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Optical multilayer structure, optical switching device, and image display

  • US 6,940,631 B2
  • Filed: 07/02/2001
  • Issued: 09/06/2005
  • Est. Priority Date: 07/03/2000
  • Status: Expired due to Fees
First Claim
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1. An optical multilayer structure comprising:

  • a substrate;

    a light-absorbing first layer;

    a gap portion having a changeable size capable of causing an optical interference phenomenon; and

    a second layer;

    wherein when a complex index of refraction of the substrate is Ns (=ns



    ks, where ns denotes a refractive index, ks denotes an extinction coefficient, and i represents an imaginary unit), a complex index of refraction of the first layer is N1 (=n1



    k1, where n1 denotes a refractive index, and k1 denotes an extinction coefficient), a refractive index of the second layer is n2, and a refractive index of an incident medium is 1.0, the relation of the following Expression (1) is satisfied
    {(n1

    (n22+1)/2)2+k12

    ((n22

    1)/2)2}{(ns

    (n22+1)/2)2+ks2

    ((n22

    1)/2)2}<

    0 



    (1).

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