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
  • *Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

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
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5927
DOIs
StatePublished - 2005
Externally publishedYes
EventPlasmonics: Metallic Nanostructures and Their Optical Properties III - San Diego, CA, United States
Duration: 31 07 200503 08 2005

Keywords

  • Biosensors
  • Imaging
  • Interference
  • Surface plasmon resonance

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