Results 61 to 70 of about 175,630 (355)

Reverse Doppler Effect of Sound

, 2009
We report observation of reverse Doppler effect in a double negative acoustic metamaterial. The metamaterial exhibited negative phase velocity and positive group velocity.
C. Caloz, Choon Mahn Park, Chul Koo Kim, P. Markoš, Sam Hyeon Lee, Yong Mun Seo, Zhi Guo Wang   +6 more
core   +1 more source

Structural design and optimization of double-cross shape broadband absorption metamaterial based on CB-ABS

Frontiers in Materials, 2022
This work presents a novel broadband double-cross shape metamaterial structure based on the Carbon Black-Acrylonitrile-Butadiene-Styrene (CB-ABS) composite material.
Mengzhou Chen, Liuying Wang, Gu Liu, Chaoqun Ge, Long Wang, Kejun Xu, Weichao Wang   +6 more
doaj   +1 more source

Kirigami-based Elastic Metamaterials with Anisotropic Mass Density for Subwavelength Flexural Wave Control

, 2017
A novel design of an elastic metamaterial with anisotropic mass density is proposed to manipulate flexural waves at a subwavelength scale. The three-dimensional metamaterial is inspired by kirigami, which can be easily manufactured by cutting and folding
Huang, G. L., Yang, J. K., Yasuda, H., Zhu, R.   +3 more
core   +2 more sources

Microwave modes of ambidextrous helices

Scientific Reports
This work presents an investigation into the electromagnetic properties of ambidextrous helices, structures composed of equal numbers of left- and right-handed turns, operating in the gigahertz frequency range.
J. Gudge-Brooke, N. Clow, A. P. Hibbins, A. W. Powell, J. R. Sambles   +4 more
doaj   +1 more source

Aperiodic-metamaterial-based absorber

APL Materials, 2017
The periodic-metamaterial-based perfect absorber has been studied broadly. Conversely, if the unit cell in the metamaterial-based absorber is arranged aperiodically (aperiodic-metamaterial-based absorber), how does it perform?
Quanlong Yang, Xieyu Chen, Yanfeng Li, Xueqian Zhang, Yuehong Xu, Zhen Tian, Chunmei Ouyang, Jianqiang Gu, Jiaguang Han, Weili Zhang   +9 more
doaj   +1 more source

Broadband absorber with dispersive metamaterials

Nanophotonics, 2023
A broadband absorber that utilizes a dispersive metamaterial and covers the entire microwave X-band (8–12 GHz) is proposed in the present study. An ideal absorber attached to the surface of a perfect electric conductor requires the permittivity of the ...
Han WonHeum, Park Q-Han
doaj   +1 more source

Transmission Enhancement through Sub-Wavelength Aperture Based on Regulable Water-Based Metamaterial

Photonics, 2023
A realization form of the Mie resonance with adjustable characteristics based on a water-based metamaterial is proposed. A novel local electromagnetic field coupling mechanism based on a water-based metamaterial is established, which is used for ...
Pengfei Shi, Xiaodong Li, Hongge Zhao, Youfu Tang, Jingwei Zhu, Renjing Gao, Shutian Liu   +6 more
doaj   +1 more source

A tunable splitter upon a planar hyperbolic metamaterial [PDF]

Радиофизика и электроника, 2020
Subject and Purpose. The paper presents the development and testing of a microwave splitter based on a planar hyperbolic metamaterial with a structural defect.
M.А. Miliaiev, S.V. Nedukh, S.I. Tarapov   +2 more
doaj   +1 more source

CMOS Terahertz Metamaterial Based 64 × 64 Bolometric Detector Arrays [PDF]

, 2017
We present two terahertz detectors composed of microbolometer sensors (vanadium oxide and silicon pn diode) and metamaterial absorbers monolithically integrated into a complementary metal oxide semiconductor (CMOS) process.
Cumming, David R.S., Escorcia Carranza, Ivonne, Gough, John, Grant, James   +3 more
core   +1 more source

Adaptable Tile‐Based Pneumatic Origami through Structurally Coupled Localized Actuation

Advanced Engineering Materials, EarlyView.
This article presents tile‐based pneumatic origami structures with rigid tiles and flexible fabric creases, achieving adaptable properties including morphing shape, selective multistability, and tunable stiffness. Independently pressurized folding bladders at each crease enable structurally coupled localized actuation of origami structures.
Tiantian Li, Jonathan Luntz, Diann Brei
wiley   +1 more source