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Gratings, related optical devices and systems, and methods of making such gratings

  • US 20060001969A1
  • Filed: 11/15/2004
  • Published: 01/05/2006
  • Est. Priority Date: 07/02/2004
  • Status: Abandoned Application
First Claim
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1. An article, comprising:

  • a first layer comprising a first material and having a surface with a cross-sectional profile comprising a plurality of portions and at least one peak and at least one trough; and

    a second layer adjacent the first layer, the second layer comprising a second material and having a surface with a cross-sectional profile comprising a plurality of portions corresponding to the portions of the cross-sectional profile of the surface of the first layer and at least one peak and at least one trough, wherein the corresponding portions have an angular orientation within about 10% or less of each other and a length within about 10% or less of each other, the first and second materials are different and the article is birefringent for a wavelength, λ

    , where λ

    is in a range from about 150 nm to about 2,000 nm.

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