Results 71 to 80 of about 40,603 (292)

Acoustoelectric conversion and deep-subwavelength acoustic focusing based on Fresnel zone plates

AIP Advances, 2023
Fresnel zone plates (FZP) with quasi-planar structure and ultrathin thickness are capable of focusing light or acoustic waves efficiently. In this paper, we employ the FZP to manipulate the wave fields and suggest two acoustic functionalities.
Xue-ying Gao, Xiao-bin Cui, Yong Zhang, Jie-jun Zhu, Cheng-ping Huang   +4 more
doaj   +1 more source

Acoustic Focusing and Energy Confinement Based on Multilateral Metasurfaces

, 2017
International audienceMetamaterial-based acoustic wave manipulation shows great potential in effective acoustic energy confinement and low-frequency acoustic isolation.
Assouar, B., Shuibao Qi, Qi, Shuibao, Badreddine Assouar, Li, Yong, Yong Li   +5 more
core   +1 more source

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

Advanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev, Noah‐Lean Roschlaub, Anne Jung   +2 more
wiley   +1 more source

Emergent Topological Magnons and Thermal Hall Effect in 2D Filling‐Enforced Fully Compensated Ferrimagnets

Advanced Functional Materials, EarlyView.
Schematic illustration of ferroelectric‐intercalation‐driven transitions in magnetic configurations and magnonic topological phases, together with the symmetry relations of magnonic Berry curvature. ABSTRACT Magnons in collinear magnets with vanishing net magnetization offer unique advantages for spin transport, including ultrafast dynamics and ...
Yingxi Bai, Bo Yuan, Zhenzhou Guo, Jian Zhang, Ying Dai, Baibiao Huang, Xiaotian Wang, Chengwang Niu, Gang Zhang   +8 more
wiley   +1 more source

Simulation Analysis of Thermoacoustic Effect of CNT Film with Metasurface-Enhanced Acoustic Autofocusing

Nanomaterials
This study introduces a novel thermoacoustic (TA) focusing system enhanced by Airy beam-based acoustic metasurfaces, significantly improving acoustic focusing and efficiency. The system integrates a TA emitter, fabricated from carbon nanotube (CNT) films,
Dalun Rong, Zhe Li, Qianshou Qi, Zhengnan Liu, Zhenhuan Zhou, Xinsheng Xu   +5 more
doaj   +1 more source

Unlocking Multi‐Valley Energy Pockets and Interface‐Induced Phonon Filtering in InSb Thermoelectrics by Reaction‐Driven Interface Engineering

Advanced Functional Materials, EarlyView.
InSb, a narrow‐bandgap semiconductor with high carrier mobility, is promising for thermoelectric energy conversion but suffers from high lattice thermal conductivity and strong bipolar conduction. Here, in situ interface engineering using Co2O3 nanoprecursors forms hierarchical CoSbx/In2O3/CoSb3 heterostructures that enhance phonon scattering and ...
Jiwu Xin, Xiao Yang, Xiao‐Lei Shi, Chengyun Xu, Xi Ling, Pengyu Zhang, Jinfeng Dong, Yong Du, Haisheng Chen, Ting Zhang, Zhi‐Gang Chen   +10 more
wiley   +1 more source

Acoustooptic in-fiber modulator using acoustic focusing [PDF]

IEEE Photonics Technology Letters, 1993
A new efficient in-fiber acoustooptic phase modulator is demonstrated in which the acoustic wave is focused onto the fiber by reflection from a cylindrical surface. The device exhibits a phase modulation of 2.63 rad at a light wavelength of 1550 nm, using an RF frequency of 86 MHz and power of 1 W. >
Abdulhalim, I., Pannell, C.N.
openaire   +2 more sources

A Non‐Reciprocal Architected Porous Medium

Advanced Functional Materials, EarlyView.
ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies, Pablo Zavattieri, Nicolás Silin   +2 more
wiley   +1 more source

Horizontal Detection Range Estimation of Deep-Sea Acoustic Shadow Area Based on Vertical Phased Emission Array

Journal of Marine Science and Engineering
To scan the horizontal range of the deep-sea shadow zone with high accuracy and efficiency, enabling active target detection, a horizontal detection range estimation method based on phased sound focusing technology is presented.
Naibin Chen, Dayong Peng, Li Ma, Tao Hu, Haijun Liu, Haifeng Li   +5 more
doaj   +1 more source

Laser induced short plane acoustic wave focusing in water

, 2007
Laser induced high frequency acoustic wave generation, propagation, and focusing in water are studied. A large area, flat, and short duration acoustic wave was generated by the thermoelastic interaction of a homogenized short pulsed laser beam with the ...
Grigoropoulos, Costas P., Panides, Elias, Nick Kladias, Elias Panides, Heng Pan, Costas P. Grigoropoulos, Seung H. Ko, Nipun Misra, Sang G. Ryu, Ko, Seung Hwan, Kladias, Nick, Domoto, Gerald A., Gerald A. Domoto, Misra, Nipun, Pan, Heng, Ko, Seung H., Ryu, Sang G.   +16 more
core   +1 more source