METAMATERIALS MEEN 3344 CHRISTOPHER ACOSTA

WHAT ARE METAMATERIALS?  They are an assembly of several individual elements  Engineered structures / split-ring resonators /LC circuits  Primary research of meta-material investigates negative refractive index  Permittivity and Permeability have to be both negative.  the meta-material used has to be smaller than the wavelength

understanding how the speed of light traveling though a refractive index can describe how light or any other radiation propagates though metamaterials. ELECTROMAGNETIC WAVES

USES  The greatest potential of meta-materials is the possibility to create a structure with a negative refractive index  Sub wavelength imaging which is produced by having a negative refractive index, an optical property creating a Super lenses  Phased array technology that could render perfect holograms on a 2D display  Cloaking devices, microwave invisibility cloaks

HOW DO METAMATERIALS ACHIEVE INVISIBILITY light waves can be guided by the metamaterials around the object and back to its original course microwaves wavelengths are measured in centimeters scientists have the technology to create metamaterials small enough to manipulate them, moving waves around an object

LIMITATIONS Light wavelengths are measured in nanometers (billionths of a meter), and the metamaterials needed to block light must be even smaller than that don't currently have the technology to manufacture materials on the small scale required to manipulate light waves cloaking device would have to be arranged to manipulate light on the entire visible spectrum, because different colors exist on different wavelengths Cloaking devices would plunge a person on the inside into darkness By continuing research and funding for metamaterials, these challenges can soon be overcome

WORK SITED William D. Callister, Jr. David G.Rethwisch. Fundamental of Materials Science and Engineering an Intergrated Approach. third edition. Danvers: John Wiley & sons, Maryland, University of. Material Science and Engineeering: Metamaterial A. James Clark School of Engingeering.. Overheim, R.Daniel and David L.Wagner. Light And Color. Ed. Edinboro State College. Jhon Wiley & Sons, INC., Pendry, J.B. superlens - wikipedia, the free encyclopedia. 1 september september Rincon, Paul. "Experts test Cloaking technology." Science reporter, BBC News (2006).