Results 41 to 50 of about 9,355 (217)
Moth wings are acoustic metamaterials [PDF]
Proceedings of the National Academy of Sciences, 2020 Significance Bats and moths are embroiled in an evolutionary arms race. Using ultrasonic biosonar, bats detect their insect prey, which in turn deploy diverse strategies to avoid predation. Here, we show that some moth species evolved wings covered with a canopy of scales that reduces ultrasonic echoes. Our empirical and mathematical analysis
Thomas R. Neil +4 more
openaire +5 more sources
AIP Advances, 2019 The photoacoustic signal from single cell plays an important role in medical diagnosis. Currently, the single-cell photoacoustic detection has limitations.
Jianning Han, Peng Yang, Shuai Tang
doaj +1 more source
Acoustic Willis meta-atom beyond the bounds of passivity and reciprocity
Communications Physics, 2021 Metamaterials are designed to control unconventional wave properties in acoustic systems with a range of applications such as acoustic cloaking. Here, the authors design an active acoustic Willis metamaterial that can realize decoupled polarizabilities ...
Choonlae Cho +3 more
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, 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. +3 more
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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
Zero refractive index in space-time acoustic metamaterials
, 2017 New scientific investigations of artificially structured materials and experiments have exhibit wave manipulation to the extreme. In particular, zero refractive index metamaterials have been on the front line of wave physics research for their unique ...
Fleury, Romain, Koutserimpas, Theodoros
core +1 more source
Topological mechanics of gyroscopic metamaterials
, 2015 Topological mechanical metamaterials are artificial structures whose unusual properties are protected very much like their electronic and optical counterparts.
Irvine, William T. M. +5 more
core +1 more source
Transformation seismology: composite soil lenses for steering surface elastic Rayleigh waves. [PDF]
, 2016 Metamaterials are artificially structured media that exibit properties beyond those usually encountered in nature. Typically they are developed for electromagnetic waves at millimetric down to nanometric scales, or for acoustics, at centimeter scales. By
Colombi, A +3 more
core +2 more sources
Advanced Functional Materials, EarlyView.Guided by the golden ratio, a class of aperiodic architected metamaterials is introduced to address the intrinsic trade‐off between strength and toughness. By unifying local geometric heterogeneity with global order, the golden‐ratio‐guided aperiodic architecture promotes spatial delocalization of damage tolerence regions, leading to more tortuous ...
Junjie Deng +9 more
wiley +1 more source
Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics
Advanced Functional Materials, EarlyView.Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha +18 more
wiley +1 more source