A5075622995- Terahertz technology and applications
- Metamaterials and Metasurfaces Applications
- Superconducting and THz Device Technology
- Physics of Superconductivity and Magnetism
- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Millimeter-Wave Propagation and Modeling
- Advanced Antenna and Metasurface Technologies
- Spectroscopy and Laser Applications
- Antenna Design and Analysis
- Ferroelectric and Piezoelectric Materials
- Magnetic properties of thin films
- Microwave Dielectric Ceramics Synthesis
- Microwave Engineering and Waveguides
- Quantum and electron transport phenomena
- Acoustic Wave Resonator Technologies
- Photonic Crystals and Applications
- Topological Materials and Phenomena
- Orbital Angular Momentum in Optics
- Quantum Information and Cryptography
- Mechanical and Optical Resonators
- Multiferroics and related materials
- Advanced Fiber Laser Technologies
- Semiconductor Quantum Structures and Devices
- Advanced Optical Sensing Technologies
Purple Mountain Laboratories
2022-2025
Nanjing University
2016-2025
Beihang University
2023-2025
Shandong University
2025
Suzhou Research Institute
2025
QuantumCTek (China)
2025
Jinzhou Medical University
2024
Anhui University of Science and Technology
2022
Zaozhuang University
2022
University of Electronic Science and Technology of China
2015-2021
The terahertz region is a special of the electromagnetic spectrum that incorporates advantages both microwaves and infrared light waves. In past decade, metamaterials with effective medium parameters or gradient phases have been studied to control waves realize functional devices. Here, we present new approach manipulate by using coding metasurfaces are composed digital elements. We propose general unit based on Minkowski closed-loop particle capable generating 1-bit (with two phase states 0...
Bi<sub>2</sub>(Li<sub>0.5</sub>Ta<sub>1.5</sub>)O<sub>7</sub> ceramics possess a <italic>ε</italic><sub>r</sub> of 65.1, <italic>Q</italic><sub>f</sub> 15 500 GHz and TCF −17.5 ppm °C<sup>−1</sup>. The sintering temperature was lowered to 920 °C by the addition 2 mol% Bi<sub>2</sub>O<sub>3</sub>, which makes them potential candidates for dielectric resonators LTCC applications.
The coding metasurface integrated with tunable materials offers an attractive alternative to manipulate the THz beam dynamically. In this work, we demonstrate a programmable based on liquid crystal. phase profile could be dynamically manipulated by switching “0” and “1” states of each element. deflect using designed sequence, maximum deflection angle 32° has been achieved. presented design opens route beamforming for communication.
Arbitrary control of terahertz (THz) waves remains a significant challenge although it promises many important applications. Here, method to tailor the reflection and scattering THz in an anomalous manner by using 1‐bit coding metamaterials is presented. Specific sequences result various far‐field patterns, ranging from single beam two, three, numerous beams, which depart obviously ordinary Snell's law reflection. By optimizing sequences, wideband thin film metamaterial with extremely low...
Spatial light modulators (SLM), capable of dynamically and spatially manipulating electromagnetic waves, have reshaped modern life in projection display remote sensing. The progress SLM will expedite next-generation communication biomedical imaging the terahertz (THz) range. However, most current THz SLMs are adapted from optical alternatives that still need improvement terms uniformity, speed, bandwidth. Here, we designed, fabricated, characterized an 8 × based on tunable liquid crystal...
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...
Dynamic manipulation of electromagnetic (EM) waves with multiple degrees freedom plays an essential role in enhancing information processing. Currently, enormous challenge is to realize directional terahertz (THz) holography. Recently, it was demonstrated that Janus metasurfaces could produce distinct responses EM from two opposite incident directions, making multiplexed dynamic THz possible. Herein, we show thermally activated integrating phase change materials on the meta-atoms can...
This article describes the active control of terahertz waves using hybrid metamaterials containing embedded vanadium dioxide. VO${}_{2}$ undergoes an insulator-metal phase transition at around 68 \ifmmode^\circ\else\textdegree\fi{}C, causing its conductivity to change by about 5 orders magnitude, which yields mode switching in metamaterial. switching, is analogous resonant seen plasmonics, can be realized experimentally thermal, electrical, or optical stimuli. Such a diverse range stimuli...
We develop a fluorinated phenyl-tolane based nematic mixture NJU-LDn-4 and evaluate its frequency-dependent birefringence utilizing terahertz time domain spectroscopy (THz-TDS). A large mean of 0.306 is obtained in broad range from 0.4 to 1.6 THz, with maximum 0.314 at THz. Furthermore, relation between molecular structures property discussed. This work reveals new insights for tailing liquid crystal molecules desirable THz range, which extremely meaningful the design fabrication fast,...
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...
An active vanadium dioxide integrated metasurface offering broadband transmitted terahertz wave modulation with large modulation-depth under electrical control is demonstrated. The device consists of metal bias-lines arranged grid-structure patterned (VO2) film on sapphire substrate. Amplitude transmission continuously tuned from more than 78% to 28% or lower in the frequency range 0.3 THz 1.0 THz, by means bias at temperature 68 °C. physical mechanism underlying device's tunability...
Abstract Chiral media exhibit optical activity, which manifests itself as differential retardation and attenuation of circularly polarized electromagnetic waves opposite handedness. This effect can be described by different refractive indices for left‐ right‐handed yields a negative index in extreme cases. Here, active control chirality, is demonstrated. These phenomena are observed terahertz metamaterial based on 3D‐chiral metallic resonators achiral vanadium dioxide inclusions. The chiral...
A temperature-stable Sm(Nb<sub>0.8</sub>V<sub>0.2</sub>)O<sub>4</sub>(SNV-0.2) microwave dielectric ceramic with ultra-low loss was fabricated, and an RDRA designed for 5G mm-wave application the first time, which is a good candidate future millimeter-wave MIMO antenna applications.
While the technology of microwave and infrared sources is quite mature has been widely used in our daily life for decades, that can work well across terahertz (THz) range are still lagging behind, which often referred to as “THz gap.” As one most pioneering THz setups, time-domain spectroscopy a vital tool explore properties materials their underlying physics. The mechanism use an ultrafast pump pulse exciting rapidly decaying currents inside either nonlinear or photoconducting medium, known...
Abstract Spatial light modulators (SLMs) exhibit a powerful capability of controlling electromagnetic waves. They are found to have numerous applications at terahertz (THz) frequencies, including wireless communication, digital holography, and compressive imaging. However, the development toward large‐scale, multi‐level, multi‐functional THz SLM encounters technical challenges. Here, an electrically programmable metamaterial consisting array 8×8 pixels is presented, in which phase change...
Electrically controlled terahertz (THz) beamforming antennas are essential for various applications such as wireless communications, security checks, and radar to improve coverage information capacity. The emerging programmable metasurface provides a flexible, cost-effective platform THz beam steering. However, scaling arrays achieve high-gain steering faces several technical challenges. Here, we propose pixelated liquid crystal with crossbar structure, thereby increasing the array scale...
In developing low-temperature cofired ceramic (LTCC) technology for high-density packaging or advanced packaged electronics, matching the coefficient of thermal expansion (CTE) among components is a critical challenge to improve reliability. The CTEs solders and organic laminates are usually larger than 16.0 ppm °C1-, while most low-permittivity (εr) dielectric ceramics have less 10.0 °C1-. Therefore, good CTE match between required further LTCC applications. this paper, we propose high-CTE...
Recently, the growing interest in reconfigurable intelligent surface (RIS) technology has spurred extensive research on its utilization terahertz (THz) regime. The reconfiguration of THz field empowered by RIS holds great significance for various practical RIS-aided implementations at frequencies. In this study, we present a multi-bit liquid crystal-based that allows programmable control waves. proposed is characterized an achievable 3-bit working state as well near 270° maximum phase shift...
Abstract Nonlinear transport enabled by symmetry breaking in quantum materials has aroused considerable interest condensed matter physics and interdisciplinary electronics. However, achieving a nonlinear optical response centrosymmetric Dirac semimetals via defect engineering remained challenge. Here, we observe the helicity dependent terahertz emission semimetal PtTe 2 thin films circular photogalvanic effect under normal incidence. This is activated controllable out-of-plane Te-vacancy...
Abstract Emerging reconfigurable metasurfaces offer various possibilities for programmatically manipulating electromagnetic waves across spatial, spectral, and temporal domains, showcasing great potential enhancing terahertz applications. However, they are hindered by limited tunability, particularly evident in relatively small phase tuning over 270°, due to the design constraints with time‐intensive forward methodologies. Here, a multi‐bit programmable metasurface is demonstrated capable of...
Abstract Polarized vortex waves have attracted widespread attention in investigations of light–matter interactions and the augmentation information capacity owing to their distinctive characteristics. Nevertheless, reconfigurable generation vector beams, especially at terahertz (THz) frequencies, remains challenging. In this study, a tunable THz polarization beam generator based on liquid‐crystal metasurface is proposed. A unit cell featuring linear selectivity developed. general methodology...