A5100716651- Terahertz technology and applications
- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Photonic and Optical Devices
- Advanced Antenna and Metasurface Technologies
- Superconducting and THz Device Technology
- Spectroscopy and Laser Applications
- Plasmonic and Surface Plasmon Research
- Millimeter-Wave Propagation and Modeling
- Microwave Engineering and Waveguides
- Semiconductor Lasers and Optical Devices
- Advanced Computational Techniques and Applications
- Distributed and Parallel Computing Systems
- Advanced Chemical Sensor Technologies
- Physics of Superconductivity and Magnetism
- Spectroscopy and Chemometric Analyses
- Conducting polymers and applications
- Atomic and Molecular Physics
- Cloud Computing and Resource Management
- Advanced optical system design
- Water Quality Monitoring and Analysis
- Semiconductor Quantum Structures and Devices
- Microwave Dielectric Ceramics Synthesis
- Advanced Chemical Physics Studies
- Ferroelectric and Piezoelectric Materials
Nanjing University
2012-2025
Nanjing Forestry University
2007-2024
Wuhan University
2020
Chinese Academy of Sciences
2011-2019
Changchun Institute of Optics, Fine Mechanics and Physics
2019
Shandong Normal University
2016
State Grid Corporation of China (China)
2016
China University of Petroleum, Beijing
2014
University of New Brunswick
2012
Kyushu University
2010
Microwave dielectric ceramics exhibiting a low constant (εr), high quality factor (Q × f), and thermal stability, specifically in an ultrawide temperature range (from -40 to +120 °C), have attracted much attention. In addition, the development of 5G communication has caused urgent demand for electronic devices, such as resonant antennas. Hence, feasibility optimizing properties SmNbO4 (SN) by substituting Bi3+ ions at A site was studied. The permittivity principally hinges on contribution...
Reconfigurable intelligent surfaces (RISs) play an essential role in various applications, such as next-generation communication, uncrewed vehicles, and vital sign recognizers. However, the terahertz (THz) region, development of RISs is limited because lacking tunable phase shifters low-cost sensors. Here, we developed integrated self-adaptive metasurface (SAM) with THz wave detection modulation capabilities based on change material. By applying coding sequences, could deflect beams over...
Label-free, real-time, and in-situ measurement on cell apoptosis is highly desirable in biology. We propose here a design of terahertz (THz) metamaterial-based biosensor for meeting this requirement. This metamaterial consists planar array five concentric subwavelength gold ring resonators 10 μm-thick polyimide substrate, which can sense the change dielectric environment above metamaterial. employ sensor to an oral cancer (SCC4) with without cisplatin, chemotherapy drug treatment, find...
A mid-infrared Er doped CaF2 crystal was successfully grown by the bridgeman method. Efficiently continuous wave and Q-switched laser operations were demonstrated at 2.8 μm with a 4 at.% end-pumped fiber-coupled 974 nm diode laser. The output power of 295 mW obtained in compact linear cavity. stable passively Er:CaF2 also graphene saturable absorber. Under an absorbed pump 2.353 W, average 172 generated pulse duration 1.324 μs repetition rate 62.70 kHz, corresponding to single energy 2.74 μJ...
Abstract High efficiency, high frequency, selectivity characteristics and low latency of dielectric resonator antennas (DRA) for frequency are challenges which must be addressed simultaneously in 5G communication. To overcome these difficulties, new Sm(Nb 1− x P )O 4 (SNP@x, 0.1 ≤ 0.4) ceramics prepared demonstrated that 5+ effectively enhances microwave properties. Reduction permittivity (ɛ r ) was co‐dominated by the ionic polarizability secondary phase SmPO with ɛ . Quality factor ( Q × f...
As an ingredient of great economic value, Tricholoma matsutake has received widespread attention. However, heavy metal residues and preservatives in it will affect the quality endanger health consumers. Here, we present a method for simultaneous detection low concentrations potassium sorbate lead matsutakes based on surface-enhanced Raman spectroscopy (SERS) fluorescence (FLU) to test safety consumption. Data fusion strategies combined with multiple machine learning methods, including...
With the emergence and development of artificially structured electromagnetic materials, active terahertz (THz) metamaterial devices have attracted significant attention in recent years. Tunability transmission is desirable for many applications. For example, short-range wireless THz communications ultrafast interconnects require switches modulators. However, tunable range amplitude existing not satisfactory. In this article, we experimentally demonstrate an electrically superconducting...
Generating multiple local oscillator (LO) beams by beam splitters is a crucial aspect of large heterodyne array receivers operating at terahertz (THz) frequencies, with over 100 pixels. Metasurfaces have received considerable attention due to their unique and flexible wavefront modulation capabilities. Nevertheless, the design beam-splitting metasurfaces faces significant challenges in increasing number diffraction beams, improving power efficiency, achieving greater homogeneity. A...
With the rapid development of terahertz-enabled devices, study miniaturized and integrated systems has attracted significant attention. We experimentally demonstrate an imaging-based pixelated metamaterial for detecting terahertz molecular fingerprints related to intermolecular vibrations large-amplitude intramolecular modes, including chemical identification compositional analysis. The compact THz sensor consists a 4 × filter-detector array with transmission resonances tuned discrete...
经验模态分解一类的递归算法所产生的模态混淆和端点效应将导致所获物理信息失真, 变分模态分解可改善这些问题. 但因其需预设参数, 对信号分解精度影响显著, 为此, 提出采用目标信号功率谱峰值所对应的频率以初始化变分模态分解所需中心频率, 借鉴经验模态分解递归模型, 基于能量截止法将变分模态分解改进为递归模式算法, 并采用粒子群优化算法对具有带宽约束能力的惩罚因子进行最优取值, 构成优化递归变分模态分解. 通过对比分析经验模态分解, 集成经验模态分解及优化递归变分模态分解在分解信号时的计算精度; 研究传统变分模态分解与优化递归变分模态分解在处理实际振动信号时计算速率. 结果表明: 优化递归变分模态分解在处理目标信号时精度最高, 与原分量相关性达99.9%; 与集成经验模态分解对比, 可由低至高将信号分解至不同频段, 物理意义更加清晰且不产生虚假模态; 处理实际非线性信号时, 优化递归变分模态分解无需预设分解模态个数, 相比于传统变分模态分解, 计算速率高12.5%—18.5%.
We present an electrically tunable superconducting metamaterial capable of modulating terahertz (THz) waves. The device consists two concentric ring resonators, which exhibits the electromagnetically induced transparency-like spectral response. A relatively high modulation depth 86.8% and a group delay 25.4 ps were achieved at transmission window. experimental simulated spectra show good agreement. hybrid coupling model could well explain physical mechanism. tuning THz waves is great...
As an important ecosystem on the earth, forests not only provide habitat and food for organisms but also play role in regulating environmental elements such as water, atmosphere, soil. The quality of forest waters directly affects health stability aquatic ecosystems. Chemical oxygen demand (COD) is commonly used to assess concentration organic matter pollution status water bodies, which helpful assessing impact human activities To effectively measure COD value, samples were prepared from...
This study presents an analysis of the quasi-16-day wave (Q16DW) at three stations in middle latitudes by using a meteor radar chain conjunction with Aura Microwave Limb Sounder temperature data and MERRA2 (Modern-Era Retrospective Analysis for Research Applications, Version 2) reanalysis from 2008 to 2017. The consists located Mohe (MH, 53.5°N, 122.3°E), Beijing (BJ, 40.3°N, 116.2°E), Wuhan (WH, 30.5°N, 114.6°E). Q16DW exhibits similar seasonal variation neutral wind temperature, amplitude...
Abstract Free‐standing poly( para ‐phenylene) (PPP) films have been electrosynthesized by direct oxidation of benzene on stainless steel electrode in mixed e1ectrolytes boron trifluoride diethy1 etherate (BFEE) and trifluoroacetic acid (TFA). The potential the monomer these media is lower than those neutral media. Increasing content TFA electrolyte can effective1y decrease increase coup1ing rate monomer. obtained from were very shiny flexible, could easily be processed into various shapes...
Open AccessCCS ChemistryRESEARCH ARTICLE1 Sep 2021Manipulation of Molecular Qubits by Isotope Effect on Spin Dynamics Jing Li, Shi-Jie Xiong, Chun Biaobing Jin, Yi-Quan Zhang, Shang-Da Jiang, Zhong-Wen Ouyang, Zhenxing Wang, Xing-Long Wu, Johan van Tol and You Song Li State Key Laboratory Coordination Chemistry, School Chemistry Chemical Engineering, Nanjing University, 210023 , Xiong National Solid Microstructures, Department Physics, 210093 Research Institute Superconductor Electronics...
In this work, we experimentally demonstrate an electrically tunable superconducting composite structure metamaterial capable of modulating terahertz (THz) waves. Compared with other switching devices, our device is composed golden structures and niobium nitride (NbN) film junctions together. Its unique structural characteristics allow to achieve relatively large amplitude modulation effects the smallest films. With a 4 V bias voltage, depth 73.8% for switch can be achieved at 0.308 THz. The...
We experimentally present a tunable electromagnetically induced transparency (EIT)-like response in bright-bright mode resonators. In contrast to previous studies, we used NbN film and gold composite structure metamaterial. A significant slow-light effect could be observed at the transmission window, maximum group index reach 100. As variation temperature alters intrinsic ohmic loss of superconducting film, temperature-dependent transmittance were observed. To better illustrate physical...