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Optical element, refractive index sensor, refractive index sensor array, and biosensor

  • US 8,269,956 B2
  • Filed: 07/09/2009
  • Issued: 09/18/2012
  • Est. Priority Date: 07/18/2008
  • Status: Active Grant
First Claim
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1. An optical element for resonating and reflecting incident light having a wavelength, comprising:

  • a periodic structure formed of protrusions and recessions, a period of the periodic structure being equal to or less than the wavelength of the incident light, and the incident light having the wavelength being resonated and reflected by a resonance caused between the incident light and the protrusions and recessions,wherein widths of the protrusions are spatially changed.

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