Introduction
Metamaterial means a kind of material which is created with some , they always made from multiple elements and with typical structures. The concept of metamaterials stems from phenomena and theoretical predictions of the dielectric constant and magnetic permeability of negative electrode materials observed by the Soviet theoretical physicist Fresler. [1]At present, metamaterials are generally defined as artificial composite structures or composite materials having extraordinary physical properties that natural materials do not possess, and are artificial structural materials having special electromagnetic characteristics formed by arranging artificial cell structures in a specific manner.
Typical metamaterials include "left-handed materials", photonic crystals, "supermagnetic materials" and the like. Their precise shape, geometry, size,orientation and arrangement gives them their smart properties capable of manipulating electromagnetic waves: by blocking, absorbing, enhancing ,or bending waves, to achieve benefits that go beyond what is possible with conventional materials.
[1]wikipedia-MetamateialThe functioning electromagnetic metamaterials was first reported in 2000,by Smith et al.Microwave frequency metamaterials are usually constructed as arrays of electrically conductive elements that have suitable inductive and capacitive characteristics.
\(\)