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Evanescent nanosensor using an optical resonator

  • US 7,228,016 B2
  • Filed: 05/11/2005
  • Issued: 06/05/2007
  • Est. Priority Date: 05/11/2005
  • Status: Active Grant
First Claim
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1. A sensor comprising:

  • an optical resonator;

    a trap positioned to hold a captured particle of a contaminant within an evanescent field around the optical resonator; and

    a measurement system capable of detecting an effect of captured particles on the optical resonator, wherein the measurement system measures a change in a characteristic of the optical resonator, and the characteristic is selected from the group consisting of a quality factor, a finesse, and a photon lifetime of the optical resonator.

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