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Structures for polarization and beam control

  • US 20060127830A1
  • Filed: 11/03/2005
  • Published: 06/15/2006
  • Est. Priority Date: 12/15/2004
  • Status: Abandoned Application
First Claim
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1. An article, comprising:

  • a layer including a plurality of rows of a first material extending along a first direction, the rows being spaced apart from each other and a center of each adjacent row being separated by a distance less than a wavelength λ

    so that for radiation of wavelength λ

    propagating along a path through the layer, the layer has a first effective index of refraction, n1, for the radiation having a first polarization state and the layer has second effective index of refraction, n2, for the radiation having a second polarization state orthogonal to the first polarization state, where n1 and n2 are different, where a surface of the layer includes a plurality of trenches, the trenches extending along a second direction and being spaced apart from each other, where a center of each adjacent trench is separated by a distance more than wavelength λ

    , and the trenches are filled with a second material having a refractive index, n3, different from n2.

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