Article
Materials Science, Multidisciplinary
Jing Liu, Wei Chen, Wen-Zhuang Ma, Yu-Shan Chen, Xu-Chu Deng, Ping-Ping Zhuang, Qiubo Ye
Summary: The study introduces a biaxial hyperbolic metamaterials (HMMs) sawtooth absorber utilizing anisotropic black phosphorus (BP) to achieve high absorption rates, omnidirectionality, and polarization sensitivity. Unlike traditional multilayer metal/dielectric absorbers, the proposed absorber relies on localized surface plasmon resonance for absorption.
RESULTS IN PHYSICS
(2021)
Article
Optics
Xinye Tian, Xuejun Qiu, Zhenzhou Cao, Jin Hou, Chunyong Yang
Summary: In this paper, a broadband metamaterial absorber (BMA) based on a thin metamaterial nanostructure composed of 2D Au square grating on graphene-SiO2 film and Au substrate is proposed and designed. The optimized structure achieves nearly perfect absorption in a broad range from deep UV light to visible light (100 nm-700 nm), exceeding 90% absorption. The mechanism responsible for the broadband absorption, including the excitation of Rayleigh anomaly (RA), cavity resonance (CR), surface plasmon polaritons (SPPs) and magnetic polaritons (MPs), has been analyzed using finite-difference time-domain (FDTD) method and the LC circuit model. The proposed BMA is also polarization and angle insensitive for incident light, even at large angles. It shows great potential in solar cell and photo-detector applications due to its simple geometry, ordinary metal-based material composition, and high performance in both bandwidth and absorptivity.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Jieping Yang, Hu Deng, Zhonggang Xiong, Liping Shang
Summary: The study introduces a terahertz sensor based on metamaterial and microfluidic channels, with high sensitivity and quality factor. The findings help advance the application of terahertz technology in biomedical sensing and substance detection.
Article
Optics
Baoqing Wang, Cuiping Ma, Peng Yu, Alexander O. Govorov, Hongxing Xu, Wenhao Wang, Lucas V. Besteiro, Zhimin Jing, Peihang LI, Zhiming Wang
Summary: In this work, an ultra-broadband nanowire metamaterial absorber composed of vertically aligned dielectric nanowires with coaxial metallic rings is proposed. The absorber exhibits strong absorption from 0.2 to 7 μm wavelength range, making it suitable for various applications.
PHOTONICS RESEARCH
(2022)
Article
Optics
Dac Tuyen Le, Ba Tuan Tong, Thi Kim Thu Nguyen, Thanh Nghia Cao, Hong Quang Nguyen, Manh Cuong Tran, Chi Lam Truong, Xuan Khuyen Bui, Dinh Lam Vu, Thi Quynh Hoa Nguyen
Summary: A three-layer structure metamaterial absorber was designed for polarization-insensitive dual-band absorption in the THz region, achieving absorptivity greater than 96% at specific frequencies. The asymmetrical design structure eliminates polarization dependence and allows for tuning of absorption bands by varying the resonator dimensions.
Article
Physics, Applied
Fanyi Liu, Limei Qi
Summary: The proposed broadband absorber, consisting of silicon rods and nickel ground, achieves high absorption efficiency in the visible band with strong polarization and angle independence. The physical mechanism is analyzed through impedance matching theory and field distributions of eigenmodes. With a simple structure and cost-effective materials, this absorber shows great potential for application in solar cells.
MODERN PHYSICS LETTERS B
(2021)
Article
Nanoscience & Nanotechnology
Xiangbo Ji, Wenzhi Qin, Xuannan Wu, Yao Wang, Fuhua Gao, Liang Wang, Yidong Hou
Summary: This study demonstrates a high-performance Laser Driven Flyer (LDF) by using a perfect metamaterial absorber (PMA) to improve the energy utilization efficiency of light. The designed Ag nanopillar array in anodic aluminum oxide templates greatly reduces the reflectivity of the flyer, resulting in an increased final speed of the flyer generated in the PMA-enhanced LDF approach.
Article
Engineering, Mechanical
Roberto Brighenti, Farzad Tatar
Summary: Metamaterials are a new class of materials that derive their physical properties from their structure and arrangement rather than their composition and chemical structure. This paper analyzes the thermal and mechanical response of 2D porous metamaterials and presents an analytical model based on geometric tortuosity for predicting thermal response.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Composites
Ruyi Gan, Miao Yu, Shixu Li, Yaping Li, Biao Fang, Song Qi
Summary: This study introduces an electromagnetic absorbing metamaterial based on magnetorheological plastomer, which exhibits excellent absorption performance and reconfigurability. Through digital coding design, the absorption characteristics of the metamaterial can be adjusted and controlled effectively.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
Jun Wu, Yasong Sun, Biyuan Wu, Chunlei Sun, Xiaohu Wu
Summary: This article designs and studies a polarization insensitive, broadband and wide-angle perfect metamaterial absorber for solar energy harvesting, which has high absorption rate and large fabrication tolerance. The absorption spectra are consistent with solar spectrum and robust against incident angle changes.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Jitendra K. Behera, Kuan Liu, Meng Lian, Tun Cao
Summary: The article presents a reconfigurable HMM perfect absorber based on alternating gold and GST225 layers for the near-infrared region, showing a red-shift of the absorptance peak and omnidirectional, polarization-independent characteristics. The absorptance peak can be reversibly switched in just five nanoseconds by changing the state of GST225.
NANOSCALE ADVANCES
(2021)
Article
Physics, Applied
Santosh Dasila, Chitti Venkata Krishnamurthy, V. Subramanian
Summary: A miniaturized, broadband absorber with high absorption rate (> 95%) has been proposed and constructed, using quarter-wavelength resonator tubes as rectangular meta-atoms. The study presents the basic theoretical aspects, numerical simulations, fabrication process, and experimental validation of the absorber. The use of simple, fabrication-friendly meta-atoms allows for greater spatial coverage by tiling over large surfaces.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Khalid Majeed, Shahab Ahmad Niazi, O. Altintas, M. A. Baqir, M. Karaslaan, Ugur Cem Hasar
Summary: In this study, a single-layered cartwheel-shaped metamaterial absorber operating in the microwave band is proposed. The absorber shows good angular stability and high absorptivity at multiple resonance peaks. Its absorption characteristics can be tuned by modifying the substrate thickness.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Multidisciplinary
KangKang Chen, GuoWei Tu, XingJian Dong, YiFan Huangfu, ZhiKe Peng
Summary: In this study, a novel plate-type metamaterial with a two-dimensional bandgap was designed to achieve low-frequency and broadband bandgaps. The bandgaps can be adjusted by mass re-distribution, stiffness design, and excitation amplitude. The research results can provide new ideas for structural design and engineering applications of mechanical metamaterials.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Physics, Multidisciplinary
Cristian Mejia-Cortes, Mario Molina
Summary: The study investigates the impact of resonant frequency disorder on the eigenstates and transport of magnetic energy in a two-dimensional array of split-ring resonators. Different behaviors of mean square displacement (MSD) are observed in the presence and absence of disorder, with evidence of sub-diffusive behavior in a correlated disorder window.
Article
Forestry
Gang Wei, Ke Rong, Kexin Yang, Zhiying Bao, Xiaotong Zhang, Zhi Zhang, Yanni Gong, Jiafu Wang
Summary: After maturation, Korean pine seeds rely on animal dispersal for regeneration due to difficulty in reaching suitable germination sites. Squirrels prefer pine seeds as winter food because of their high energy content and ease of storage. Korean pine seeds not only provide nutrition for squirrels, but also promote their physical health and immunity.
JOURNAL OF FORESTRY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Songyan Li, Xiaoxia Tian, Jiafu Wang, Song Xia, Lisi Ma, Junxiang Zhou, Chenchen Li, Zhe Qin, Shaobo Qu
Summary: By dotting 3D graphene particles, the microwave absorption performances of Fe3O4@N-C composite derived from Fe-MOF have been successfully improved. The electromagnetic parameters of the composites can be effectively adjusted by controlling the addition of 3D graphene. The optimal composite displays outstanding absorption performances, achieving wide effective absorption bandwidth at different matching thicknesses.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Optics
Ruichao Zhu, Jiafu Wang, Jinming Jiang, Cuilian Xu, Che Liu, Yuxiang Jia, Sai Sui, Zhongtao Zhang, Tonghao Liu, Zuntian Chu, Jun Wang, Tie Jun Cui, Shaobo Qu
Summary: This paper introduces the use of machine learning to solve the multispectral compatibility problem in metamaterial design and designs a multi-mechanism metafilm that achieves small microwave scattering, low infrared emissivity, and visible transparency simultaneously. Rapid evolution of structural design is realized by establishing a mapping between spectral curves and structural parameters.
PHOTONICS RESEARCH
(2022)
Article
Physics, Applied
Chao Liu, Zhe Qin, Yongfeng Li, Tonghao Liu, Jiafu Wang, Shaobo Qu
Summary: In this paper, a low RCS TCDA based on a novel FSPC is proposed. The FSPC structure consists of a polarization conversion metasurface and a band-pass frequency selective surface. The coding sequence of FSPC is obtained using simulated annealing algorithm for RCS reduction. The co-design of TCDA with FSPC is presented and the radiation performance meets the design requirements. Measurement results show significant reflection reduction from 15 GHz to 21 GHz compared with a metallic plane of the same size, and the simulated and measured radiation patterns agree well.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Shuo Wang, Jian Wang, Yafei Song, Sicong Li, Wei Huang
Summary: This paper proposes a vision-based method for detecting malware variants, which addresses cybersecurity threats in an intelligent and efficient manner. By optimizing malware image processing and feature extraction methods, as well as utilizing a hyperparameter optimization algorithm, the detection model achieves higher accuracy and efficiency.
APPLIED SCIENCES-BASEL
(2022)
Article
Computer Science, Artificial Intelligence
Jie Lai, Xiaodan Wang, Qian Xiang, Jian Wang, Lei Lei
Summary: This study proposes a novel deep learning algorithm for classification tasks with label information. By introducing the Fisher criterion, the algorithm is able to learn more discriminative abstract features, resulting in better performance and robustness in classification.
COMPLEX & INTELLIGENT SYSTEMS
(2023)
Article
Physics, Multidisciplinary
Zhe Qin, Yongfeng Li, He Wang, Chenchen Li, Chao Liu, Zhibiao Zhu, Qi Yuan, Jiafu Wang, Shaobo Qu
Summary: The functional versatility and flexibility of multifunctional metasurfaces are significant for various applications. This study proposes an active programmable coding metasurface that integrates transmission and reflection control of polarized electromagnetic waves in real time.
ANNALEN DER PHYSIK
(2023)
Article
Engineering, Electrical & Electronic
Dou Tian, Amin Kianinejad, Ting Shi, Chen Guo, Jiafu Wang, Anxue Zhang
Summary: A compact dual-band high-efficiency antenna based on spoof surface plasmon polaritons (SSPPs) is proposed in this article, which effectively excites both the TM10 mode and the LC resonant mode. The antenna achieves compact size and high radiation efficiency due to the high field confinement and effective refractive index of SSPPs. A reliable circuit model is proposed for the antenna and a prototype is fabricated and measured. The proposed dual-band antenna shows high total efficiencies and has potential applications in wireless communication systems.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Physics, Applied
Tianshuo Qiu, Weihan Li, Jiafu Wang, Jianqi Wang, Qiang An, Bingyang Liu, Yangfan Hou, Juanna Jiang, Wenxuan Tang, Ziru Cheng, Shaobo Qu
Summary: A method of achieving asymmetric transmission is proposed by exploiting the direction-dependent absorption of spoof surface plasmon polaritons (SSPPs). By combining trapezoidal wire arrays as absorbers with cutting metal wires as polarization rotators, the metamaterial exhibits different properties depending on the incident wave direction, enabling asymmetric transmission. The conversion of incident waves to SSPPs is efficiently achieved by trapezoidal wire arrays, while the propagation and absorption of SSPPs can be controlled by engineering the spatial dispersion of k-vector. The polarization rotation performance can be customized by changing the length of cutting metal wires. The study demonstrates the effectiveness of the proposed method, providing design flexibility and efficiency for asymmetric transmission.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Applied
Bingyue Qu, Yongqiang Pang, Jiafu Wang, Xinmin Fu, Hongyu Shi, Luyi Wang, Anxue Zhang, Zhuo Xu
Summary: This paper proposes a wideband low-profile top-loaded patch monopole antenna based on surface current engineering. By loading inductive vias on the outermost rings and connecting them to the ground, the low-frequency resonance can be enhanced, achieving antenna miniaturization and bandwidth enhancement. The method provides a path for antenna design in low-profile ultra-wideband applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Ceramics
Ying Zhu, Lei Zhang, Jun Wang, Fang Zhou, Boheng Gui, Mingde Feng, Jiafu Wang, Shaobo Qu
Summary: In order to achieve microwave-infrared compatible stealth in high temperature conditions, thin films of high-entropy alloys (HEAs) were deposited on an Al2O3 matrix using magnetron sputtering technology. The thermal stability of the films was investigated through annealing at temperatures of 500°C, 600°C, and 700°C. The results showed that the HEA film was severely oxidized at 700°C for 6 hours, leading to a significant decrease in infrared reflectivity. However, the HEA films exhibited low infrared emissivity of 0.09 at 600°C and excellent thermal stability at 500°C for 20 hours with low infrared emissivity of 0.11. A simple metamaterial design utilizing HEA films was proposed for infrared-microwave compatible stealth. The study demonstrates the great potential of introducing HEAs in the field of high temperature compatible stealth due to their excellent thermal stability and durable high temperature stealth performance.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Chang Ding, Yudeng Wang, Junxiang Zhou, Huilin Mu, Yajuan Han, Fanyi Meng, Jiafu Wang
Summary: Liquid crystals with tunable dielectric properties in the microwave frequency band are of great significance for design of reconfigurable microwave devices. This article proposes a method for characterizing the dielectric properties of liquid crystals based on epsilon-near-zero metamaterials. The method involves designing a measurement device, integrating biased circuits and preconditioned alignments, and controlling the temperature of the liquid crystals. The effectiveness of the method is verified through experiments.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Zuntian Chu, Tiefu Li, Jiafu Wang, Yajuan Han, Ruichao Zhu, Tiejun Cui, Shaobo Qu
Summary: By utilizing the synergy of multimechanism resonances, this article proposes a method to achieve electromagnetic windows (EMWs) that enable broadband transmissions of both TM-and TE-polarized waves in an ultrawide range of incident angles. The proposed EMW utilizes Fano resonance and Drude resonances to expand the bandwidth for TE-polarization and suppress adverse influences of the parasitic Lorentz resonance for TM-polarization, respectively. Experimental validation confirms the ultrawide-angle broadband functionalities of this EMW, which can have wide applications in radar, communication, and imaging systems.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Physics, Applied
Yajuan Han, Jiafu Wang, Xinmin Fu, Hongya Chen, Chang Ding, Shaobo Qu
Summary: In this paper, the electromagnetic properties of tightly coupled spoof surface plasmon polariton (SSPP) modes and a slender broadside antenna based on the tightly coupled SSPP are investigated and proposed. The compactness and miniaturization of microwave devices are favored by the tight confinement of TC-SSPP modes around the slender structure. A prototype of the proposed antenna was designed, fabricated, and measured, with both simulated and measured results verifying the design.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Zuntian Chu, Xinqi Cai, Tiefu Li, Ruichao Zhu, Huiting Sun, Yuxiang Jia, Yajuan Han, Jiafu Wang
Summary: Artificially elaborated metasurfaces have revolutionized the manipulation of electromagnetic waves in microwave, terahertz, and optics fields. This study proposes a highly efficient ultra-wideband transmissive metasurface using twisted nematic liquid crystals, which allows for simultaneous control of amplitude, phase, and polarization with high bandwidth and maintained polarization. Two proof-of-prototypes demonstrate the feasibility and significance of this approach.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
