Negative refraction and the minimum lattice cell size
作者： Igor Tsukerman
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摘要: Artificial periodic structures (metamaterials and photonic crystals) with feature sizes smaller than the wavelength can be capable of supporting backward waves producing negative refraction. However, may only exist if lattice cell size is a sufficiently large fraction vacuum and/or Bloch wavelength. Explicit lower bounds for are established imply, in particular, limit on optical resolution negative-index lenses. A key tool analysis Fourier decomposition related eigenfrequency estimates. Numerical examples detailed exposition mechanism included.
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