Hongchen Chu, Yun Lai
Summary: In this work, broadband binary-reflection-phase metasurfaces with undistorted transmission wavefront are realized by leveraging mirror symmetry in the metasurface design. The cross-polarized reflection can be flexibly manipulated without distorting the wavefront in transmission by designing the binary-phase pattern induced in the cross-polarized reflection. The experimental validation of reflected-beam splitting and undistorted transmission wavefront in a broad bandwidth from 8 GHz to 13 GHz is presented.
Article
Nanoscience & Nanotechnology
Wenjie Ji, Jie Luo, Hongchen Chu, Xiaoxi Zhou, Xiangdong Meng, Ruwen Peng, Mu Wang, Yun Lai
Summary: By using epsilon-near-zero materials as claddings, the crosstalk between adjacent waveguides in photonic integrated circuits can be effectively prevented, leading to ultra-compact waveguide systems with extremely thin thickness.
Article
Nanoscience & Nanotechnology
Yongxin Jing, Hongchen Chu, Bo Huang, Jie Luo, Wei Wang, Yun Lai
Summary: The scattering matrix is a mathematical representation of scattering characteristics, but it lacks analytical forms for scatterers without high symmetry. We developed a deep neural network (DNN) that can calculate the scattering matrix of asymmetric scatterers thousands of times faster than finite element solvers. The DNN satisfies fundamental physical principles and enables inverse design using the gradient descent algorithm.
Article
Physics, Applied
Yi-jun Guan, Cheng-hao Wu, Qiao-rui Si, Yong Ge, Hong-xiang Sun, Yun Lai, Shou-qi Yuan
Summary: A low-frequency acoustic absorber has been experimentally demonstrated by using double split-ring resonators backed with a rigid wall. This absorber achieves near-perfect sound absorption at a subwavelength thickness and can increase the bandwidth by assembling supercells with distinct structure parameters.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Optics
Tianyu Hou, Xiangteng Li, Hao Luo, Yufeng Hao, Hongchen Chu, Yun Lai
Summary: This study proposes a wireless communication scheme using an optically-transparent metasurface to construct a functionalized metal window, which can significantly enhance the intensity of microwave signals and improve network and data transfer speeds.
Article
Optics
Jin Qin, Hainan He, Changqing Xu, Jie Luo, Yun Lai
Summary: Zero-index materials, specifically epsilon-near-zero (ENZ) gratings, have attracted significant scientific interest due to their unique polarization selectivity and blocking capability. Hybrid gratings combining perfect conductors and ENZ materials can effectively block omnidirectional electromagnetic waves of any polarization. Our research presents a promising approach for flexible polarization manipulation using ENZ gratings.
Article
Chemistry, Physical
Tianyu Hou, Di Li, Yan Qu, Yufeng Hao, Yun Lai
Summary: This study reports the large-scale synthesis of molybdenum disulfide (MoS2) thin films, accompanied by the formation of amorphous carbon layers. It confirms the combination of polycrystalline MoS2 with extraneous amorphous carbon layers and demonstrates the transformation of traditional n-type MoS2 into p-type semiconductors due to carbon incorporation. This unexpected behavior expands our understanding of TMDC properties and opens up new avenues for exploring novel device applications.
Article
Nanoscience & Nanotechnology
Zhonghan Fei, Jun Lan, Menyang Gong, Yun Lai, Xiaozhou Liu
Summary: In this paper, an unbalanced gain-loss acoustic metasurface is designed as an energy amplifier and can be used in acoustic signal detection. By combining two of these metasurfaces, an acoustic negative refraction system is established, allowing for negative refraction, focusing, and imaging. This work provides a new approach to using gain/loss materials and achieving multifunctionality without complex design.
