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Metamaterials MEEN 3344 Christopher Acosta

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

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Metamaterials MEEN 3344 Christopher Acosta

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  1. MetamaterialsMEEN 3344Christopher Acosta

  2. 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

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

  4. 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

  5. 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

  6. 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

  7. Work sited • William D. Callister, Jr. David G.Rethwisch. Fundamental of Materials Science and Engineering an Intergrated Approach. third edition. Danvers: John Wiley & sons, 2008. • Maryland, University of. Material Science and Engineeering: Metamaterial. 2006-2001. A.   • James Clark School of Engingeering. <http://www.mse.umd.edu/whatismse/metamaterials.html>. • Overheim, R.Daniel and David L.Wagner. Light And Color. Ed. Edinboro State College. Jhon Wiley & Sons, INC., 1982. • Pendry, J.B. superlens - wikipedia, the free encyclopedia. 1 september 2012. 3 september 2013 <http://en.wikipedia.org/wiki/superlens>. • Rincon, Paul. "Experts test Cloaking technology." Science reporter, BBC News (2006).

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