Article
Materials Science, Multidisciplinary
Wei Cui, Yixuan Wang, Jingjing Xue, Zhihui He, Hui He
Summary: The Fano resonance in a simple graphene metamaterial was investigated using the finite-difference time-domain (FDTD) method. The results show that the transmission spectra of the Fano resonance can be tuned by the Fermi level and carrier mobility, with the proposed graphene metamaterial showing potential for sensing applications in the terahertz band with a high Figure of Merit (FoM) reaching up to 106.92. This proposal may lead the way for designing graphene-based terahertz sensing applications.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Yao Wen, Kunlin Chen, Yu-Sheng Lin
Summary: The study introduces two tunable terahertz metamaterial resonators, TTM-1 and TTM-2, which can modulate resonant frequency by moving the metal frame, with tuning ranges of 0.19 THz and 0.79 THz respectively. The devices also demonstrate anti-inference capability by transversely moving the metal frame.
RESULTS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Yun Wang, Shengyao Jia, Jianyuan Qin
Summary: This study demonstrates the excitation of Fano resonances in metamaterials by introducing position and gap asymmetry, allowing for tunability of resonance frequency and potential sensing applications.
FRONTIERS IN PHYSICS
(2021)
Article
Multidisciplinary Sciences
H. Q. Nguyen, Q. Wu, H. Chen, J. J. Chen, Y. K. Yu, S. Tracy, G. L. Huang
Summary: An ultra-broadband acoustic barrier assembled from space-coiling metamaterials supporting two Fano resonances is reported, with additional thin viscous foam layers for acoustic hyper-damping. Experimental results show over 10 dB reduction in noise transmission loss across a specific range, along with unconventional broadband absorption observed in the dampened barrier.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Yuying Lu, Tengteng Li, Maosheng Yang, Haiyun Yao, Lanju Liang, Xin Yan, Kai Kai Lv, Meng Wang, Qili Yang, Chaoyang Wei, Jianda Shao, Jianquan Yao
Summary: The study demonstrates dual control of multi-band Fano resonances with a metal-halide perovskite-integrated terahertz metasurface by lasers and an electrical field, achieving ultrasensitive optoelectronic modulation, showing promising application prospects.
Article
Materials Science, Multidisciplinary
Jing Xu, Quanhong Fu, Yuancheng Fan, Jiameng Nan, Fuli Zhang
Summary: Thermally reconfigurable Fano resonance based on water metamaterial can be achieved by modulating the resonance frequency and breaking the symmetry through adjusting the water temperature.
RESULTS IN PHYSICS
(2021)
Article
Optics
Reena Reena, Yogita Kalra, Ajeet Kumar
Summary: This paper reports the phenomena of electromagnetically induced transparency in a metal-dielectric structure, providing a platform for high-quality factor Fano resonance in the terahertz region. By utilizing electric and magnetic dipoles in the metal and dielectric components, two resonance dips with high-quality factors were achieved, showing potential for the design and development of metamaterial-based sensing devices and biosensors.
Article
Physics, Multidisciplinary
Zhuchuang Yang, Yangkuan Wu, Wei Xu, Huaxin Zhu, Xiangyang Zhang, Ben-Xin Wang
Summary: In this paper, a bi-functional metamaterial resonance device operating at terahertz frequency is designed, which combines plasmon-induced transparency (PIT) and Fano-like response. The device is composed of three metallic strips, with two parallel strips and one deviated strip from the center position. The horizontal metallic strip plays a crucial role in adjusting the resonance response, and the device can effectively switch from bi-functional resonance to single-functional PIT effect with a certain deviation value. This proposed structure can serve as a valuable platform for inspiring the design of novel electro-optic devices.
Article
Physics, Applied
Weiqi Cai, Yuancheng Fan, Quanhong Fu, Ruisheng Yang, Wei Zhu, Yujing Zhang, Fuli Zhang
Summary: In this work, a hybrid metamaterial exhibiting extraordinary optical transmission (EOT) behavior was theoretically and experimentally studied. The transmission amplitude and frequency can be modulated by utilizing the first-order Mie-resonant mode and the nonlinear effect of the dielectric cuboid.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Instruments & Instrumentation
Jingwei Wu, Xieyu Chen, Kemeng Wang, Xueqian Zhang, Yanfeng Li, Huabin Wang, Jiaguang Han
Summary: Metamaterial-based Fano resonances offer promising potential for the design of sensors, lasers, and slow light devices in the terahertz band. This study presents a novel Fano resonance metamaterial design to manipulate waveguide modes in a parallel plate waveguide, enabling flexible adjustment of interaction length and intensity control of the Fano resonance. Additionally, thin-film sensing of a monolayer graphene film using the proposed Fano resonance metamaterials was demonstrated, indicating potential for future practical devices in waveguide systems and wider applications of Fano resonances.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yan Huang, Yan Liu, Yao Shao, Genquan Han, Jincheng Zhang, Yue Hao
Summary: An ultrasensitive THz sensor composed of sub-wavelength bowtie black phosphorus and an annular gold ring is proposed, which generates a Fano-type resonance. By adjusting the geometry dimensions and Fermi level, a high FOM value and maximum sensitivity are achieved, making it suitable for biochemical nano-sensing applications based on Fano resonance at THz frequency.
Article
Materials Science, Multidisciplinary
Tianyu Xiang, Tao Lei, Jianwei Wang, Jiong Wu, Man Peng, Helin Yang
Summary: The study demonstrates the implementation of a toroidal dipole using water with a high dielectric constant in the microwave range. It achieves a Fano resonance with a high Q-factor, and the energy concentration in water is attributed to the intriguing toroidal dipole. The impact of toroidal excitation on transmission characteristics is discussed for different parameters and conductivity. This research has significant implications for designing ultra-sensitive sensors, absorbers, and slow-light devices.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Physics, Applied
Subhajit Karmakar, Ravi Varshney, Dibakar Roy Chowdhury
Summary: This study proposes enhancing effective responses in sub-skin depth metasurfaces through magneto-transport concept, and demonstrates dynamic magnetic modulation of structurally asymmetric metasurfaces in the terahertz domain. The introduction of magnetically reconfigurable ability in Fano resonant THz metamaterials improves their performances in the sub-skin depth regime.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Zijie Gao, Yanpeng Shi, Meiping Li, Jinmei Song, Xiaoyu Liu, Xiaodong Wang, Fuhua Yang
Summary: Tunable extraordinary optical transmission (EOT) with graphene is achieved in the terahertz frequency regime using a novel metallic ring-rod nested structure, leading to the generation of double-enhanced transmission peaks primarily originating from the excitation of localized surface plasmon resonances (LSPRs). By regulating the Fermi energy (E-f) of the graphene, an adjustment from bimodal EOT to unimodal EOT is obtained, demonstrating promising application prospects in frequency-selective surfaces, communication, filtering, and radar.
Article
Chemistry, Multidisciplinary
Lilit Gevorgyan, Hovhannes Haroyan, Henrik Parsamyan, Khachatur Nerkararyan
Summary: We propose a simple design of an ultra-broadband metamaterial absorber (MMA) for terahertz (THz) radiation based on vanadium dioxide (VO2) configurations. The MMA consists of orderly distributed VO2 strips, a dielectric spacer, and an Au reflector. The absorption properties of an individual VO2 strip are characterized using theoretical analysis, and the results are used to design the MMA. It is shown that the MMA exhibits efficient absorption in a broad spectrum of 0.66-1.84 THz, with an absorption band relative to the center frequency reaching as high as 94.4%. Wide polarization and incidence angle tolerance are achieved by adding an identical parallel layer rotated by 90 degrees. The absorption mechanism of the structure is elucidated using interference theory, and the possibility of modulating the electromagnetic response of the MMA is demonstrated based on the tunable THz optical properties of VO2.
Article
Public, Environmental & Occupational Health
Yanxiao Ren, Jianfeng Cai, Ho Cheung, Hongyu Shao, Kunwa Au, Tszpong Chow, Weijia Wen, Li Ling, Shuyu Chen
Summary: This study proposed a low-cost and easy-to-operate testing protocol to evaluate the long-term antimicrobial performance of a novel WOx paint. The analysis of microbial activity on walls with and without the WOx paint showed that the WOx paint demonstrated effective reduction of microbial activities in the long-term.
AMERICAN JOURNAL OF INFECTION CONTROL
(2022)
Article
Instruments & Instrumentation
Hanqi Xu, Jinbo Wu, Yaying Hong, Weijia Wen
Summary: This study demonstrates the impact of diester structure, specifically alkyl chain length and branching structure, on the giant electrorheological (GER) effect and suspension stability. The results show that longer chain lengths facilitate the formation of particle agglomerates, while the attachment of branches improves GER performance and suspension stability.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
Zheng Yang, Gang Wang, Ziqun Yuan, Ziqiu Wang, Jinbo Wu, Mengying Zhang, Wenjia Wen
Summary: A microfluidic device with a microvalve incorporated with intelligent giant electrorheological fluid (GERF) is proposed for actively and accurately controlling micro-droplet merging. The device has simple fabrication process and excellent application prospects.
Review
Physics, Applied
Sichao Qu, Ping Sheng
Summary: This review provides insights into the absorption mechanisms in microwave and acoustic systems, focusing on the wave-absorption metamaterials. It presents a universal model for resonance-based metamaterials, discusses the theoretical conditions for broadband impedance matching and introduces the fundamental causal limit as an evaluation tool for absorption performance. The review also highlights recent advances in metamaterial absorption and discusses the challenges and potential solutions.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Nan Gao, Zhen Dong, Ho Yiu Mak, Ping Sheng
Summary: The paper proposes the design of a flat active wall panel and demonstrates its effectiveness in modulating the wall impedance. By varying the displacement amplitude of the active panel, it can achieve impedance changes from total sound absorption to reflection phase reversal. The active-panel device does not require a feedback loop and has potential applications in room acoustics.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
M. Mallejac, P. Sheng, V Tournat, V Romero-Garcia, J-P Groby
Summary: In this paper, a passive treatment method that considers the time domain and multiple reflections is proposed. A delay line is designed using slow-sound propagation in periodic structures, allowing the reproduction of sound perception over a larger distance. The limitations of real-time pulse propagation, dispersion, and losses on audio fidelity are also discussed.
PHYSICAL REVIEW APPLIED
(2022)
Article
Multidisciplinary Sciences
Sichao Qu, Nan Gao, Alain Tinel, Bruno Morvan, Vicente Romero-Garcia, Jean-Philippe Groby, Ping Sheng
Summary: By using a structured tungsten-polyurethane composite, we have designed and experimentally realized an underwater acoustic absorber with high absorption capability in the frequency range of 4 to 20 kHz, measured in a 5.6 m by 3.6 m water pool. The broadband functionality is achieved through optimizing the distribution of Fabry-Perot resonances.
Article
Materials Science, Multidisciplinary
Zeng Kai, Liang YuDai, Zhang BaoRong, Shi Quan, Wu JinBo, Wen WeiJia
Summary: Thermochromic glass has the potential to reduce energy demand and provide indoor comfort in buildings. The suitable temperature change point of 42.9 degrees C for thermochromic glass has been found to effectively reduce room temperature in the summer and provide thermal insulation in the winter.
FRONTIERS IN MATERIALS
(2022)
Article
Physics, Applied
Zhen Dong, Ping Sheng
Summary: This article proposes a design for a vibrational energy-absorption device based on the concept of inertial amplification. The device utilizes coupling between translational and rotational motions to achieve ultralow-frequency resonance response. The compact and lightweight design offers flexibility and practical applications. Functional prototypes and simulations demonstrate the large inertial-amplification factor and the capability of vibrational total absorption across a comparatively broadband working frequency range.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Multidisciplinary
Ting Zhang, Haijing Zhang, Jie Pan, Ping Sheng
Summary: This study investigates the transport behavior of anti-dot graphene through theoretical analysis and experiments. A metal-to-insulator transition (MIT) in this two-dimensional system at a critical Fermi energy is identified and verified experimentally. Though both theory and experiment indicate the existence of the MIT, the values of the critical energy and localization length do not show quantitative agreement.
NEW JOURNAL OF PHYSICS
(2022)
Article
Multidisciplinary Sciences
Yang Meng, Vicente Romero-Garcia, Gwenael Gabard, Jean-Philippe Groby, Charlie Bricault, Sebastien Goude, Ping Sheng
Summary: In this study, sum rules for unidimensional scattering problems were derived using Herglotz function theory, providing important guidance for the design of passive absorbers and mufflers.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Chemistry, Physical
Xiaohui Deng, Ping Sheng
Summary: For incompressible channel flow, a critical state with a critical Reynolds number Re-c and a critical wavevector m(c) exists, which leads to the instability of the channel flow in the linear regime. This study explores the channel flow beyond the critical state and discovers a new fluctuating, quasi-stationary flow that combines laminar Poiseuille flow with a counter-flow component and vortices. The net flow rate is reduced by approximately 15% compared to the linear, laminar regime. The analytical solution of the linearized, incompressible, three-dimensional Navier-Stokes equation is used to gain insights into the counter-flow component and its distinct features from pressure-driven channel flows.
EUROPEAN PHYSICAL JOURNAL E
(2023)
Article
Physics, Applied
Min Yang, Ping Sheng
Summary: Acoustic metamaterials represent the combination of wave physics and designed geometric structures to achieve novel acoustic properties. This article aims to answer the important questions regarding the effectiveness and cost of metamaterial absorbers compared to traditional absorbing materials. It is shown that the tunability of absorption spectrum and minimum thickness requirement set by causal constraint make metamaterial absorbers advantageous. Despite the challenges of mass production cost, several commercialized applications of acoustic metamaterial absorbers are presented.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Cheng Dai, Maijia Liao, Xiaolin Li, Shuyu Chen, Ping Gao, Ping Sheng
Summary: This study reveals that the polar characteristic of water can be observed in confined nanoscale structures and can lead to the formation of macroscopic scale columns under an applied electric field. Experimental evidence supports the polar nature of these columns, which correlates with the electric field, and a phenomenological theory is proposed to explain the observations.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Chemistry, Physical
Yudai Liang, Yihao Liu, Yaozhong Zhou, Quan Shi, Mengying Zhang, Yancheng Li, Weijia Wen, Lingyan Feng, Jinbo Wu
Summary: In this study, an ERF was prepared by coupling surface-functionalized CD particles with biomimetic chestnut-like cobalt hydroxide (Co(OH)(2)@CDs), demonstrating exceptional electrorheological efficiency and stability.
