Results 121 to 130 of about 119,525 (367)
Dual Band Metamaterial Antenna For LTE/Bluetooth/WiMAX System
Scientific Reports, 2018 A compact metamaterial inspired antenna operate at LTE, Bluetooth and WiMAX frequency band is introduced in this paper. For the lower band, the design utilizes an outer square metallic strip forcing the patch to radiate as an equivalent magnetic-current ...
M. Hasan, M. Faruque, M. Islam
semanticscholar +1 more source
Pushing Radiative Cooling Technology to Real Applications
Advanced Materials, EarlyView.Radiative cooling controls surface optical properties for solar and thermal radiation, offering solutions for global warming and energy savings. Despite significant advances, key challenges remain: optimizing optical efficiency, maintaining aesthetics, preventing overcooling, enhancing durability, and enabling scalable production.
Chongjia Lin +8 more
wiley +1 more source
Closed-form formulae of hyperbolic metamaterial made by stacked hole-array layers working at terahertz or microwave radiation [PDF]
, 2017 A metamaterial made by stacked hole-array layers known as a fishnet metamaterial behaves as a hyperbolic metamaterial at wavelength much longer than hole-array period. However, the analytical formulae of effective parameters of a fishnet metamaterial have not been reported hindering the design of deep-subwavelength imaging devices using this structure.
arxiv +1 more source
A Toroidal Metamaterial Switch
Advances in Materials, 2018 Toroidal dipole is a localized electromagnetic excitation that plays an important role in determining the fundamental properties of matter due to its unique potential to excite nearly nonradiating charge–current configuration.
M. Gupta, Y. Srivastava, Ranjan Singh
semanticscholar +1 more source
Reprogrammable Mechanical Metamaterials via Passive and Active Magnetic Interactions
Advanced Materials, EarlyView.The combination of flexible matrices with embedded hard‐magnetic nodes enables metastructures with reprogrammable mechanical properties, even in the absence of external magnetic fields. The evolving interaction between nodes during structural deformation allows mechanical tunability under quasi‐static and dynamic loading, and bistable transitions. This
Carlos Perez‐Garcia +7 more
wiley +1 more source
Hybrid acoustic metamaterial as super absorber for broadband low-frequency sound
Scientific Reports, 2017 A hybrid acoustic metamaterial is proposed as a new class of sound absorber, which exhibits superior broadband low-frequency sound absorption as well as excellent mechanical stiffness/strength.
Yufan Tang +7 more
semanticscholar +1 more source
Nature Reviews Physics, 2019 International audience; Metamaterials are rationally designed composites aiming at effective material parameters that go beyond those of the ingredient materials. For example, negative metamaterial properties, such as the refractive index, thermal expansion coefficient or Hall coefficient, can be engineered from constituents with positive parameters ...
Kadic, M. +3 more
openaire +5 more sources
A Bio‐Inspired Perspective on Materials Sustainability
Advanced Materials, EarlyView.This perspective discusses natural materials as inspiration for sustainable engineering designs and the processing of materials. First, circularity, longevity, parsimony, and activity are presented as essential material paradigms. The perspective then uses many examples of natural and technical materials to introduce principles such as oligo ...
Wolfgang Wagermaier +2 more
wiley +1 more source
Quantum Metamaterials: Applications in quantum information science [PDF]
arXiv, 2020 Metamaterials are artificially engineered periodic structures with exceptional optical properties that are not found in conventional materials. However, this definition of metamaterials can be extended if we introduce a quantum degree of freedom by adding some quantum elements (e.g quantum dots, cold atoms, Josephson junctions, molecules).
arxiv
How to face the loss in plasmonics and metamaterials [PDF]
, 2014 Metal losses affect the performance of every plasmonic or metamaterial structure; dealing with them will determine the degree to which these structures will find practical applications.
arxiv +1 more source