A5014897391- Metamaterials and Metasurfaces Applications
- Acoustic Wave Phenomena Research
- Orbital Angular Momentum in Optics
- Microfluidic and Bio-sensing Technologies
- Antenna Design and Analysis
- Aerodynamics and Acoustics in Jet Flows
- Advanced Antenna and Metasurface Technologies
- Ultrasonics and Acoustic Wave Propagation
- Underwater Acoustics Research
- Fluid Dynamics and Heat Transfer
- Strong Light-Matter Interactions
- Energy Harvesting in Wireless Networks
- Gold and Silver Nanoparticles Synthesis and Applications
- Microfluidic and Capillary Electrophoresis Applications
- Speech and Audio Processing
- Plasmonic and Surface Plasmon Research
- Fluid Dynamics and Turbulent Flows
- Seismic Waves and Analysis
Collaborative Innovation Center of Advanced Microstructures
2021-2025
Nanjing University
2018-2025
National University of Singapore
2025
Nanjing Normal University
2017-2021
Tongji University
2018
Institute of Acoustics
2018
Abstract Ultrasonic imaging is crucial in the fields of biomedical engineering for its deep penetration capabilities and non-ionizing nature. However, traditional techniques heavily rely on impedance differences within objects, resulting poor contrast when acoustically transparent targets. Here, we propose a compact spatial differentiator underwater isotropic edge-enhanced imaging, which enhances without need agents or external physical fields. This design incorporates an amplitude...
Flat bands have empowered novel phenomena such as robust canalization with strong localization, high-collimation and low-loss propagation. However, the spatial symmetry protection in photonic or acoustic lattices naturally forces flat to manifest pairs aligned at an inherently specific angle, resulting a fixed bidirectional canalization. Here, we report flat-band metasurface, allowing not only unidirectional all in-plane angles but also tunability band alignment. The twist, tilt, skew of...
Multiplexing technology with increased information capacity plays a crucial role in the realm of acoustic communication. Different quantities sound waves, including time, frequency, amplitude, phase, and orbital angular momentum (OAM), have been independently introduced as physical multiplexing approach to allow for enhanced communication densities. An metasurface is decorated carbon nanotube patches, which when electrically pumped set rotate, functions hybrid mode-frequency-division...
Artificial structure plates engraved with discrete Archimedean spiral slits have been well designed to achieve fractional acoustic vortices (FAVs). The phase and pressure field distributions of FAVs are investigated theoretically demonstrated numerically. It is found that the singularities relating integer parts topological charge (TC) result in dark spots upper half profile a low-intensity stripe lower profile, respectively. dynamic progress FAV also discussed detail as TC increases from 1...
An annulus acoustic metasurface (AAM) composed of composite labyrinthine structure (CLS) subunits has been well designed to generate fractional vortices (FAVs) in air. The FAVs with different topological charges (TCs) are realized by modulating the transmitted phase shifts through CLS subunits. evolution pressure field and distributions FAV is investigated numerically using finite element method demonstrated theoretically. As TC increases from 1 2, central singularity first splits into two...
The synergistic control of light's frequency and orbital angular momentum (OAM) via integrated nonlinear ring microresonators is crucial for creating spatiotemporal optical waveforms advancing metrology. A direct analog this capability in acoustics challenging due to the nonlinearity-based mechanisms' dependence on external driving limited conversion efficiency. Here, we present an acoustic synthesized comb structure derived from metasurfaces, concurrently controlling OAM characteristics...
Abstract High‐efficiency sound emission is crucial in practical scenarios, such as sonar system and acoustic communication. However, the efficient of low‐frequency source difficult because large radiation reactance from ambient medium. Here, a subwavelength bianisotropic hybrid Mie resonator (BHMR) proposed, which has shown excellent capability converting central monopole into enhanced dipole antennas at low frequency. The simulated field distributions far‐field radiations BHMR demonstrate...
A high-performance acoustic vortex beam generator (VBG) based on artificial micro-structured metamaterials is of great significance in communication. However, to date, the research metamaterial VBGs mainly focused their single frequency properties narrow band. Here, we propose a design strategy broadband constructed by gradient coupled-resonant meta-atoms, all which show near-unity transmission amplitudes, while covering 2π phase shifts linearly varied along with throughout desired...
Acoustic tweezers (ATs) have been extensively exploited in physics, biology, chemistry, and medical medicine. However, previous ATs are limited by complex designs cumbersome configurations, the stable manipulation of Mie particles remains challenging. Here, an AT based on acoustic focused petal beams (AFPBs) is proposed to realize 2D manipulations both Rayleigh water. The AFPBs generated artificial structure plates (ASPs) engraved with two kinds discrete curved slits. It found that bright...
Recently, considerable attention has been paid to acoustic vortices (AVs) due their increasing demands for practical applications. Conventional AV generators usually realize the with only one topological charge (TC), namely, carrying orbital angular momentum. In this work, we demonstrate that mixed focused (FAVs) two TCs can be achieved via an artificial structure plate engraved discrete rectangular holes (ASP-RHs). It is found performance of FAVs highly dependent on degeneracy ASP-RH. By...
Abstract An annulus acoustic metasurface (AAM) with multi‐layered rings is proposed to achieve the enhanced fractional vortices (FAVs). It found that enhancement of transmitted FAV through AAM sensitive radial interval between adjacent ring‐structures. A greatly theoretically obtained by optimized AAM. Then finite element models based on composite labyrinthine structures are established and generation confirmed simulations. Furthermore, samples fabricated experimentally generate topological...
Acoustic vortices (AVs) based on artificial metamaterials have attracted intense research efforts for their potential use in subdiffraction imaging, particle manipulation, and acoustic communication. However, to date, major strategies generate AVs an intrinsic limitation of fundamentally depending complex phase modulations, which require a higher number multiple elements as the desired topological charge increases, let alone elaborate dephasing between individual microstructured switching...
Thermoacoustic Metasurfaces In article number 2202026, Ying Cheng, Xiaojun Liu, Johan Christensen, and co-workers report an orbital-angular-momentum multiplexing technology based on space-time thermoacoustic metasurfaces for enhanced communication densities. analogy to the Chinese story “Monkey King Prays Rain”, multifaceted weather signals, i.e, lightning, thunder rain, etc., are synchronously transmitted through multipath beams.