Integrated Optic Chemical-Biological Sensors

Abstract

Planar waveguides have evanescent fields sensitive to index of refraction changes in the volume immediately above the waveguide surface. Optically combining one guided sensing beam with a reference beam in an interferometric configuration generates measurable signals. Applying a chemically selective film over the sensing arm of the interferometer provides the basis for a chemical sensor. Tailored chemistries can be passive (e.g.; inducing swelling or dissolution in a film) or active (e.g.; containing reactive or binding sites). Fast and reversible chemistries are the goal, in most cases for both gaseous and liquid applications. Passive mechanisms are used when the target analyte is relatively inert, i.e. aromatic and chlorinated hydrocarbons.

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Document Details

Document Type
Technical Report
Publication Date
Feb 26, 1999
Accession Number
ADA390348

Entities

People

  • Daniel P. Campbell
  • Janet Cobb
  • Nile F. Hartman

Organizations

  • Georgia Tech Research Corporation

Tags

Communities of Interest

  • Biomedical
  • Sensors

DTIC Thesaurus Topics

  • Biosensors
  • Chemical Detectors
  • Chemical Synthesis
  • Chemistry
  • Detection
  • Detectors
  • Films
  • Materials
  • Materials Science
  • Monitoring
  • Optical Detection
  • Polymers
  • Refractive Index
  • Surface Chemistry
  • Terrorists
  • Warning Systems
  • Waveguides

Fields of Study

  • Physics

Readers

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