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Chip-scale optical spectrum analyzers with enhanced resolution

  • US 7,426,040 B2
  • Filed: 08/19/2005
  • Issued: 09/16/2008
  • Est. Priority Date: 08/19/2004
  • Status: Active Grant
First Claim
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1. A device comprising:

  • a Fabry-Perot cavity filter comprising a first mirror and a second mirror, wherein a gap between the first and the second mirror monotonically varies as a function of width of the filter; and

    a channel selection filter comprising a metal nanooptic filter array based on plasmon resonance,wherein the channel selection filter has a wider wavelength passband width than the Fabry-Perot cavity filter andwherein the metal nanooptic filter array comprises a plurality of subwavelength apertures in a metal film or between metal islands, such that a distance between the apertures in different regions of the metal nanooptic filter array is different.

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