Digital Metamaterial Flat Lenses (IMAGE)
Caption
A metamaterial with a given permittivity can be designed out of any two materials, called 'metamaterial bits,' so long as the permittivity of one of the materials is positive and the other is negative. Borrowing terms from binary computing, these 'digital' metamaterials are composed of metamaterial 'bits,' which are combined into 'bytes.' A lens made out of identical metamaterial bytes (above) can be made flat by altering the composition of the bytes (below).
Credit
University of Pennsylvania
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