Article
Materials Science, Multidisciplinary
Qing Xiong, Honghao Yu, Ye Zhang, Xiangyu Gao, Changhong Chen
Summary: A broadband all-dielectric metasurface absorber was presented, with elliptical nanohole arrays embedded in the doped device layer of a silicon-on-insulator wafer, achieving enhanced near infrared absorption. Magnetic dipole resonances were found to predominantly contribute to the absorption enhancement through detailed multipole decomposition, and the large bandwidth was attributed to the superposition of multiple absorption peaks from the resonances. This simple absorber design, compatible with CMOS techniques, shows potential for broadband photodetectors of Si and even Ge, where photocarrier excitation originates from interband transitions in Ge-based photodetectors.
RESULTS IN PHYSICS
(2021)
Article
Multidisciplinary Sciences
Nanli Mou, Bing Tang, Jingzhou Li, Hongxing Dong, Long Zhang
Summary: Researchers have developed a thermally switchable terahertz metasurface that can achieve high transmission and ultra-broadband absorption at different temperatures, making it insensitive to the incident angle. The structure is highly scalable and has potential applications in areas such as optical switching, terahertz imaging, and filtering.
SCIENTIFIC REPORTS
(2022)
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
Chemistry, Multidisciplinary
Qinyu Qian, Peiqing Sun, Cheng Zhang, Tingting Liu, Haitao Chen, Fan Li, Liwen Cheng, Liang Zhao, Xiaofeng Li, Chinhua Wang
Summary: This paper presents the preparation and performance of an ultra-broadband metasurface perfect absorber based on TiN nanostructures, demonstrating a method to achieve high absorption in the UV to NIR region and simulating a TiN-TiO2 hot-electron photoelectric conversion system. This novel material holds promise for playing an important role in efficient hot-electron optoelectronic and photocatalytic systems.
Article
Optics
Baoku Wang, Ke Gai, Ruoxing Wang, Fei Yan, Li Li
Summary: This paper presents an interesting scheme of an ultra-broadband perfect terahertz (THz) absorber using a periodic-conductivity graphene metasurface. By modulating the conductivity of graphene in a periodic manner, the absorber can generate dense high-order resonance modes and achieve ultra-broadband continuous absorption. This scheme is significant for the development of broadband THz absorbers and has promising application prospects in THz stealth, imaging, and communication fields.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Yuwei Huang, Kelson Kaj, Chunxu Chen, Zhiwei Yang, Sheikh Rubaiat Ul Haque, Yuan Zhang, Xiaoguang Zhao, Richard D. Averitt, Xin Zhang
Summary: This article introduces a thin membrane silicon metasurface absorber that achieves very high absorption over a bandwidth of approximately 500 GHz. The absorber can be used in terahertz devices such as detectors, modulators, and switches.
Article
Green & Sustainable Science & Technology
Ahsan Sarwar Rana, Muhammad Zubair, Yifan Chen, Zeng Wang, Jie Deng, Muhammad Tariq Saeed Chani, Aaron Danner, Jinghua Teng, Muhammad Qasim Mehmood
Summary: We report the experimental results of a broadband metasurface solar absorber composed of refractory material chromium. The absorber exhibits high broadband absorptance and has the advantages of resistance to oxidation and corrosion, low cost, and stability at higher temperatures.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Ming Qin, Limin Zhang, Xiaoru Zhao, Hongjing Wu
Summary: In this study, lightweight Ni foam with NiO/NiFe2O4 in situ growth composites were fabricated to address the issues of poor dispersibility and chemical stability in metal-based electromagnetic wave absorbing materials. The foam structure and NiO/NiFe2O4/Ni components were found to synergistically enhance the EM wave absorption capacity. This work sheds light on the synergistic effect of structure and components on EM wave absorption behaviors, offering a new pathway for preparing lightweight and high-performance metal-based EM wave absorbers.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Fuyin Ma, Hao Zhang, Xingzhong Wang, Chongrui Liu, Jiu Hui Wu
Summary: A space-shift phase-coherent cancellation acoustic metasurface is proposed to achieve broadband low-frequency sound absorption. By using an ultra-thin integrated structure composed of multiple units with weak absorption capability, the large-size required for low-frequency absorption is transformed into an extremely thin space layer through a space-shift design. The proposed metasurface demonstrates excellent sound absorption performance with a compact design and a thickness limitation that satisfies most equipment requirements. Rating
Article
Physics, Applied
Junsa Du, Pin Zhang, Leilei Qiu, Xiaohui Gao, Shengxiang Huang, Longhui He, Lianwen Deng
Summary: In this study, a chaos patterned metasurface absorber (CPMA) with three strong absorption peaks and wide bandwidth was designed. The CPMA has a single-layer sandwich structure and enables continuous effective bandwidth by adjusting surface patterns. The absorption mechanisms mainly involve magnetic coupling resonance and dielectric loss.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Multidisciplinary
Shobhit K. Patel, Juveriya Parmar, Vijay Katkar, Fahad Ahmed Al-Zahrani, Kawsar Ahmed
Summary: This study proposes a metasurface solar absorber based on the phase-changing material Ge2Sb2Te5, which shows enhanced absorption in the visible, infrared, and ultraviolet regions. Machine learning algorithms are used to predict the absorption values for different wavelengths, and experimental results demonstrate the efficacy of using a lower K value for prediction accuracy.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Shreyas Charola, Shobhit K. Patel, Juveriya Parmar, Rajendrasinh Jadeja
Summary: We proposed an angle insensitive and broadband I-shaped metasurface-based resonator to enhance absorption in the visible region. By carefully selecting the structure parameters, a wideband absorption of more than 95% from 550 to 651THz is achieved. The absorber is simple in design and insensitive to oblique incidences, making it suitable for applications in solar cells and photonics sensors.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Physics, Applied
Chen Shao, Yuanzhou Zhu, Houyou Long, Chen Liu, Ying Cheng, Xiaojun Liu
Summary: In this paper, we propose a design methodology for an ultra-broadband sound absorber based on coupled-mode theory, and experimentally demonstrate its sound absorption performance. This has significant implications for acoustic engineering.
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Mostafa Abdelsalam, Mohamed A. Swillam
Summary: This study discusses a new structure of nanoprisms made of doped silicon that can act as an ultra-broadband absorber for thermo-electric generation. The effect of doping concentration and a pure silicon thin film on top of the prisms are also explored. An optimized structure is found that can absorb 92.6% of input power from 1 to 15 μm.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Qingze Tan, Bin Zheng, Tong Cai, Chao Qian, Rongrong Zhu, Xiaofeng Li, Hongsheng Chen
Summary: This study presents a simple broadband spin-locked retroreflector that uses a metasurface with low-loss dielectric resonators. The results show that the proposed metasurface achieves retroreflection over a broadband spectrum while maintaining the spin state identical. The study also validates a broadband spin-locked cloak. This work represents a major advancement in practical retroreflector research.
