Article
Physics, Multidisciplinary
Shaomei Shi, Xiaojing Qiao, Qicai Jia
Summary: This research proposes a simple method to achieve ultra-broadband microwave absorption by loading only one split ring resonator and one lumped resistor in the absorber's unit cell. The absorber exhibits a low reflection coefficient in the frequency range of 14.20 GHz to 32.98 GHz, with a bandwidth of 18.78 GHz covering the Ku-, K-, and Ka-bands.
Article
Engineering, Electrical & Electronic
Saeed Zolfaghary Pour, Ebrahim Chegini, Mojtaba Mighani
Summary: A broadband metamaterial absorber, fabricated using 3D printing technology, is designed for operation in the X-band. It can absorb more than 90% of incoming waves in the frequency range of 7.1 to 13.8 GHz. The absorber is based on an infinite array of conductive ribbons, with a thickness of only 0.1 lambda at the minimum frequency. A circuit model and transmission line theory are used to explain the absorption principle. The design method is flexible and can be applied to other frequency bands. The absorber can be used in various applications such as communication, electromagnetic shielding, radar, and satellite, and is also suitable for flexible applications in the X-band.
IET MICROWAVES ANTENNAS & PROPAGATION
(2023)
Article
Nanoscience & Nanotechnology
WonHeum Han, Q-Han Park
Summary: We propose a broadband absorber that covers the entire microwave X-band using a dispersive metamaterial. The absorber requires anomalously dispersive permittivity in the targeted frequency band, which can be achieved with a double-layered, square-loop metamaterial and a two-pole Lorentz oscillator model. An equivalent circuit model is used to explain the connection between the oscillator model and the metamaterial, and explicit design rules are presented. A 4-mm-thick metamaterial absorber is fabricated using flexible silicon rubber, a resistor element, and conductive ink, achieving reflectance of less than -20 dB over the entire X-band region.
Article
Physics, Applied
Shuying Li, Liangliang Liu, Yuying Jiang, Chunzi Tang, Changqing Gu, Zhuo Li
Summary: In this paper, an ultrathin optically transparent metamaterial absorber (OTMMA) is proposed for broadband microwave invisibility of solar panels. The OTMMA shows high absorptivity and efficient light transmittance, making it suitable for solar panels.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
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
Multidisciplinary Sciences
Saif Hannan, Mohammad Tariqul Islam, Mohammad Rashed Iqbal Faruque, Muhammad E. H. Chowdhury, Farayi Musharavati
Summary: This study presents an advanced approach to design a dual-band WiFi signal absorber with desired outputs and resonance frequencies. By using equivalent circuit analysis and precise numerical simulation, a metamaterial absorber that meets specific requirements was successfully designed. The proposed absorber can be utilized in practical applications related to SAR reduction, crowdsensing, and other WiFi-related scenarios.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Raj Kumar, Bipin K. Singh, Praveen C. Pandey
Summary: We have proposed a low-cost metamaterial absorber consisting of cone-shaped resonators made of nickel and a silicon dioxide dielectric layer. The absorber exhibits high average absorption rates of 97% for both transverse magnetic and transverse electric modes in the visible region. It also shows polarization angle independence and high absorption rates with different incidence angles. The proposed absorber has the potential to improve the efficiency and cost-effectiveness of photovoltaic systems.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Yiran Yang, Arul Kulandaivel, Sadok Mehrez, Ibrahim Mahariq, Ibrahim Elbadawy, Vinayagam Mohanavel, Abduladheem Turki Jalil, Marwan Mahmood Saleh
Summary: A CNTs-modified BaTiO3/CoS2 ternary nanostructure was synthesized by the hydrothermal method for the development of a novel electromagnetic microwave absorber. The BaTiO3/CoS2 nanocomposite was connected by CNTs to form conductive networks for electron migration and hopping. The prepared nanocomposite showed superior microwave absorbing properties with a minimum reflection loss of -72.2 dB and an effective absorption bandwidth of 6.9 GHz.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Xiaofeng Liu, Jiajia Sun, Shixin Xiu, Zongqian Shi
Summary: In this paper, a mid-infrared perfect metamaterial absorber (PMA) composed of well-engineered unit cells is proposed. The electromagnetic response of the designed PMA is analyzed using a 3D full-wave computational model. A three-circulation equivalent circuit model is proposed to predict the resonant wavelength of the PMA, considering the influence of coupling capacitance. The designed PMA exhibits angle and polarization-independent characteristics with a smaller relative size and thinner relative thickness.
Article
Computer Science, Information Systems
Somayyeh Asgari, Tapio Fabritius
Summary: This article designs and simulates a multi-band terahertz absorber based on a non-symmetric double-sided graphene comb resonator array. It proposes an equivalent circuit model based on admittance and fast MATLAB code for analyzing the absorber in the THz region. The absorber has a strong linear dichroism response, with two absorption bands for TE mode and three for TM mode in the frequency range of 0.7-5 THz, and can be used in polarization-sensitive devices and systems in the THz region.
Article
Optics
Xiaokun Yang, Xueheng Zhang, Zhao Ding, Zhengping Zhang
Summary: This paper proposes a sextuple-band EM absorber with absorptivity over 90% within 5 bands from S to K. The absorber is made of inexpensive FR4 material with an ultrathin substrate of only 1 mm. By combining 3 different geometries and introducing an "A"-shaped improver, the absorptivity of all bands is raised to 90% or above. An equivalent circuit model is established to further demonstrate the multiple band characteristics. A prototype is fabricated and measured, showing consistent results with simulation. This work can be considered an excellent candidate for radar cross-section reduction, frequency selection surface, cloaking material, etc.
Article
Materials Science, Multidisciplinary
Nikunj Goyal, Ravi Panwar
Summary: A Minkowski-inspired circular fractal microwave absorber has been developed for multiband absorption from 1 to 18 GHz. The absorber consists of second-order circular fractal rings on a dielectric substrate with a metallic backing layer. The miniaturization capability of the unique Minkowski geometry enables the design of a smaller-sized multiband absorber. The absorber exhibits nearly perfect absorption of multiple peaks regardless of the polarization angle, making it suitable for scientific and military applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Zirui Jia, Xiaoyi Zhang, Zheng Gu, Guanglei Wu
Summary: Ni-Co/PC composite is prepared by introducing metal Co element with Ni-MOF/PC as precursor. Then a series of Ni-Co bimetal/PC composites are prepared by polyaniline coating, oxidation reaction, and vulcanization reaction. It is found that vulcanization reaction was the best path for the electromagnetic wave absorption performance of the product. The minimum reflection loss (RLmin) of NiCo2S4/PC composite reaches - 67.81 dB at the sample thickness of 2.6 mm, and the maximum effective absorption bandwidth (EAB) reaches 6.16 GHz when the sample thickness is 2.1 mm. NiCo2S4/PC composite is an ideal electromagnetic wave absorber due to its excellent electrical conductivity, rich surface, and high attenuation capability.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Amr M. Mahros, Yara Alharbi
Summary: In this paper, the characteristics of a plasmonic metamaterial absorber based on a metal-insulator-metal functional stack are presented and explored. The impact of modifying nano-hole and embedded disc diameters on the absorber's performance is investigated. The proposed absorber structure shows high absorption rate and short circuit current density, and can be tailored to absorption spectra.
Article
Chemistry, Physical
Tuanjie Liu, Jonathan M. Caballero, Yang Wang
Summary: We have designed a new type of optical absorber by combining impedance matching theory and equivalent circuit model, which improves design efficiency and reduces calculations compared to traditional design methods. The absorber has high absorption rate (>90%) over a wide absorption bandwidth of 2550 nm, covering both visible and near-infrared wavelengths (300 - 2850 nm). It also exhibits polarization-insensitive and wide-angle absorption characteristics, with an average absorption rate exceeding 88% at an incidence angle up to 60 degrees for both transverse electric and transverse magnetic modes. The perfect absorption is attributed to local surface plasmon resonance, cavity resonance, and their synergistic interaction. This design has great potential for solar thermal energy harvesting, fire detection, and thermoelectric applications.
Article
Optics
Honggeng Wanga, Ya Bai, Erheng Wu, Zhanshan Wang, Peng Liu, Chengpu Liu
OPTICS COMMUNICATIONS
(2018)
Article
Optics
Zhengfeng Hu, Chengpu Liu, Jin-Ming Liu, Yuzhu Wang
Article
Optics
Chaojin Zhang, Wen Lu, Erheng Wu, Chengpu Liu
EUROPEAN PHYSICAL JOURNAL D
(2018)
Article
Optics
Zhengfeng Hu, Jin-Ming Liu, Chengpu Liu, Yuzhu Wang
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2018)
Article
Optics
H. Lin, C. P. Liu
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2019)
Article
Optics
Qing Zhang, Zhou Zhen, Chengpu Liu, Deep Jariwala, Xudong Cui
Article
Optics
Honggeng Wang, Qiying Song, Shuiqin Zheng, Qinggang Lin, Erheng Wu, Yuexia Ai, Chengpu Liu, Shixiang Xu
Article
Physics, Multidisciplinary
Erheng Wu, Chaojin Zhang, Zhanshan Wang, Chengpu Liu
NEW JOURNAL OF PHYSICS
(2020)
Article
Optics
H. Lin, C. P. Liu
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2020)
Article
Optics
Hao Guo, Tie-Jun Wang, Xuan Zhang, Chengpu Liu, Na Chen, Yaoxiang Liu, Haiyi Sun, Baifei Shen, Yunxia Jin, Yuxin Leng, Ruxin Li
Article
Optics
Xiaoxue Zhang, Erheng Wu, Henglei DU, Huicheng Guo, Chengpu Liu
Summary: The light-induced residual current in monolayer graphene driven by a circularly polarized few-cycle laser is investigated using numerical methods. It is found that an evident current direction reversal occurs when the amplitude of the driving electric field exceeds a certain threshold, which was not observed in previous studies. The internal physical mechanism for the current reversal is inter-optical-cycle interference under a suitable long laser wavelength, and the reversal-related laser field amplitude is sensitive to the ratio of ponderomotive energy to photon energy.
Article
Optics
Chaojin Zhang, Yi Zhang, Henglei DU, Chengpu Liu
Summary: The harmonic radiation generated by a vortex laser field and an epsilon-near-zero (ENZ) material was numerically studied using Maxwell-paradigmatic-Kerr equations. High order harmonics up to the seventh-order were produced at a low laser intensity (-109 W/cm2) for a long-duration laser field. The intensities of high order vortex harmonics at the ENZ frequency were higher than at other frequencies due to the ENZ field enhancement effects. However, for a short-duration laser field, there was an obvious frequency redshift in the high order vortex harmonic radiation due to the strong change in laser waveform propagating in the ENZ material and the non-constant field enhancement factor around the ENZ frequency.
Article
Chemistry, Multidisciplinary
Hai Lin, Chengpu Liu
APPLIED SCIENCES-BASEL
(2019)
Article
Optics
Honggeng Wang, Ya Bai, Erheng Wu, Zhanshan Wang, Peng Liu, Chengpu Liu
Article
Optics
Chaojin Zhang, Erheng Wu, Mingliang Gu, Zhengfeng Hu, Chengpu Liu
