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The history of metamaterials begins with artificial dielectrics in microwave engineering as it developed just after World War II. Yet, there are seminal explorations of artificial materials for manipulating electromagnetic waves at the end of the 19th century. [ 1 ]
Hyperbolic metamaterials (HMMs) behave as a metal for certain polarization or direction of light propagation and behave as a dielectric for the other due to the negative and positive permittivity tensor components, giving extreme anisotropy.
[6] [7] In metamaterials, cells take the role of atoms in a material that is homogeneous at scales larger than the cells, yielding an effective medium model. [3] [4] [8] [6] [9] Some photonic metamaterials exhibit magnetism at high frequencies, resulting in strong magnetic coupling. This can produce a negative index of refraction in the optical ...
Metamaterials Handbook is a two-volume handbook on metamaterials edited by Filippo Capolino professor of electrical engineering in University of California. [1] [2] The series is designed to cover all theory and application topics related to electromagnetic metamaterials. Disciplines have combined to study, and develop electromagnetic ...
Mechanical properties, including elasticity, viscoelasticity, and thermoelasticity, are central to the design of mechanical metamaterials. They are often also referred to as elastic metamaterials or elastodynamic metamaterials. Their mechanical properties can be designed to have values that cannot be found in nature, such as negative stiffness ...
Bands used for smart watches and fitness trackers contain a synthetic rubber made with PFAS — also known as “forever chemicals” — and researchers are warning that these may be absorbed ...
Metamaterials, on the other hand, are an innovation that are able to achieve negative refractive index, zero refractive index, and fractional values in between zero and one. Hence, metamaterials extend the material response, among other capabilities. However, negative refraction is not the effect that creates invisibility-cloaking.
My tech startup failed due to 3 mistaken assumptions—entrepreneurs take note. Mona Sabet. Updated January 24, 2025 at 3:09 PM. Mona Sabet.