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Two-dimensional surface plasmon resonance biosensor array based on phase-sensitive measurement

  • H. P. Ho
  • , K. S. Chan
  • , C. L. Wong
  • , K. F. Lei
  • , W. I. Li
  • , W. C. Law
  • , S. Y. Wu
  • , S. K. Kong
  • , C. Lin

    Research output: Journal Publications and Reviews › RGC 22 - Publication in policy or professional journal

    Abstract

    We report a 2-dimensional surface plasmon resonance (SPR) imaging array sensor based on differential phase measurement between p- and s-polarization. This parallel detection provides the advantage of high-throughput sensing, which is essential in recent biosensing technology. In the differential measurement approach, the signal (p) and reference (s) beams go through exactly identical optical path. This greatly improves the phase detection stability. In the present setup we use a low-cost imaging device and a simple data analysis program to perform the required arrayed sensing operation. The system demonstrates a refractive index resolution of 1×10-4 RIU per degree phase change.
    Original languageEnglish
    Article number59270E
    Pages (from-to)1-10
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Volume5927
    DOIs
    Publication statusPublished - 2005
    EventPlasmonics: Metallic Nanostructures and Their Optical Properties III - San Diego, CA, United States
    Duration: 31 Jul 2005 → 3 Aug 2005

    Research Keywords

    • Biosensors
    • Imaging
    • Interference
    • Surface plasmon resonance

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