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UV-reflective structural color

  • US 8,446,666 B2
  • Filed: 05/18/2009
  • Issued: 05/21/2013
  • Est. Priority Date: 05/18/2009
  • Status: Active Grant
First Claim
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1. A multilayer structure comprising:

  • a plurality of alternating layers of a low index of refraction material and a high index of refraction material;

    said plurality of alternating layers of said low index of refraction material and said high index of refraction material reflecting electromagnetic radiation in the ultraviolet region and a narrow band of electromagnetic radiation in the visible region;

    said plurality of alternating layers of said low index of refraction material and said high index of refraction material having a layered structure described by [A 0.5 qH pL (qH pL)N 0.5 qH G], where;

    A represents air;

    q is a multiplier of a quarter-wave thickness of said high index of refraction material;

    H is the quarter wave thickness of the high refracting index material for a given wavelength λ

    0;

    p is a multiplier of a quarter-wave thickness of said low index of refraction material;

    L is the quarter-wave thickness of the low refracting index material for said given wavelength λ

    0;

    N represents the total number of layers between bounding half layers of said high index of refraction material; and

    G represents a substrate.

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