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Surface plasmon noncontact electric field sensors and related methods

  • US 7,773,228 B1
  • Filed: 08/12/2008
  • Issued: 08/10/2010
  • Est. Priority Date: 08/15/2007
  • Status: Expired due to Fees
First Claim
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1. A surface-plasmon electric field sensor, comprising:

  • a light source for emitting plane-polarized light having a free-space wavelength;

    a photodetector; and

    a plasmonic portion comprising;

    an electro-optic layer having a first surface opposite a second surface,a transparent conductive layer disposed upon the first surface of the electro-optic layer,a metallic layer disposed upon the second surface of the electro-optic layer, anda dielectric layer;

    wherein the metallic layer has alternating grating and smooth regions, each smooth region having a cavity length near a multiple of an effective wavelength of the light in the electro-optic layer, and each grating region having lines on a pitch near the effective wavelength.

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