A5100435121- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Topological Materials and Phenomena
- Quantum Mechanics and Non-Hermitian Physics
- Electromagnetic wave absorption materials
- COVID-19 and Mental Health
- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Millimeter-Wave Propagation and Modeling
- Magnetic Properties and Applications
- Orbital Angular Momentum in Optics
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Plasmonic and Surface Plasmon Research
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced battery technologies research
- Non-Destructive Testing Techniques
- Heusler alloys: electronic and magnetic properties
- Reconstructive Surgery and Microvascular Techniques
- Radio Wave Propagation Studies
- Mental Health Research Topics
- Conducting polymers and applications
- Quantum optics and atomic interactions
- Facial Trauma and Fracture Management
Liaoning University
2021-2025
Southeast University
2025
Zhejiang University
2024
State Key Laboratory of Millimeter Waves
2015-2024
Southeast University
2015-2024
China Academy of Space Technology
2019-2024
Beijing Chest Hospital
2021-2023
Capital Medical University
2021-2023
Wuhan University
2014-2023
Aerospace Information Research Institute
2023
Metasurfaces have enabled a plethora of emerging functions within an ultrathin dimension, paving way towards flat and highly integrated photonic devices. Despite the rapid progress in this area, simultaneous realization reconfigurability, high efficiency, full control over phase amplitude scattered light is posing great challenge. Here, we try to tackle challenge by introducing concept reprogrammable hologram based on 1-bit coding metasurfaces. The state each unit cell metasurface can be...
Abstract The recently proposed digital coding metasurfaces make it possible to control electromagnetic (EM) waves in real time, and allow the implementation of many different functionalities a programmable way. However, current configurations are only space-encoded, do not exploit temporal dimension. Here, we propose general theory space-time modulated obtain simultaneous manipulations EM both space frequency domains, i.e., propagation direction harmonic power distribution simultaneously. As...
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...
Metamaterials based on effective media can be used to produce a number of unusual physical properties (for example, negative refraction and invisibility cloaking) because they tailored with medium parameters that do not occur in nature. Recently, the use coding metamaterials has been suggested for control electromagnetic waves through design sequences using digital elements '0' '1,' which possess opposite phase responses. Here we propose concept an anisotropic metamaterial behaviors...
Optical non-linear phenomena are typically observed in natural materials interacting with light at high intensities, and they benefit a diverse range of applications from communication to sensing. However, controlling harmonic conversion efficiency flexibility remains major issue modern optical radio-frequency systems. Here, we introduce dynamic time-domain digital-coding metasurface that enables efficient manipulation spectral distribution. By dynamically modulating the local phase surface...
The concept of coding metasurface makes a link between physically metamaterial particles and digital codes, hence it is possible to perform signal processing on the realize unusual physical phenomena. Here, this study presents Fourier operations metasurfaces proposes principle called as scattering‐pattern shift using convolution theorem, which allows steering scattering pattern an arbitrarily predesigned direction. Owing constant reflection amplitude particles, required can be simply...
Digital coding representation of metamaterials and metasurfaces allows information signal processing operations to be performed directly on physical spaces.
We present the simulation, implementation, and measurement of a broadband terahertz (THz) metamaterial absorber. By stacking 12 metallic bars varying lengths on three polyimide layers with equal spacing, absorption spectrum is formed through merging multiple successive resonance peaks. The measured total exceeds 95% from 0.81 to 1.32 THz at normal incidence full width half maximum 64% (from 0.76 1.48 THz). decreases fluctuations as incident angle increases but remains above 62% even 40°....
Because of their exceptional capability to tailor the effective medium parameters, metamaterials have been widely used control electromagnetic waves, which has led observation many interesting phenomena, for example, negative refraction, invisibility cloaking, and anomalous reflections transmissions. However, studies or metasurfaces are mainly limited physical features; currently, there is a lack viewpoints on from information perspective. Here we propose measure coding metasurface using...
We propose to design coding metasurfaces based on the Pancharatnam-Berry (PB) phase. The proposed PB metasurface could control circularly polarized components of incident waves, by encoding geometric phase into orientation angle particles generate 1-bit and multibit responses. perform digital convolution operations scattering patterns reach flexible controls forming spin-controlled multiple beams with different polarizations in free space, such as pencil vortex carrying orbital angular...
Coding metasurfaces, composed of an array coding particles with discrete phase responses, are encoded predesigned sequences to manipulate wavefronts electromagnetic (EM) waves and realize novel functionalities such as anomalous beam deflection, broadband diffusion, polarization conversion. Such a new concept can be viewed bridge linking metamaterial digital codes, yielding the investigation metamaterials from perspective eventually realization real-time control EM waves. Here, we propose...
Abstract Coding representation of metamaterials builds up a bridge between the physical world and digital world, making it possible to manipulate electromagnetic (EM) waves by coding sequences reach field‐programmable metamaterials. Here, space is extended complex domain proposed codes provide closer essence EM‐wave propagation. Based on analytic geometry variable functions, an addition theorem established, which reveals inherent connections among with different bits enables all higher‐bit...
The conventional bulk-boundary correspondence directly connects the number of topological edge states in a finite system with invariant bulk band structure periodic boundary condition (PBC). However, recent studies show that this principle fails certain non-Hermitian systems broken reciprocity, which stems from skin effect (NHSE) where most eigenstates decay exponentially boundary. In work, we experimentally demonstrate 1D circuit reciprocity by utilizing unidirectional coupling feature...
Reconfigurable intelligent surfaces (RISs) offer an entirely new route to alter the propagation properties of electromagnetic waves and thus control their reflection, refraction, scattering features in arbitrary manners. Such physical attributes are perceived bring about fundamental influence on modern wireless communication system due possibilities establish artificial controllable environments for radio signals, which no longer rely complex encoding, decoding, other signal processing...
properties of the optical surface plasmons in microwave and terahertz frequencies using subwavelength artificial structures to construct negative permittivity.The spoof also benefit from realization ultrathin corrugated metallic strips [14], as they are compatible with printed circuit boards (PCBs) integrated technologies.Since propagating localized were experimentally realized PCBs 2013 2014 [14, 15], this area flourishes prospective applications emerging circuits, sensing, wireless...
Abstract As a digital version of metamaterials, coding and programmable metamaterials have experienced rapid development since they were initially proposed in 2014. Unlike conventional that are characterized by the sophisticated effective medium theory, described much simpler manner with binary codes, which builds up bridge between physical world world. In this article, past three years is reviewed, focusing primarily on basic concept, working principle, design method, fabrication,...
We present a novel method to design conventional Fabry–Perot (F-P) antenna but with low scattering. Combining coding metasurface and an F-P together could effectively reduce the scattering keep high gain simultaneously. The element consists of two layers square metallic patches printed on both sides dielectric substrate. bottom patch helps form partially reflecting surface (PRS) for antenna, while upper is utilized construct optimized sequence, aiming by redirecting electromagnetic energies...
Coding metasurfaces, based on the combination of two basic unit cells with out‐of‐phase responses, have been subject many recent studies aimed at achieving diffuse scattering, potential applications to diverse fields ranging from radar‐signature control computational imaging. Here, via a theoretical study relevant scaling‐laws, physical mechanism underlying scattering‐signature reduction is elucidated, and some absolute realistic bounds are analytically derived. Moreover, simple,...
In modern wireless communications, digital information is firstly converted to analog signal by a digital-analog convertor, which then mixed high-frequency microwave be transmitted through series of devices including modulator, mixer, amplifier, filter, and antenna finally received terminals via reversed process. Although the communication systems have evolved significantly over past thirty years, basic architecture has not been challenged. Here, we propose method transmit directly...
A frequency-dependent dual-functional coding metasurface is proposed at terahertz frequencies using two layers of metamaterial structures, each which responsible for the independent control reflection phases distinct frequencies. The zero interference between functionalities lower and higher are promising possible applications in multicolor holography color displays or a frequency beam splitter. As service to our authors readers, this journal provides supporting information supplied by...
Systematic manipulation of nanocrystal shapes is prerequisite for revealing their shape-dependent physical and chemical properties. Here we successfully prepared a complex shape Pt micro/nanocrystals: convex hexoctahedron (HOH) enclosed with 48 {15 5 3} high-index facets by electrochemical square-wave-potential (SWP) method. This the last crystal single form that had not been achieved previously face-centered-cubic (fcc) metals. We further realized evolution nanocrystals from tetrahexahedron...