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Metamaterials - Crossref

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Last Updated: 23 April 2022

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Deep learning modeling strategy for material science: from natural materials to metamaterials

Abstract Computational modeling is a key component of material-based research for finding new materials with superior properties. The linked data-driven modeling paradigm also supports a change in materials science, from trial-and-error experiments to advanced material discovery and analysis. The research seeks to uncover the logic behind data model relation in the content analysis and the corresponding problem-solving DL model architectures, with a focus on optimal data structures for various scenarios.

Source link: https://doi.org/10.1088/2515-7639/ac5914


Inverse Doppler Effects in Broadband Acoustic Metamaterials

Abstract: The Doppler effect refers to the increase in the frequency of a wave source as a result of the relative motion between the source and an observer. Veselago theoretically predicted that materials with negative refractions would have inverse Doppler effects. However, these metamaterial design approaches' preferred material parameters are both difficult and impossible to obtain experimentally. These omni-directional, double-negative, acoustic metamaterials are produced with seven double meta-molecules, surpassing broadband negative bulk modulus and mass density limitations to produce a region of negative refraction and inverse Doppler effects in this region. These omni-directional, double-negative, acoustic metamaterials are also manufactured with seven double meta-molecules; these metamaterials can also be made with seven double meta-molecules; these metamaterials.

Source link: https://doi.org/10.1038/srep32388


Composite Metamaterials: Classification, Design, Laws and Future Applications

The naturally occurring materials in science and applications have reached a point where they are no longer suitable for the required properties. Metamaterials are synthetic products that obtain their characteristics from their precisely engineered meta-atoms rather than their constituents. Compared to light's wavelength, the meta-atom's volume is negligible compared to the light's wavelength. A metamaterial is a term that has been developed in order to have properties that are not present in naturally occurring materials. These properties maintain MMs' ability to manipulate the electromagnetic waves by promoting, hindering, absorbing waves in order to reach an interest that goes beyond the natural materials' potency. In a unique process never found in natural materials, the apt design of MMs maintains their ability of influencing the electromagnetic radiation or sound. MMs' potential uses are numerous, ranging from medical, aerospace, sensors, solar-power management, crowd control, antennas, army troops, and reaching earthquakes shielding and seismic materials.

Source link: https://doi.org/10.5772/intechopen.100861


Mechanical properties of the novel folded kirigami metamaterials under quasi-static compression

Abstract Origami and kirigami are two common methods to produce the light cellular metamaterials with unique mechanical properties. The research of this paper shows that a novel metamaterial similar to the standard Kelvin foams is developed and manufactured by the origami and kirigami processes. To determine the deformation characteristics and stress-strain responses, quasi-static compression experiments were first applied. The kinetic energy is mainly dissipated by unfolding the constitutive components along the creases, according to the study, and three standard stages are constructed in the stress-strain curves.

Source link: https://doi.org/10.1088/1361-665x/ac68b4


Analogue Quantum Gravity in Hyperbolic Metamaterials

The sound waves in hyperbolic metamaterials appear to be remarkably similar to gravitational waves, according to this approximation, and so quantized sound waves appear to be similar to gravitational waves. Such an analogue representation of quantum gravity becomes particularly useful near phase transitions in hyperbolic metamaterials, where it is possible to toggle quantum gravity effects on and off as a function of metamaterial temperature.

Source link: https://doi.org/10.3390/universe8040242


Ultra-Narrowband Anisotropic Perfect Absorber Based on α-MoO3 Metamaterials in the Visible Light Region

Optically anisotropic materials such as phthalometer-dependent optical systems have a major advantage in the manufacture of polarization-dependent optical devices. In the visible light region, the constructed absorber will have ultra-narrowband perfect absorption for polarizations along [100] and [001] crystalline directions. In addition, the effects of some geometric parameters on the optical absorption spectra are investigated. Interestingly, the single-band perfect absorption in our proposed metamaterials can be arbitrarily extended to multi-band flawless absorption by adjusting the thickness of the dielectric layer. In the visible light region, our research has shown that our results may have a place in the development of anisotropic optical systems with tunable spectrum and selective polarization.

Source link: https://doi.org/10.3390/nano12081375


Tunable terahertz fishnet metamaterials based on thin nematic liquid crystal layers for fast switching

Abstract: In the terahertz range, electrically tunable characteristics of liquid-crystal fishnet metamaterials are theoretically investigated. Tuning of the nematic molecular orientation can alter the magnetic resonance frequency of the metamaterial and its overall electromagnetic response. The response speed of the tunable metamaterial is determined as orders of magnitude quicker than in reported liquid-crystal based non-resonant terahertz components.

Source link: https://doi.org/10.1038/srep13137

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions