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An acoustic metamaterial, sonic crystal, or phononic crystal is a material designed to manipulate sound waves or phonons in gases, liquids, and solids (crystal lattices).By carefully controlling properties such as the bulk modulus β, density ρ, and chirality, these materials can be tailored to interact with sound in specific ways, such as transmitting, trapping, or amplifying waves at ...
3D-chiral metamaterials are constructed from chiral materials or resonators in which the effective chirality parameter is non-zero. Wave propagation properties in such chiral metamaterials demonstrate that negative refraction can be realized in metamaterials with a strong chirality and positive ε r {\displaystyle \varepsilon _{r}} and μ r ...
Stereolithography or "SLA" printing is an early and widely used 3D printing technology. In the early 1980s, Japanese researcher Hideo Kodama first invented the modern layered approach to stereolithography by using ultraviolet light to cure photosensitive polymers.
Robotic materials are composite materials that combine sensing, actuation, computation, and communication in a repeatable or amorphous pattern. [1] Robotic materials can be considered computational metamaterials in that they extend the original definition of a metamaterial [2] as "macroscopic composites having a man-made, three-dimensional, periodic cellular architecture designed to produce an ...
It can be further minimized by using an achromatic lens or achromat, in which materials with differing dispersion are assembled together to form a compound lens. The most common type is an achromatic doublet, with elements made of crown and flint glass. This perfectly corrects the aberration at two wavelengths and reduces the amount of ...
Developments in this field focus on advances in research of transformation optics. Transformation optics is the foundation for exploring a diverse set of theoretical, numerical, and experimental developments, involving the perspectives of the physics and engineering communities.
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Three-dimensional (3D) microfabrication refers to manufacturing techniques that involve the layering of materials to produce a three-dimensional structure at a microscopic scale. [1] These structures are usually on the scale of micrometers and are popular in microelectronics and microelectromechanical systems .