A5101503027- Acoustic Wave Phenomena Research
- Mechanical and Optical Resonators
- Advanced Sensor and Energy Harvesting Materials
- Noise Effects and Management
- Hearing Loss and Rehabilitation
- Turbomachinery Performance and Optimization
- Conducting polymers and applications
- Nonlinear Optical Materials Studies
- Nonlinear Optical Materials Research
- Quantum Mechanics and Non-Hermitian Physics
- Quantum chaos and dynamical systems
- Porphyrin and Phthalocyanine Chemistry
- Topological Materials and Phenomena
- Dielectric materials and actuators
- Advanced Measurement and Detection Methods
- Quantum optics and atomic interactions
- Advanced MIMO Systems Optimization
- Aerodynamics and Acoustics in Jet Flows
- Infrared Target Detection Methodologies
- Heat Transfer Mechanisms
- Photonic and Optical Devices
- Connexins and lens biology
- Cellular and Composite Structures
- Thermal Radiation and Cooling Technologies
- Electrical and Bioimpedance Tomography
Hong Kong Baptist University
2022-2024
Xi'an Jiaotong University
2015-2024
Harbin University of Science and Technology
2024
China Academy of Space Technology
2021
Mongolian University of Science and Technology
2021
South China Agricultural University
2020
National University of Singapore
2019
Hebei GEO University
2012-2018
University of California, Merced
2017
Beijing University of Posts and Telecommunications
2016
Non-Hermitian physics has emerged as a new paradigm that profoundly changes our understanding of non-equilibrium systems, introducing novel concepts such exceptional points, spectral topology, and non-Hermitian skin effects (NHSEs). Most existing studies focus on eigenstates, whereas dynamic properties have been discussed only recently, the NHSEs are not yet confirmed in experiments. Here, we report experimental observation dynamics using tunable one-dimensional nonreciprocal double-chain...
Combining C larke's model with first‐principles calculation of average sound velocity, the minimum lattice thermal conductivities ( κ min ) Y 3 Al 5 O 12 YAG ), YAlO YAP and 4 2 9 YAM are predicted to be 1.59, 1.61, 1.10 W·(m·K) −1 , respectively. The weak – polyhedra provide “weak zones” that scattering phonons lead low ternary compounds. In addition, extremely is attributed its higher levels local disorder crystal structure weaker chemical bonding compared those . Inspired by theoretical...
Optomechanical quantum interfaces can be utilized to connect systems with distinctively different frequencies in hybrid networks. Here we present a scheme of nonreciprocal state conversion between microwave and optical photons via an optomechanical interface. By introducing auxiliary cavity manipulating the phase differences linearized couplings, uni-directional transmission achieved. The interface function as isolator, circulator, two-way switch that routes input states selected output...
Metamaterials/Phononic crystals are used to control the propagation of elastic waves/sound waves, and can be in fields such as vibration isolation, noise reduction, stealth, focusing, acoustic wave devices. The realization real-time, flexible active adjustable waves by mechanical reconstruction metamaterials is a current research hotspot. Here, SMP with self-recovery ability proposed. Affected glass transition temperature material, properties related geometric parameters lattice...
Abstract Cotton fiber is the most commonly used fabric in textiles and clothing. As compared to inorganic materials like foam, sponge paper, cotton fibers boast higher levels of flexibility toughness, which makes it more durable be better integrated with clothes. In this study, a conductive material modified by reduced graphene oxide (rGO) was prepared, applied pressure sensor. The highest sensitivity sensor constructed 0.21 kPa −1 , range covers up 500 kPa, demonstrates combination fine...
Flexible dielectrics with high energy density (Ue) and low loss (Ul) under elevated electric fields are especially attractive for the next-generation storage devices, e.g., high-pulse film capacitors. However, raising Ue by introducing dielectric constant materials generally increases Ul, which is detrimental to devices. To overcome this trade-off, a new strategy consisting of elevating electron polarization through incorporation 4-hydroxy-2,2,6,6-tetramethylpiperidin-N-oxy (TEMPO) units...
The spectrum of a non-Hermitian system generically forms two-dimensional complex Riemannian manifold with distinct topology from the underlying parameter space. This spectral permits eigenvalue trajectories to braid into knots. In this paper, through analyses encircling loops, exceptional points, and their topology, we uncover necessary considerations for constructing knots establish relation topology. Using an acoustic two periodic synthetic dimensions, experimentally realize several index...
The unique characteristics like periodic and locally resonant behaviors of acoustic metamaterials result in an anomalous response to the wave propagation exhibit complete elastic bandgaps. However, these unusual properties arise from geometry artificially designed metastructure can be significantly affected under exposure thermal environment. In this paper, we present a thermally tunable two-dimensional metamaterial with hexagonal lattice. numerical results demonstrated that by adjusting...
Polarized photons are, in essence, neutral particles and therefore do not couple directly to external fields, thus hampering the effective interaction of with fields. Here, we theoretically identify an equivalent spin-1/2 model for polarized synthesize a magnetization vector coupling differently engineered anisotropic medium. The synthetic magnetic field can be electrically manipulate moments pseudo-spin-1/2 photons, leading observation Lorentz force analogous Stern–Gerlach effect. We...
Abstract Polymer P(VDF‐TrFE) has been extensively applied in modern flexible electronics, such as nanogenerators and pressure sensors. In this study, a repolarization method is proposed to exploit the piezoelectric properties of electrospinning film modified by reduced graphene oxide (rGO). Then, repolarized composite self‐powered sensor. Notably, output voltage current are up 1.5 V 0.125 µA, respectively. Typically, three times high that pure spinning film. Meanwhile, also exhibits...
Dielectric polymers that exhibit high energy density Ue, low dielectric loss, and thermal resistance are ideal materials for next-generation electrical equipment. The most widely utilized approach to improving Ue involves augmenting the polarization through increasing constant εr or breakdown strength Eb. However, as a conflicting parameter, loss also increases inevitably at same time. In addition, due long-term work under strong electric field potential, often produce damage (electrical...
The generation of two-mode broadband squeezed light is investigated in cascading double-cavity optomechanical systems. cavities are driven by amplitude-modulated lasers with two frequency tones, one which red detuning and other blue from the cavity fields. It shown that a field can be generated single system via dissipation mechanical resonator. To generate strong squeezing fields, many identical systems connected together way. vacuum noise fed into thermal coupled to resonator greatly...
The aim of this research was to investigate the functions Piezo channels in dentin defect, including mechanical signalling and odontoblast responses.
A study on dynamical characteristics of a ternary locally resonant phononic crystal (PC) plate (i.e., hard scatterer with soft coating periodically disperse in stiff host matrix) is carried out this paper. The effect thermal deformation the structure stiffness, which plays an important role PC’s characteristics, considered. Results show that both start and stop frequency bandgap shift to higher range deformation. In particular, band change suddenly at critical buckling temperature. could be...
Tetraphenylporphyrin (TPP) and its nickel(II) (NiTPP) complex have been synthesized, their crystal structures determined by means of X-ray single diffraction. The TPP possesses good planarity in the porphyrin core, while disappeared. central ion coordinates with four nitrogen atoms, which constructed a distorted square environment. Their third-order nonlinear optical properties studied using Z-scan technique at wavelength 532 nm 1064 picosecond (ps) domain. At absorption were observed, shows...
Abstract The tradeoff between higher efficiency and wider stability of performance map is still one the bottlenecks to hamper further research development advanced multistage axial-flow compressor. recent rapid growth computational resources artificial intelligence has enabled data mining as most effective potential ways gain a deep insight into complex correlations aerodynamic three-dimensional geometry parameters. In open literatures, however, few works have been found on using that...
The elastic wave bandgap is obviously affected by heat while considering thermal stress. Nevertheless, the flat band, occurring in lowest flexural branch, has not yet been explained clearly. This study investigates influence of stress on a two-dimensional three-component acoustic metamaterial. Simulation results demonstrate that band structure shifts to lower frequency range, and vibration response appears at larger amplitude due bending stiffness being softened compressive membrane force....
In this study, the numerical investigation of thermal effect on band gap dynamical characteristic for a two-dimensional binary structure composed aluminum plate periodically filled with nitrile rubber cylinder is presented. Initially, variation trend increasing temperature studied by taking softening stress into account. A breakthrough made which found being narrower and shifting to lower frequency in environment. The complete higher more sensitive that it disappears increasing. Then some...