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Hsun CH, Chen FC. Bidirectional planar absorber with polarization-selective absorption and transmission capabilities. OPTICS EXPRESS 2023; 31:22928-22953. [PMID: 37475391 DOI: 10.1364/oe.493708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/02/2023] [Indexed: 07/22/2023]
Abstract
In this study, we developed a novel planar bidirectional perfect metamaterial absorber (PMA) with polarization-selective absorption and transmission capabilities. The proposed structure can bidirectionally absorb x-polarized incident waves almost perfectly while functioning as a transparent surface for y-polarized incident waves at the same frequency. We discussed the performance and properties of the proposed PMA through simulation results and a theoretical model. We also used the free-space method in experimental tests of a fabricated sample. The results indicated fair consistency between the simulated and measured results, thereby validating the quality of our PMA design.
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Pisano G, Dunscombe C, Hargrave P, Shitvov A, Tucker C. Thin flexible multi-octave metamaterial absorber for millimeter wavelengths. APPLIED OPTICS 2023; 62:2317-2328. [PMID: 37132871 DOI: 10.1364/ao.478842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The development of radiation-absorbent materials and devices for millimeter and submillimeter astronomy instruments is a research area of significant interest that has substantial engineering challenges. Alongside a low-profile structure and ultra-wideband performance in a wide range of angles of incidence, advanced absorbers in cosmic microwave background (CMB) instruments are aimed at reducing optical systematics, notably instrument polarization, far beyond previously achievable specifications. This paper presents a metamaterial-inspired flat conformable absorber design operating in a wide frequency range of 80-400 GHz. The structure comprises a combination of subwavelength metal-mesh capacitive and inductive grids and dielectric layers, using the magnetic mirror concept for a large bandwidth. The overall stack thickness is a quarter of the longest operating wavelength and is close to the theoretical limit stipulated by Rozanov's criterion. The test device is designed to operate at a 22.5° incidence. The iterative numerical-experimental design procedure of the new metamaterial absorber is discussed in detail, as well as the practical challenges of its manufacture. A well-established mesh-filter fabrication process has been successfully employed for prototype fabrication, which ensures cryogenic operation of the hot-pressed quasi-optical devices. The final prototype, extensively tested in quasi-optical testbeds using a Fourier transform spectrometer and a vector network analyzer, demonstrated performance closely matching the finite-element analysis simulations; that is, greater than 99% absorbance for both polarizations, with only a 0.2% difference, across the frequency band of 80-400 GHz. The angular stability for up to ±10∘ has been confirmed by simulations. To the best of our knowledge, this is the first successful implementation of a low-profile, ultra-wideband metamaterial absorber for this frequency range and operating conditions.
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Zhao R, Feng Y, Ling H, Zou X, Wang M, Lu G. Enhanced Terahertz Fingerprint Sensing Mechanism Study of Tiny Molecules Based on Tunable Spoof Surface Plasmon Polaritons on Composite Periodic Groove Structures. SENSORS (BASEL, SWITZERLAND) 2023; 23:2496. [PMID: 36904706 PMCID: PMC10007521 DOI: 10.3390/s23052496] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/14/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
Highly sensitive detection of enhanced terahertz (THz) fingerprint absorption spectrum of trace-amount tiny molecules is essential for biosensing. THz surface plasmon resonance (SPR) sensors based on Otto prism-coupled attenuated total reflection (OPC-ATR) configuration have been recognized as a promising technology in biomedical detection applications. However, THz-SPR sensors based on the traditional OPC-ATR configuration have long been associated with low sensitivity, poor tunability, low refractive index resolution, large sample consumption, and lack of fingerprint analysis. Here, we propose an enhanced tunable high-sensitivity and trace-amount THz-SPR biosensor based on a composite periodic groove structure (CPGS). The elaborate geometric design of the spoof surface plasmon polaritons (SSPPs) metasurface increases the number of electromagnetic hot spots on the surface of the CPGS, improves the near-field enhancement effect of SSPPs, and enhances the interaction between THz wave and the sample. The results show that the sensitivity (S), figure of merit (FOM) and Q-factor (Q) can be increased to 6.55 THz/RIU, 4234.06 1/RIU and 629.28, respectively, when the refractive index range of the sample to measure is between 1 and 1.05 with the resolution 1.54×10-5 RIU. Moreover, by making use of the high structural tunability of CPGS, the best sensitivity (SPR frequency shift) can be obtained when the resonant frequency of the metamaterial approaches the biological molecule oscillation. These advantages make CPGS a strong candidate for the high-sensitivity detection of trace-amount biochemical samples.
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Affiliation(s)
- Ruiqi Zhao
- Shandong Key Laboratory of Low-Altitude Airspace Surveillance Network Technology, QILU Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Jinan 250132, China
| | - Yu Feng
- Shandong Key Laboratory of Low-Altitude Airspace Surveillance Network Technology, QILU Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Jinan 250132, China
| | - Haotian Ling
- Shandong Key Laboratory of Low-Altitude Airspace Surveillance Network Technology, QILU Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Jinan 250132, China
| | - Xudong Zou
- Shandong Key Laboratory of Low-Altitude Airspace Surveillance Network Technology, QILU Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Jinan 250132, China
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Meng Wang
- School of Integrated Circuit Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Guizhen Lu
- State Key Laboratory of Media Convergence and Communication, Communication University of China (CUC), Beijing 100039, China
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Zhou F, Fu Y, Tan R, Zhou J, Chen P. Broadband and wide-angle metamaterial absorber based on the hybrid of spoof surface plasmonic polariton structure and resistive metasurface. OPTICS EXPRESS 2021; 29:34735-34747. [PMID: 34809256 DOI: 10.1364/oe.439541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Electromagnetic (EM) wave absorber with broad and robust absorption performance over wide incident angle range is persistently desired in specific applications. In this work, we propose and demonstrate a broadband and wide-angle metamaterial absorber (MA) based on a hybrid of stereo spoof surface plasmonic polariton (SSPP) structure and planar resistive metasurface. At first, we design a broadband SSPP absorber by adjusting the dispersion and loss of the artificial plasmonic structure (PS) simultaneously. Furthermore, owing to utilize its spatial phase manipulation ability, we integrate a resistive metasurface on top of the PS to construct a modified circuit analog (CA) absorber with a dispersive metamaterial spacer. The absorption mechanism of the hybrid structure is analyzed theoretically. The results indicate that the hybrid MA is equipped with broad and robust absorption performance over a wide incident angle range due to the synergistic absorption of the PS and metasurface. Finally, a prototype of the hybrid MA is fabricated by silk-printing technic and its absorption performances are measured. The experimental results can verify the theoretic ones and indicate that proposed hybrid MA can achieve 90% absorptivity from 3.9 GHz to 10.6 GHz with thickness of 7.0 mm, which is only 106% times of the ultimate thickness corresponding to the absorption performance of MA. In general, the concept and design offer a distinct approach of utilizing SSPP to design absorbers with excellent performances from radio frequency to optic band, which are promising for extensive applications.
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Gao Z, Fan Q, Xu C, Tian X, Tian C, Wang J, Qu S. Compatible stealth design of infrared and radar based on plasmonic absorption structure. OPTICS EXPRESS 2021; 29:28767-28777. [PMID: 34614999 DOI: 10.1364/oe.432703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
In this paper, a metamaterial structure with radar and infrared (IR) compatible stealth characteristics is designed based on the principle of plasmonic absorbing structure (PAS). Due to the lack of reports on PAS-based IR radar compatible stealth, this article combines PAS and IR frequency selective surfaces to achieve the desired purpose. Through mathematical modeling and dispersion engineering of the unit cell proposed, a PAS with ultra-wideband wave absorption is realized. The low emissivity of the IR atmospheric window band is realized by means of the simulation and analysis of the IR frequency selective surface with different indium tin oxide (ITO) occupation ratios. The absorptivity of designed structure is higher than 90% from 4GHz to 28.6GHz, and the emissivity of the IR atmospheric window is only 0.3. The experience of the fabricated sample is consistent with the theoretical analysis and the simulation. Our method enriches the implementation strategies of radar-IR compatibility and has reference significance for multi-spectrum compatible stealth.
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Fan RH, Xiong B, Peng RW, Wang M. Constructing Metastructures with Broadband Electromagnetic Functionality. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1904646. [PMID: 31692147 DOI: 10.1002/adma.201904646] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/14/2019] [Indexed: 06/10/2023]
Abstract
Electromagnetic metastructures stand for the artificial structures with a characteristic size smaller than the wavelength, which may efficiently manipulate the states of light. However, their applications are often restricted by the bandwidth of the electromagnetic response of the metastructures. It is therefore essential to reassert the principles in constructing broadband electromagnetic metastructures. Herein, after summarizing the conventional approaches for achieving broadband electromagnetic functionality, some recent developments in realizing broadband electromagnetic response by dispersion compensation, nonresonant effects, and several trade-off approaches are reviewed, followed by some perspectives for the future development of broadband metamaterials. It is anticipated that broadband metastructures will have even more substantial applications in optoelectronics, energy harvesting, and information technology.
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Affiliation(s)
- Ren-Hao Fan
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Bo Xiong
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Ru-Wen Peng
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Mu Wang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
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Yan L, Jiang W, Zhang C, Zhang Y, He Z, Zhu K, Chen N, Zhang W, Han B, Zheng X. Enhancement by Metallic Tube Filling of the Mechanical Properties of Electromagnetic Wave Absorbent Polymethacrylimide Foam. Polymers (Basel) 2019; 11:E372. [PMID: 30960356 PMCID: PMC6419214 DOI: 10.3390/polym11020372] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/15/2019] [Accepted: 02/15/2019] [Indexed: 11/20/2022] Open
Abstract
By the addition of a carbon-based electromagnetic absorbing agent during the foaming process, a novel electromagnetic absorbent polymethacrylimide (PMI) foam was obtained. The proposed foam exhibits excellent electromagnetic wave-absorbing properties, with absorptivity exceeding 85% at a large frequency range of 4.9⁻18 GHz. However, its poor mechanical properties would limit its application in load-carrying structures. In the present study, a novel enhancement approach is proposed by inserting metallic tubes into pre-perforated holes of PMI foam blocks. The mechanical properties of the tube-enhanced PMI foams were studied experimentally under compressive loading conditions. The elastic modulus, compressive strength, energy absorption per unit volume, and energy absorption per unit mass were increased by 127.9%, 133.8%, 54.2%, and 46.4%, respectively, by the metallic tube filling, and the density increased only by 5.3%. The failure mechanism of the foams was also explored. We found that the weaker interfaces between the foam and the electromagnetic absorbing agent induced crack initiation and subsequent collapses, which destroyed the structural integrity. The excellent mechanical and electromagnetic absorbing properties make the novel structure much more competitive in electromagnetic wave stealth applications, while acting simultaneously as load-carrying structures.
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Affiliation(s)
- Leilei Yan
- School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Wei Jiang
- Department of Basic Sciences, Air Force Engineering University, Xi'an 710051, China.
| | - Chun Zhang
- School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Yunwei Zhang
- Department of Basic Sciences, Air Force Engineering University, Xi'an 710051, China.
| | - Zhiheng He
- School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Keyu Zhu
- School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Niu Chen
- School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Wanbo Zhang
- Department of Basic Sciences, Air Force Engineering University, Xi'an 710051, China.
| | - Bin Han
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
- Research Institute of Xi'an Jiaotong University, Hangzhou 311215, Zhejiang, China.
| | - Xitao Zheng
- School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China.
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Liu Y, Guo S, He S. Illusion Optics: Disguising with Ordinary Dielectric Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1805106. [PMID: 30548888 DOI: 10.1002/adma.201805106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 11/15/2018] [Indexed: 06/09/2023]
Abstract
Illusion devices are usually designed using transformation optics. Here, a new method is proposed to achieve optical illusions without external devices by elaborately manipulating the scattering potential of an object. In contrast to the conventional transformation optics method, which completely replaces one object by the image of another object using complementary\restoring media and a superlens, the method described here is more of a cosmetic operation for an object, which modifies the scattering pattern of the object to mimic another object by exchanging their scattering potentials in two symmetrical areas in the wave vector domain. Only positive isotropic nonmagnetic materials are introduced in the present method, which is impossible using the conventional method because superlenses require negative-index materials. Both numerical simulations and experimental demonstrations are used to verify the performance of the illusion devices of this method.
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Affiliation(s)
- Yichao Liu
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, 310058, China
| | - Shuwei Guo
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, 310058, China
| | - Sailing He
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, 310058, China
- Department of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology (KTH), Osquldas väg 6, plan 5, SE-114 28, Stockholm, Sweden
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9
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Shen Y, Zhang J, Shen L, Sui S, Pang Y, Wang J, Ma H, Qo S. Transparent and broadband absorption-diffusion-integrated low-scattering metamaterial by standing-up lattice. OPTICS EXPRESS 2018; 26:28363-28375. [PMID: 30470009 DOI: 10.1364/oe.26.028363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 09/27/2018] [Indexed: 06/09/2023]
Abstract
In this paper, a transparent absorption-diffusion-integrated metamaterial (ADMM) based on standing-up lattice structure is proposed which takes full advantage of electromagnetic absorption and destructive interference simultaneously for the suppression of broadband backward scattering within a wide angular domain, especially for the lower-frequency scattering. The proposed ADMM is constituted by two kinds of rhombic and squared ITO lattices arranged in a pseudorandom distribution and then backed with ITO film. Calculation, simulation, and experimental measurement show that the proposed ADMM can achieve low scattering with normalized reflection less than 0.1 in the frequency band of 6.1-21.0GHz. In addition, owing to the standing-up lattice structure, the averaged optical transmittance of our ADMM reaches the optimal value of around 82.1% in the visible wavelength range of 380-780nm, promising an excellent optical transparency. The proposed comprehensive scheme provides an effective way to achieve broadband scattering suppression and high compatibility with optical transparency, enabling a wide range of applications in the window glass of stealth armament, electromagnetic compatibility facility and photovoltaic solar device.
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Ren J, Yin JY. 3D-Printed Low-Cost Dielectric-Resonator-Based Ultra-Broadband Microwave Absorber Using Carbon-Loaded Acrylonitrile Butadiene Styrene Polymer. MATERIALS 2018; 11:ma11071249. [PMID: 30036968 PMCID: PMC6073229 DOI: 10.3390/ma11071249] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 07/09/2018] [Accepted: 07/12/2018] [Indexed: 11/22/2022]
Abstract
In this study, an ultra-broadband dielectric-resonator-based absorber for microwave absorption is numerically and experimentally investigated. The designed absorber is made of the carbon-loaded Acrylonitrile Butadiene Styrene (ABS) polymer and fabricated using the 3D printing technology based on fused deposition modeling with a quite low cost. Profiting from the fundamental dielectric resonator (DR) mode, the higher order DR mode and the grating mode of the dielectric resonator, the absorber shows an absorptivity higher than 90% over the whole ultra-broad operating band from 3.9 to 12 GHz. The relative bandwidth can reach over 100% and cover the whole C-band (4–8 GHz) and X-band (8–12 GHz). Utilizing the numerical simulation, we have discussed the working principle of the absorber in detail. What is more, the absorption performance under different incident angles is also simulated, and the results indicate that the absorber exhibits a high absorptivity at a wide angle of incidence. The advantages of low cost, ultra-broad operating band and a wide-angle feature make the absorber promising in the areas of microwave measurement, stealth technology and energy harvesting.
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Affiliation(s)
- Jian Ren
- Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China.
| | - Jia Yuan Yin
- School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China.
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11
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Zhao J, Wei S, Wang C, Chen K, Zhu B, Jiang T, Feng Y. Broadband microwave absorption utilizing water-based metamaterial structures. OPTICS EXPRESS 2018; 26:8522-8531. [PMID: 29715818 DOI: 10.1364/oe.26.008522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 03/20/2018] [Indexed: 06/08/2023]
Abstract
In this paper, broadband microwave absorbers utilizing water-based metamaterial structure elements have been proposed and investigated. We employ water into the metamaterial structure unit-cell of the absorber as primary resonant elements such as the water-droplet, or water-tube structure. By investigating the resonant modes and the coupling between the water elements and the surrounding dielectrics, it is found the inherent multi-resonance of the proposed metamaterial structures could result in a broadband microwave absorption. For water-droplets design, 90% microwave absorption has been achieved from 7.5 GHz to 15 GHz, while for water-tube design, a much broader bandwidth from 5 GHz to 15 GHz is obtained for nearly 90% microwave absorption. The broadband absorption performance has been verified by both full wave simulation and experimental measurement. We believe the proposed broadband water-based absorber may find some applications in microwave stealth and electromagnetic compatibility technology.
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Electromagnetic wave absorption and compressive behavior of a three-dimensional metamaterial absorber based on 3D printed honeycomb. Sci Rep 2018; 8:4817. [PMID: 29556106 PMCID: PMC5859276 DOI: 10.1038/s41598-018-23286-6] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/08/2018] [Indexed: 11/23/2022] Open
Abstract
Lightweight structures with multi-functions such as electromagnetic wave absorption and excellent mechanical properties are required in spacecraft. A three-dimensional metamaterial absorber consisting of honeycomb and resistive films was proposed and fabricated through 3D printing and silk-screen printing technology. According to simulation and experiment results, the present three-dimensional metamaterial absorber can realize an absorptivity of more than 90% in a wide band of 3.53–24.00 GHz, and improve absorbing efficiency for transverse magnetic (TM) waves of oblique incidence angle from 0° to 70°. The compression test results reveal that compressive strength of the 3D printed honeycomb can reach 10.7 MPa with density of only 254.91 kg/m3, and the energy absorption per volume Wv and per unit mass Wm are 4.37 × 103 KJ/m3 and 17.14 KJ/Kg, respectively. The peak compressive strength and energy absorption per mass are at least 2.2 and 3 times comparing to metallic lattice cores with the same density. Outstanding electromagnetic wave absorption and mechanical performance make the present three-dimensional metamaterial absorber more competitive in engineering applications.
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Shen Y, Zhang J, Pang Y, Zheng L, Wang J, Ma H, Qu S. Thermally Tunable Ultra-wideband Metamaterial Absorbers based on Three-dimensional Water-substrate construction. Sci Rep 2018. [PMID: 29535316 PMCID: PMC5849613 DOI: 10.1038/s41598-018-22163-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Distilled water has frequency dispersive characteristic and high value of imaginary part in permittivity, which can be seen as a good candidate of broadband metamaterial absorbers(MAs) in microwave. Here, an interesting idea based on the combination of water-substrate and metallic metamaterial in the three-dimensional construction is proposed, which can achieve outstanding broadband absorption. As a proof, the distilled water is filled into the dielectric reservoir as ultra-thin water-substrate, and then the water-substrates are arranged on the metal backplane periodically as three-dimensional water-substrate array(TWA). Simulation shows that the TWA achieves broadband absorption with the efficiency more than 90% from 8.3 to 21.0 GHz. Then, the trigonal metallic fishbone structure is introduced here between the water-substrate and the dielectric reservoir periodically as three-dimensional water-substrate metamaterial absorber(TWMA). The proposed TWMA could achieve ultra-broadband absorption from 2.6 to 16.8 GHz, which has increase by 64.8% in relative absorption bandwidth. Meanwhile, due to the participation of distilled water, the thermally tunable property also deserves to be discussed here. In view of the outstanding performance, it is worth to expect a wide range of applications to emerge inspired from the proposed construction.
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Affiliation(s)
- Yang Shen
- College of Science, Air Force Engineering University, Xi'an, Shaanxi, 710051, People's Republic of China.
| | - Jieqiu Zhang
- College of Science, Air Force Engineering University, Xi'an, Shaanxi, 710051, People's Republic of China
| | - Yongqiang Pang
- College of Science, Air Force Engineering University, Xi'an, Shaanxi, 710051, People's Republic of China.,School of Electronics and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, People's Republic of China
| | - Lin Zheng
- College of Science, Air Force Engineering University, Xi'an, Shaanxi, 710051, People's Republic of China
| | - Jiafu Wang
- College of Science, Air Force Engineering University, Xi'an, Shaanxi, 710051, People's Republic of China
| | - Hua Ma
- College of Science, Air Force Engineering University, Xi'an, Shaanxi, 710051, People's Republic of China
| | - Shaobo Qu
- College of Science, Air Force Engineering University, Xi'an, Shaanxi, 710051, People's Republic of China.
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Shen Y, Zhang JQ, Pang YQ, Zheng L, Wang JF, Ma H, Qu SB. Three-Dimensional Resistive Metamaterial Absorber Loaded with Metallic Resonators for the Enhancement of Lower-Frequency Absorption. MATERIALS 2018; 11:ma11020210. [PMID: 29385693 PMCID: PMC5848907 DOI: 10.3390/ma11020210] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/16/2018] [Accepted: 01/24/2018] [Indexed: 11/16/2022]
Abstract
Resistive patch array incorporating with metallic backplane provided an effective way to achieve broadband metamaterial absorbers (MAs) in microwave frequency, and the outstanding construction contributed more flexible and diversified broadband absorption. In this paper, we attempted to load metallic resonators (MRs) to three-dimensional resistive MA to further enhance the lower-frequency absorption performance. Simulation showed that the partial absorption peak was separated to the lower frequency, while the rest of broadband absorption was unaffected. Meanwhile, after combining multi-unit of the proposed MAs, the stair-stepping broadband absorption was also achieved. Finally, three samples were fabricated. The agreements between simulations and experimental results demonstrated that resistive MA loaded with MRs provided an effective way for further enhancement of lower-frequency absorption with almost no change of the absorbing structure and lightweight characteristic. Thus, it was worthy to expect a wide range of applications to emerge inspired from the proposed attempt.
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Affiliation(s)
- Yang Shen
- College of Science, Air Force Engineering University, Xi'an 710051, China.
| | - Jie Qiu Zhang
- College of Science, Air Force Engineering University, Xi'an 710051, China.
| | - Yong Qiang Pang
- College of Science, Air Force Engineering University, Xi'an 710051, China.
- School of Electronics and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Lin Zheng
- College of Science, Air Force Engineering University, Xi'an 710051, China.
| | - Jia Fu Wang
- College of Science, Air Force Engineering University, Xi'an 710051, China.
| | - Hua Ma
- College of Science, Air Force Engineering University, Xi'an 710051, China.
| | - Shao Bo Qu
- College of Science, Air Force Engineering University, Xi'an 710051, China.
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15
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Chen L, Ke X, Guo H, Li J, Li X, Zhou L. Broadband wave plates made by plasmonic metamaterials. Sci Rep 2018; 8:1051. [PMID: 29348538 PMCID: PMC5773504 DOI: 10.1038/s41598-018-19611-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 01/03/2018] [Indexed: 11/09/2022] Open
Abstract
Although metamaterials wave-plates have been demonstrated previously, many of them suffer from the issue of narrow bandwidth since they typically rely on resonance principles and thus exhibit inevitable frequency dispersions. Here, we show that the dispersion of spoof surface plasmon (SSP) mode supported by a fishbone structure can be freely modulated by varying the structural parameters. This motivates us to establish a general strategy of building broadband wave-plates by cascading two fishbone structures with different propagation constants of SSP modes. We derive a criterion under which the cross-polarization phase-difference across the whole device can maintain at a nearly constant value over a wide frequency band, with frequency dispersions in the two fishbone structures cancelled out. As an illustration, we design and fabricate an efficient microwave quarter-wave plate and experimentally characterize its excellent polarization-control performances over a broad frequency band (7-9.2 GHz). Our findings can stimulate making dispersion-controlled high-performance optical functional devices in different frequency domains.
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Affiliation(s)
- Lin Chen
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Xianmin Ke
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Huijie Guo
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai, 200433, China
| | - Junhao Li
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Xun Li
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Lei Zhou
- State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai, 200433, China.
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