Results 41 to 50 of about 514,003 (233)

Breaking the Surface: Buoyant Metal–Polymer Open–Cell Hybrid Lattice Metamaterials

Advanced Materials, EarlyView.
Open‐cell metal–polymer lattice metamaterials that defy sinking. (a) Injection process of the polyurethane (PU) foam into the titanium (Ti‐6Al‐4V) hollow‐strut lattice creating the open‐cell Ti‐6Al‐4V+PU hybrid lattice, (b) flotation test of a hybrid lattice specimen, and (c) a digital representation and experimental validation of a marine buoy ...
Jordan Noronha, Joey Tallon, Raad Omar, Jason Dash, Andrey Molotnikov, Martin Leary, Milan Brandt, Ma Qian   +7 more
wiley   +1 more source

Microelectromechanical Maltese-cross metamaterial with tunable terahertz anisotropy

, 2012
Dichroic polarizers and waveplates exploiting anisotropic materials have vast applications in displays and numerous optical components, such as filters, beamsplitters and isolators. Artificial anisotropic media were recently suggested for the realization
Zhu, W.M., Zhang, X.H., Bourouina, T., Kwong, D.L., Tsai, D.P., Liu, A.Q., Lo, G.Q., Zheludev, N.I., Teng, J.H.   +8 more
core   +1 more source

Optimization design of the acoustic metamaterial based on the co-simulation method

AIP Advances, 2022
Once the structure of a metamaterial is fixed, it has the property of controlling elastic waves in a fixed frequency range. To obtain a metamaterial with an optimal structure, a co-simulation optimization method is proposed in this paper to optimize the ...
Bingfei Liu, Fuxing Chen
doaj   +1 more source

Acoustic jet based on acoustic metamaterial

, 2021
In this paper, a novel gradient index (GRIN) acoustic metamaterial is proposed based on the concept of optical modified generalized Luneburg lens (MGLL). With the MGLL, double-foci and high energy density between the two foci can be achieved, which enables the realization of an ultra-long acoustic jet between the two foci.
Zhao, Liuxian, Horiuchi, Timothy, Yu, Miao   +2 more
openaire   +2 more sources

Microscale 3D‐Printed Digital Strain Switches for Embedded Mechanical Computation

Advanced Materials Technologies, EarlyView.
Microscale 3D‐printed strain switches on flexible films convert deformation into native digital signals at geometry defined thresholds. A closed form model predicts switching from 3000 to 15 000 microstrain and is validated across 110 devices. Reliable ohmic closure and strain activated AND, OR, and XOR logic point toward low‐power mechanical ...
Regan Kubicek, Daniel Quinn, Gabriel Smith, Sarah Bergbreiter   +3 more
wiley   +1 more source

Broadband Acoustic Hyperbolic Metamaterial

Physical Review Letters, 2015
Acoustic metamaterials (AMMs) are engineered materials, made from subwavelength structures, that exhibit useful or unusual constitutive properties. There has been intense research interest in AMMs since its first realization in 2000 by Liu et al. A number of functionalities and applications have been proposed and achieved using AMMs.
Shen, Chen, Xie, Yangbo, Sui, Ni, Wang, Wenqi, Cummer, Steven A., Jing, Yun   +5 more
openaire   +4 more sources

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

Advanced Optical Materials, EarlyView.
A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio, Giulio Carotta, Lorenzo Lavista, Andrea Camposeo, Giacomo Venturi, Agnese Guernieri, Alessandro Pitanti, Simon A. R. Horsley, Giuseppe C. La Rocca, Alessandro Tredicucci, Simone Zanotto   +10 more
wiley   +1 more source

An active viscoelastic metamaterial with enhanced band gap properties

, 2013
Metamaterials have been the subject of significant interest over the past decade due to their ability to produce novel acoustic behaviour beyond that seen in naturally occurring media.
Gao, Yan, Reynolds, Matthew, Daley, Stephen   +2 more
core   +1 more source

Acoustic focusing effect of composite metamaterial column in air

Journal of Measurement Science and Instrumentation, 2017
The acoustic focusing effect of metamaterial has a wide range of applications in medicine,acoustic imaging,signal detection,etc.This paper presents an acoustic metamaterial applied to the acoustic focusing effect.The formation of acoustic metamaterial is
HAN Jian-ning, ZHEN Wen-xiang, QIN Jia-jie, WU Yu-peng, TANG Shuai, Key Laboratory of Instrumental Science & Dynamic Measurement   +5 more
doaj  

Study on acoustic performance of new spiral sound absorbing and insulating metamaterial

Journal of Low Frequency Noise, Vibration and Active Control
Middle and low frequency band sound waves have strong penetration and diffraction abilities during the propagation process, making it difficult to attenuate.
Song Liu, Pan-pan Liu, Ren-jie Zhao, Jian-hua Lu, Kang Yang, Huayu Zhou, Yi-fan Du   +6 more
doaj   +1 more source