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Light emitting device

  • US 20040206972A1
  • Filed: 11/26/2003
  • Published: 10/21/2004
  • Est. Priority Date: 04/15/2003
  • Status: Active Grant
First Claim
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1. A light-emitting device, comprising:

  • a multi-layer stack of materials including a layer of n-doped material, a layer of p-doped material, and a light-generating region; and

    a layer of reflective material that is capable of reflecting at least about 50% of light generated by the light-generating region that impinges on the layer of reflective material, wherein;

    a surface of the layer of n-doped material is configured so that light generated by the light-generating region can emerge from the light-emitting device via the surface of the layer of n-doped material;

    the surface of the layer of n-doped material has a dielectric function that varies spatially according to a pattern; and

    a distance between the layer of p-doped material and the layer of reflective material is less than a distance between the layer of n-doped material and the layer of reflective material.

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