A5026397480- Acoustic Wave Phenomena Research
- Metamaterials and Metasurfaces Applications
- Topological Materials and Phenomena
- Aerodynamics and Acoustics in Jet Flows
- Ultrasonics and Acoustic Wave Propagation
- Underwater Acoustics Research
- Thermography and Photoacoustic Techniques
- Noise Effects and Management
- Quantum Mechanics and Non-Hermitian Physics
- Acoustic Wave Resonator Technologies
- Speech and Audio Processing
- Advanced Fiber Optic Sensors
- Nuclear Physics and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Condensed Matter Physics
- Graphene research and applications
- Nuclear reactor physics and engineering
- Thermoelastic and Magnetoelastic Phenomena
- Advanced Photonic Communication Systems
- Laser Material Processing Techniques
- Quantum Information and Cryptography
- Quantum many-body systems
- Hearing Loss and Rehabilitation
- Quantum Computing Algorithms and Architecture
Chinese Academy of Sciences
2016-2025
Institute of Acoustics
2016-2025
Jiangsu University
2016-2025
Nanjing University
2012-2025
Collaborative Innovation Center of Advanced Microstructures
2015-2025
City University of Macau
2025
State Key Laboratory of Acoustics
2025
Institute of Modern Physics
2022-2024
Nantong University
2016
Institute of High Energy Physics
2015
The recently discovered non-Hermitian skin effect (NHSE) manifests the breakdown of current classification topological phases in energy-nonconservative systems, and necessitates introduction band topology. So far, all NHSE observations are based on one type topology, which complex energy spectrum winds along a closed loop. As characterized synthetic dimension photonic platform, topology can exhibit almost arbitrary windings momentum space, but their actual phenomena real physical systems...
Topological acoustics has recently revolutionized fundamental concepts of acoustic propagation, giving rise to strikingly unique edge modes immune backscattering. Despite the rapid progress in this field, simultaneous realization reconfigurability, intelligentization, and automatic control over propagation paths is posing a great challenge. This challenge overcome by proposing concept programmable topological insulator based on two digital elements "0" or "1," which consist honeycomb-lattice...
The acoustic asymmetric focusing effect attracts more and attention, with its extensive applications in high-intensity focused ultrasound (HIFU) therapy medical imaging. Typical devices have symmetric structures, though, which do not yield transmission simultaneously. This work realizes a broadband lens using dual-layer metasurfaces for both subwavelength transmission. Without changing the metasurface's horizontal vertical are manipulated by mechanically distance between metasurfaces, angle...
Recent studies have revealed the counterintuitive possibility that increasing disorder can turn a topologically trivial insulator into nontrivial insulator, called topological Anderson (TAI). Here, we propose and experimentally demonstrate photonic TAI in two-dimensional disordered gyromagnetic crystal microwave regime. We directly observe disorder-induced phase transition from to with robust chiral edge states. also heterostructures host states at interfaces between domains different parameters.
Abstract Berry phase associated with energy bands in crystals can lead to quantised observables like dipole polarizations one-dimensional topological insulators. Recent theories have generalised the concept of dipoles multipoles, resulting discovery multipole insulators which exhibit a hierarchy topology: octupole moment three-dimensional bulk induces quadrupole moments on its two-dimensional surfaces, turn induce hinges. Here, we report realisation an insulator acoustic metamaterial. We...
For the classification of topological phases matter, an important consideration is whether a system spinless or spinful, as these two classes have distinct symmetry algebra that gives rise to fundamentally different phases. However, only recently has it been realized theoretically in presence gauge symmetry, algebraic structure symmetries can be projectively represented, which possibly enables switch between and spinful Here, we report experimental demonstration this idea by realizing...
Abstract When electrons moving in two dimensions (2D) are subjected to a strong uniform magnetic field, they form flat bands called Landau levels (LLs). LLs can also arise from pseudomagnetic fields (PMFs) induced by lattice distortions. In three-dimensional (3D) systems, there has been no experimental demonstration of as type band thus far. Here, we report the realization 3D LL an acoustic crystal. Starting whose bandstructure exhibits nodal ring, design inhomogeneous distortion...
A model of acoustic diodes is realized by a thin brass plate with single-sided periodical grating structure immersed in water and studied both numerically experimentally. The unidirectional transmission waves identified two different frequency ranges, which can be systematically controlled adjusting the sizes structural units. results indicate that have advantages tunable range, broader bandwidth, simple as well being easy to achieved. remarkable effect has great potential applications...
Three-dimensional (3D) gapless topological phases can be classified by the dimensionality of band degeneracies, including zero-dimensional (0D) nodal points, one-dimensional (1D) lines, and two-dimensional (2D) surfaces. Both points lines have been realized recently in photonics acoustics. However, a surface has never observed any classical-wave system. Here, we report on experimental observation twofold symmetry-enforced 3D chiral acoustic crystal. In particular, demonstrated carries charge...
We report both experimentally and numerically that a flow-free pseudospin-dependent acoustic topological insulator (ATI) is realized by two honeycomb sonic crystals with direct indirect band gaps. By simply rotating triangular rods of the crystals, inversion realized, which arises from change coupling strength between leads to phase transition. Moreover, gap converted into an when rotation angle larger than 32.18°. using angles 0°, 30°, 60°, we design insulators include nontrivial crystal...
The interplay between real-space topological lattice defects and the reciprocal-space topology of energy bands can give rise to novel phenomena, such as one-dimensional modes bound screw dislocations in three-dimensional insulators. We obtain direct experimental observations dislocation-induced helical an acoustic analog a weak insulator. spatial distribution is found through spin-resolved field mapping, verified numerically by tight-binding finite-element calculations. These channels serve...
Dirac cones (DCs) play a pivotal role in various unique phenomena ranging from massless electrons graphene to robust surface states topological insulators (TIs). Recent studies have theoretically revealed full hierarchy comprising an eightfold bulk DC, fourfold and twofold hinge associated with of phases including first-order third-order three-dimensional (3D) insulators, using the same 3D base lattice. Here, we report first experimental observation acoustic TIs. Using measurements,...
We report the theoretical and experimental realization of an open window structure which exhibits unusual properties broadband unidirectional omnidirectional bidirectional acoustic insulation. The is constructed by separate blades attached with metasurfaces ultrathin hooklike meta-atoms can change lateral momentum waves. Such a manipulation leads to blind region enables transmission. By improving phase distribution metasurfaces, fractional bandwidth reach about 0.36. Interestingly,...
We theoretically propose and experimentally realize two types of open window structures that exhibit an unusual functionality switchable omnidirectional acoustic insulation in different ways. Both consist array blades are attached with ultrathin metasurfaces on both sides. Based the manipulation ability metasurfaces, can be realized windows. Interestingly, such effect is by simply changing configuration blade array. For first type, switched or off adjusting distance between adjacent blades....
Valley pseudospins, as quantum states of energy extrema in momentum space, have been introduced from condensed-matter systems into classical sound systems, and several valley sonic crystals (VSCs) realized experimentally. However, the existing VSCs, topological kink generally appear a single band gap, which apparently has become an obstacle for multiband devices. To overcome this challenge, we here experimentally demonstrate dual-band robust exist two separated bulk gaps. More interestingly,...
Abstract Roton dispersion relations were firstly predicted by Landau and have been extensively explored in correlated quantum systems at low temperatures. Recently, the roton-like theoretically extended to classical acoustics, which, however, remained elusive reality. Here, we report experimental observation of dispersions acoustic metamaterials with beyond-nearest-neighbour interactions ambient The resulting metamaterial supports multiple coexisting modes different wavevectors group...
We report an exotic acoustic focusing effect through a simple brass circular ring structure immersed in water. The waves can be focused on prefect point at the centre of structure. This phenomenon arises from intrinsic modes some special eigenfrequencies, which is essentially distinct previous studies originating negative refraction. closely related to size and shape Interesting applications mechanism black box detectors sea medical ultrasound treatment are further discussed.
Acoustic metamaterials and metasurfaces provide great flexibility for manipulating sound waves promise unprecedented functionality, ranging from transformation acoustics, acoustic cloaking, imaging to rerouting. However, the design of artificial structures with both broad bandwidth multifunctionality remains challenging traditional approaches. Here we present a realization broadband metafiber bundle. Very different previously reported metasurfaces, not only structure is simple, flexible...
Topological acoustic interface states in one-dimensional (1D) topological insulators (ATIs) are zero-dimensional (0D) localized at an interface. Unlike edge that can propagate to deliver information waveguides, the 0D generally cannot serve as carriers from one location another due their intrinsic localization. Here, we design and demonstrate a 1D ATI with movable interface, enabling another. The is based on two types of elemental building blocks—denoted “1” “0”—which programmable. These...
Metasurface holograms represent a common category of metasurface devices that utilize in-plane phase gradients to shape wavefronts, forming holographic images through the application generalized Snell's law (GSL). While conventional metasurfaces focus solely on gradients, metagratings, which incorporate higher-order wave diffraction, further expand GSL's generality. Recent advances in certain acoustic metagratings demonstrate an updated GSL extension capable reversing anomalous transmission...
Negative refraction is a counterintuitive wave phenomenon that has inspired the development of metamaterials and metasurfaces with negative refractive indices surface phase discontinuities, respectively. Recent theories have proposed an alternative mechanism for refraction: Synthetic gauge fields, induced by either dynamical modulation or motion, can shift material’s dispersion in momentum space, forcing positive index medium to exhibit above certain threshold. However, this not previously...
Abstract It is reported both experimentally and numerically that dual‐band acoustic Fano resonances (AFRs) of low‐frequency sound are realized by a compound unit array composed two types multiple‐cavity cells with different inner radii. Eigenmode analyses show monopolar Mie resonance (MMR) modes can be observed below 650 Hz, which arise from the coupling overall structure Helmholtz each cavity, respectively. Based on MMRs out‐of‐phase characteristic induced mutual cells, AFRs, in quality...