Article
Optics
Rui Zhang, Bing You, Shengchuan Wang, Kui Han, Xiaopeng Shen, Weihua Wang
Summary: The proposed broadband and switchable terahertz polarization converters based on graphene metasurfaces exhibit high efficiency in polarization conversion through parameter optimization, making significant progress in THz technology and device applications.
Article
Engineering, Electrical & Electronic
Chengchu Wu, Fengxi Zhang
Summary: This paper proposes a bi-functional switchable broadband terahertz metasurface ground design based on U-shaped vanadium dioxide and graphene. The design can effectively switch between absorption and reflection modes through the regulation of two parameters, providing additional options for integrated, intelligent, and miniaturized devices.
JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Tianli Dong, Ying Zhang, You Li, Yupei Tang, Xunjun He
Summary: A dual-function switchable terahertz (THz) device is proposed, which enables dynamic switching between broadband absorption and polarization conversion based on the phase transition of vanadium di-oxide (VO2). By manipulating the conductivity of photosensitive silicon, dynamic modulation of the amplitude in both functions is achieved simultaneously. The device consists of seven layers, and in the metallic phase of VO2, it acts as a broadband absorber with a relative bandwidth of 80% in the frequency range of 0.78-1.81 THz. When VO2 is in the insulating phase, the device functions as a polarization converter with a cross-polarization conversion ratio over 90% and a relative bandwidth up to 96% in the frequency range of 0.51-1.45 THz. The device offers a wide range of possible applications in sensors, detectors, solar cells, etc., due to its dynamic switching between functions and dynamic tuning of performance.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yujie Zhong, Yi Huang, Shuncong Zhong, Tingting Shi, Fuwei Sun, Tingling Lin, Qiuming Zeng, Ligang Yao, Xuefeng Chen
Summary: This study achieves frequency-agile absorption adjustments by utilizing the coupling between total reflection prism and electrically-driven MoS2. The redistribution of electric field and susceptible dielectric response are found to be attributed to limited spatial near-field perturbation. The study also demonstrates that perturbed MoS2 plasmon modes promote the formation of dual-phase singularities to suppress attenuation of absorption amplitude, extending the relative tuning range.
Article
Materials Science, Multidisciplinary
Xuejun Lian, Mengting Ma, Jinping Tian, Rongcao Yang
Summary: This paper presents a switchable metamaterial device with dual function based on vanadium dioxide (VO2) and graphene. VO2 can transition from the insulating state to the metallic state under external stimulation, and graphene's conductivity can be controlled by adjusting its bias voltage. The research results show that this device outperforms some of the reported devices in the literature.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Optics
Y. U. J. I. A. O. Wen, Y. U. N. P. I. N. G. Qi, L. Wang, Z. I. H. A. O. Zhou, H. A. O. W. E. N. Chen, S. H. I. Y. U. Zhao, X. I. A. N. G. X. I. A. N. Wang
Summary: A multifunctional terahertz absorber based on a hybrid configuration of vanadium dioxide (VO2) and graphene is introduced, capable of switching between ultrabroadband and double-narrowband absorption characteristics using the phase-shifting property of VO2. The absorption can be adjusted by changing the conductivity of VO2 through temperature and the Fermi energy level of graphene. The proposed absorber has potential applications in optical switching, image processing, and stealth technology.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Optics
Yan Liu, Rui Huang, Zhengbiao Ouyang
Summary: An absorber based on hybrid metamaterial with vanadium dioxide and graphene achieves dynamically switchable dual-broadband absorption in the terahertz regime by controlling the phase transition of vanadium dioxide and the Fermi energy level of graphene. The absorber can achieve high absorptance in high-frequency broadband and low-frequency broadband, with the absorption intensity being continuously adjustable by electrically controlling the Fermi energy level of graphene. The absorption window can be further broadened by adjusting geometrical parameters, making the absorber suitable for applications such as filtering, sensing, cloaking objects, and switches in the terahertz regime.
Article
Physics, Applied
Junsa Du, Lianwen Deng, Leilei Qiu, Chao Tang, Chen Li, Yuhan Li, Xiaohui Gao, Shengxiang Huang
Summary: In this paper, two ultrathin polarization conversion metasurfaces (PCMs) were designed to convert linear polarized waves to orthogonal polarization counterpart. The degenerate modes were controlled to enhance selectivity. The PCM demonstrated efficient cross-polarization conversion in specific frequency ranges, making it a promising technology for controlling the polarization state of microwaves.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Mingjia Xing, Yunjie Teng
Summary: A dual-functional terahertz metamaterial device is proposed based on the temperature-controlled phase change properties of vanadium dioxide (VO2). The device can switch between an absorber and a polarization converter. Simulation results show that the device acts as a terahertz wave absorber in the metallic state of VO2, with a reflected extinction ratio of less than -15 dB in the frequency range of 1.07-1.19 THz. When VO2 is in the insulated state, the device functions as a polarization converter, achieving a polarization conversion rate of over 90% in the frequency range of 1.43-1.51 THz. The proposed device has broad applicability in terahertz detection, modulation, and switching.
Article
Optics
Shenglin Xie, Hailiang Zhu, Yuxin Zhou, Miao Yu, Jinchao Mou, Lin Liu, Yujie Di, Gengchen Wang
Summary: This paper proposes a reconfigurable metasurface with absorption and polarization conversion capacities, utilizing the phase transition characteristics of vanadium dioxide. The metasurface achieves high absorption rates and cross-polarization conversion rates, making it suitable for various applications.
Article
Multidisciplinary Sciences
Andriy E. Serebryannikov, Akhlesh Lakhtakia, Guy A. E. Vandenbosch, Ekmel Ozbay
Summary: Metasurfaces made of thermally tunable metal-free (double-)split-ring meta-atoms and metal-free grids made of vanadium dioxide can switch between polarization manipulation, asymmetric transmission, and other functions in the terahertz regime. Numerical simulations show that functionality switching is possible even with vanadium dioxide components only.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Xuzheng Zhu, Yongzhi Cheng, Junpeng Fan, Fu Chen, Hui Luo, Ling Wu
Summary: This paper proposes and numerically investigates a graphene metasurface based on split-ring resonators (SRRs) structure, which can achieve highly efficient switchability of anomalous refraction and planar focusing effects. Numerical simulation results show that the proposed metasurface can realize polarization conversion with a transmission amplitude of about 0.4 and achieve a full 2 pi phase shift by changing the geometrical parameters of the SRRs structure. Furthermore, the efficiency of cross polarization transmission is highly dependent on the Fermi energy level of graphene. By designing a spatially phase profile and arrangement of unit-cell structure, anomalous refraction and planar focusing effect can be achieved, with the efficiencies switched by changing the Fermi energy level rather than the physical size.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Yi Ren, Bin Tang
Summary: This paper presents a multi-functional terahertz metamaterial device based on gold and vanadium dioxide, showcasing switchable performance between perfect absorption and broadband asymmetric transmission. The device demonstrates high efficiency in absorption and transmission, as well as perfect polarization conversion.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Lijun Guo, Kun Zhang, Xingrun Zhang, Bingyu Chen, Weijin Kong
Summary: The integration of active materials into a metasurface for tunable devices has attracted attention. This study presents an Au-VO2 hybrid metasurface that can switch between quarter-wave plate and half-wave plate by utilizing the phase transition of VO2. The metasurface exhibits different functionalities at different temperatures, enabling the conversion between linear polarization and circular polarization, as well as the preservation of reflective chirality and cross-polarization conversion. This research provides a new approach for the application of tunable broadband metasurfaces in polarization and phase manipulation of terahertz waves.
Article
Materials Science, Multidisciplinary
Jin Yang, Jun Chen Ke, Wen Kang Cao, Ming Zheng Chen, Qiang Cheng, Vincenzo Galdi, Tie Jun Cui
Summary: A time-division-multiplexing metasurface is proposed to achieve simultaneous conversion of polarization and frequency, utilizing time-modulated polarization switches to rotate polarization at the central frequency and synthesize various polarization states at selected harmonic frequencies. The theoretical predictions were validated through measurements on a prototype operating at microwave frequencies, marking the first experimental evidence of simultaneous polarization and frequency conversions via this approach. This innovation opens up a new avenue for controlling electromagnetic waves through time-varying metasurfaces, with potential applications ranging from polarization imaging to quantum optics.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
You-Feng Cheng, Xiao Ding, Lin Peng, Ju Feng, Cheng Liao
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2020)
Article
Engineering, Electrical & Electronic
Zhi-peng Li, Lin Peng, Jing Ma, Bin Shi, Qi-xiang Zhao, Xing Jiang, Si-min Li
IET MICROWAVES ANTENNAS & PROPAGATION
(2020)
Article
Computer Science, Interdisciplinary Applications
Lin Peng, Bing-Zhong Wang, Xing Jiang, Si-min Li, Cheng-li Ruan
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
(2020)
Article
Engineering, Electrical & Electronic
Xiao Liu, Lin Peng, Yan-fang Liu, Wei-sheng Yu, Qi-xiang Zhao, Xing Jiang, Si-Min Li, Chengli Ruan
Summary: An ultra broadband all-dielectric transmitarray antenna was designed using genetic algorithm optimization and 3D print fabrication technology, achieving good transmission performance and broadband phase compensation. The all-dielectric structure is easy to manufacture and can enhance radiation gain.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Physics, Fluids & Plasmas
Qixiang Zhao, Jinjun Feng, Shuquan Zheng, Lin Peng, Xing Jiang, You Lv, E'feng Wang
Summary: A frequency-tunable THz gyrotron with a high-quality factor iris cavity is designed in this article, allowing for tuning at different frequency ranges with specific parameters adjustments for different output power and frequency tuning ranges. Comparison with 3D particle software confirmed the designed frequency and power tuning ranges.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2021)
Article
Computer Science, Interdisciplinary Applications
Lin Peng, Bing-Zhong Wang, Bo Wang, Xing Jiang, Si-min Li, Cheng-li Ruan
Summary: This research aims to enhance the bandwidth of the antenna by utilizing low Q factor and multi-resonance techniques, while applying polarization compensation technique to improve the axial ratio bandwidth, achieving improvements for low-profile, omni-directional, and circularly polarized antenna designing.
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Yan-Ru Hua, Lin Peng, Tian-Cheng Zheng, Zhi-Hua Zhao, Bo Wang, Xing Jiang, Si-Min Li
Summary: A high-gain Fabry-Perot cavity antenna with wide 1 dB gain bandwidth in the S-band is proposed in this study. By using a partially reflective surface with a positive phase gradient, the radiation characteristics of the broadband source antenna are effectively improved. The proposed FPCA showed an enhanced gain of up to 6 dB and a maximum aperture efficiency of 393% in a wideband range.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
You-Feng Cheng, Cheng Liao, Guo-Feng Gao, Lin Peng, Xiao Ding
Summary: The paper introduces a planar phased array with enhanced reflection bandwidth, wide-angle scan, and broadband low backscattering. By utilizing dual-resonance elements and a coding metasurface, the array achieves wide-beam coverage and reduced scattering.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Wei-sheng Yu, Lin Peng, Yan-fang Liu, Qi-xiang Zhao, Xing Jiang, Si-min Li
Summary: This letter proposes a lens antenna with ultrawide band and high aperture efficiency, automatically designed by genetic algorithm and finite-different time-domain method. Compared to feeding ridged horn, the lens antenna shows enhanced gains and aperture efficiencies in the 6-18 GHz band, suitable for communication applications.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Yan-Fang Liu, Lin Peng, Wei Shao
Summary: An efficient knowledge-based artificial neural network (KBANN) is proposed for the design of circularly polarized (CP) lens antenna. The KBANN model includes a forward neural network (FNN) and an inverse neural network (INN), where INN is the main component used to predict the antenna structure parameters. By introducing FNN to provide prior knowledge for INN, the problem of multiple performance indices in antenna design is solved. A CP lens antenna with wideband, good axial ratio, and high gain is designed and fabricated to demonstrate the effectiveness of the KBANN model.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Qian-kun Xu, Zhong-nan Zhang, Xiao-hua Wu, Jue-zhe Wang, Lin Peng
Summary: This paper presents a novel compact S-band band-pass filter with ultra-wide stopband. The proposed filter is composed of a crossed resonator, parallel-coupled microstrip lines, and defect ground structures (DGSs). Through the use of innovative design structures, the filter achieves compactness, low insertion loss, and good stopband characteristics.
Article
Engineering, Electrical & Electronic
Yan-Fang Liu, Lin Peng, Chen Wang, Xue-Mei Zheng, Qian-Kun Xu, Hao-Kai Jia, Cheng-Li Ruan, Si-Min Li
Summary: An automatic synthesis algorithm is utilized to optimize multiperformance indices of an E-band three-dimensional (3-D)-printed all-dielectric lens antenna. Hybridizing particle swarm optimization and genetic algorithm optimization allows for fast optimization and avoidance of local optimum, while defining multiple subfunctions to achieve multiperformance indices.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Zhi-Xian Liu, Wei Shao, Xiao Ding, Lin Peng, Baojun Jiang
Summary: This letter introduces the Fourier series as a transfer function in the artificial neural network for parametric modeling of microwave filters. The proposed Fourier series-based transfer function is more efficient and involves fewer coefficients compared to the pole-residue-based transfer function. The effectiveness of this method is verified through an example of an ultrawideband filter.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Haokai Jia, Jinjun Mo, Lin Peng
Summary: This paper proposes an ultra-wideband dual-polarized antenna that covers multiple communication standards. The antenna consists of two perpendicular dipoles that generate +45 degrees/-45 degrees linear polarizations. By utilizing a dual-loop structure and parasitic patches, the antenna achieves a wide impedance bandwidth, high isolation, and low cross-polarization.
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Yang Hong, Wei Shao, Yan-He Lv, Bing-Zhong Wang, Lin Peng, Baojun Jiang
Summary: In this communication, an efficient artificial neural network (ANN) model considering mutual coupling effects is proposed to accelerate the process of designing finite thinned arrays. The model divides array elements into three categories based on the active element pattern (AEP) technique and constructs subarrays to extract the AEP of each category as training samples. By taking into account mutual coupling between elements and utilizing a prior knowledge input technique, the proposed model avoids the calculation of the radiation pattern of the entire array and improves modeling performance. Numerical examples verify the efficiency of the proposed scheme using different types of thinned arrays.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)