A5022457098- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Plasmonic and Surface Plasmon Research
- Antenna Design and Analysis
- Acoustic Wave Phenomena Research
- Orbital Angular Momentum in Optics
- Photonic Crystals and Applications
- Quantum Mechanics and Non-Hermitian Physics
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Photonic and Optical Devices
- Microwave Engineering and Waveguides
- Advancements in Battery Materials
- Electromagnetic Scattering and Analysis
- Nonlinear Photonic Systems
- Topological Materials and Phenomena
- Optical Coatings and Gratings
- Atmospheric chemistry and aerosols
- Advanced Battery Materials and Technologies
- Terahertz technology and applications
- Advanced Semiconductor Detectors and Materials
- Aerodynamics and Acoustics in Jet Flows
- Thermal Radiation and Cooling Technologies
- Thin-Film Transistor Technologies
- Semiconductor Quantum Structures and Devices
Soochow University
2016-2025
Shenzhen Institutes of Advanced Technology
2022-2024
Chinese Academy of Sciences
2021-2024
Nanjing University of Science and Technology
2024
Qingdao University of Science and Technology
2024
Qingdao University of Technology
2024
Ministry of Education of the People's Republic of China
2022
Environmental Protection Agency
2018-2022
Shaanxi Normal University
2021
Shanghai Institute of Microsystem and Information Technology
2021
Abstract Phase gradient metagratings (PGMs) have provided unprecedented opportunities for wavefront manipulation. However, this approach suffers from fundamental limits on conversion efficiency; in some cases, higher order diffraction caused by the periodicity can be observed distinctly, while working mechanism still is not fully understood, especially refractive-type metagratings. Here we show, analytically and experimentally, a metagrating which enable anomalous reflection refraction with...
A simple core-shell two-dimensional photonic crystal is studied where the triangle lattice symmetry and $C_{6v}$ rotation leads to rich physics in study of accidental degeneracy's bands. We systematically evaluate different types nodal points, depending on dispersions around them their topological properties, when geometry permittivity are continuously changed. These points can be critical states lying between a phase normal thus important for states. In time-reversal systems, this quantum...
In this work, we investigate wave transmission through an epsilon-near-zero metamaterial waveguide embedded with defects. We show that by adjusting the geometric sizes and material properties of defects, total reflection, even can be obtained, despite impedance mismatch free space. Our work greatly simplify design zero-index applications removing dependence on permeability.
Artificial topological charge designed by azimuthal metagratings can be used to control sound vortex diffraction.
Inspired by electromagnetic waveguide cloaks with gradient index metamaterials, we fabricated a broadband cloak simply depth profile on the bottom and without any other structures top to confine water waves in certain area for cloaking regions. The new physics of mode conversion is first found. experimental numerical simulation results are good agreement show that presented device has nice performance various situations feasible over working frequencies. Being easy construct, this design...
In this Letter, we introduce a new paradigm for achieving robust asymmetric generation of acoustic vortex field through dual-layer metasurfaces by controlling their intrinsic topologic charges and the parity geometry design. The underlying physics is contributed to one-way process orbital angular momentum (OAM) transition ensured broken spatial symmetry external charge from diffraction. We further experimentally demonstrate novel phenomenon. Our findings could provide routes manipulate...
Terahertz (THz) molecular fingerprint sensing provides a powerful label-free tool for the detection of trace-amount samples. Due to weak light–matter interaction, various metallic or dielectric metasurfaces have been adopted enhance absorbance signals. However, they suffer from strong background damping complicated sample coating on patterned surfaces. Here, we propose an inverted metagrating and broadband THz trace analytes planar surface. Enhancement signal originates effects evanescent...
Surface functionalization is an effective strategy to reduce the chemical reactivity between a Li1.3Al0.3Ti1.7(PO4)3 (LATP) electrolyte and Li metal anode optimize interfacial contact of different components. Herein, sodium itaconate (SI) introduced modify surfaces LATP particles (LATP@SI) via self-polymerizing process, composite solid (CSE) composed poly(ethylene oxide) (PEO) LATP@SI fabricated. Benefiting from protection SI nanolayer, demonstrates compatibility with anode, while reduced...
Semi-Dirac cones, characterized by linear-parabolic dispersions, endow photonic crystals with many fascinating properties, such as topological transitions and anisotropic electromagnetic responses. While most preceding investigations concentrated on two-dimensional systems, our exploration of three-dimensional comprising a cubic lattice core-shell spheroids unveils unusual dispersions in systems---dual semi-Dirac cones. The dual cones arising from pair coexisting triply degenerate modes can...
Abstract Light reflection and refraction at an interface between two homogeneous media is analytically described by Snell's law. For a beam with finite waist, it turns out that the reflected wave experiences lateral displacement from its position predicted geometric optics. Such Goos-Hänchen (G-H) effect has been extensively investigated among all kinds of optical media, such as dielectrics, metals, photonic crystals metamaterials. As fundamental physics phenomenon, G-H extended to acoustics...
Inspired by the concept of parity-time symmetry, we propose a new waveguide system consisting zero index metamaterials with an air gap. Based on analytical calculations and numerical simulations, demonstrate that there are two exceptional points in such system, which can induce unidirectional transparency. However, introduced gap could effectively manipulate property PT symmetry. In particular, coherent perfect absorber-laser modes be excited broken phase, if specific phase difference is...
Abstract The Luneburg lens is a spherically symmetrical gradient refractive index (GRIN) device with unique imaging properties. Its wide field-of-view (FoV) and minimal aberration have lead it to be successfully applied in microwave antennas. However, only limited realizations been demonstrated acoustics. Previously proposed acoustic lenses are mostly inherently two-dimensional designs at frequencies from 1 kHz 7 kHz. In this paper, we apply new design method for scalable self-supporting...
In this work, we propose and demonstrate a simple acoustic metagrating with binary phase modulation that can be employed to achieve multifunctional reflection high efficiency, including three-channel retroreflection, quasi-retroreflection, specular reflection. Although only two sub-elements are designed for the metagratings, efficiency of is well preserved. By changing desired retroreflection angle, incident range quasi-retroreflection effectively tuned. Our work provides an alternative way...
Abstract Branched flows occur ubiquitously in various wave systems, when the propagating waves encounter weak correlated scattering potentials. Here we report experimental realization of electrical tuning branched flow light using a nematic liquid crystal (NLC) system. We create physical weakly disordered potentials via inhomogeneous orientations NLC. demonstrate that can be switched on and off as well tuned continuously through electro-optical properties NLC film. further show manipulated...
Abstract Transformation optics has shown great ability in designing devices with novel functionalities, such as invisibility cloaking. A recent work shows that it can also be used to design metasurfaces which usually come from the concept of phase discontinuities. However, transformation have very complicated material parameters. Here this work, we propose a practical design, sub-wavelength metallic grating discrete and gradient index materials. Such not only inherits some functionalities...
Goos-Hänchen (GH) effect is a fundamental phenomenon in optics. Here we demonstrate theoretically that the surface modes at Parity-time (PT) symmetric interfaces, can induce giant GH shift specific incident angle. It found amplitude of be tuned by adjusting thickness bilayer, and as grows, its maximum value go to infinity theory. The physical mechanism behind this interesting feature PT interfaces are quasi-bound states continuum (BICs), which lead rapid variation phase scattered waves. Our...
Phase-gradient metasurfaces (PGMs) provide remarkable control over the propagation of light. One expects that number unit cells $m$ in a supercell should not change nature PGM's diffraction characteristics, yet recent experiments have indicated $m$-dependent asymmetric absorptivity. An analytical description relationship between absorptivity and is needed, but lacking. This study offers simple, intuitive semianalytical approach to explaining observed Here phase gradient ensures additional,...
Geometrical symmetry plays a significant role in implementing robust, symmetry-protected, bound states the continuum (BICs). However, this benefit is only theoretical many cases since fabricated samples' unavoidable imperfections may easily break stringent geometrical requirements. Here we propose an approach by introducing concept of geometrical-symmetry-free but symmetry-protected BICs, realized using static-like environment induced zero-index metamaterial (ZIM). We find that robust BICs...
Poly(ethylene oxide) (PEO) and Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 (LLZTO)‐based composite polymer electrolytes (CPEs) are considered one of the most promising solid electrolyte systems. However, agglomeration LLZTO within PEO lack + channels result in poor electrochemical properties. Herein, a functional supramolecular combination (CD‐TFSI) consisting active β‐cyclodextrin (CD) with self‐assembled LiTFSI salt is selected as an interface modifier to coat fillers. Benefiting from vast H‐bonds...
Optical phase gradient metasurfaces (PGMs) have provided unprecedented opportunities for arbitrarily controlling wave propagation via the generalized Snell's law (GSL). However, whole picture of diffraction therein has not been clearly presented, particularly incident angles beyond critical angle. Although a parity-dependent effect was found in acoustic metagratings, little is known about whether this holds true typical optical PGMs. Here we demonstrate universality by employing some PGMs...