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Related Experiment Video

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Development of phase detection schemes based on surface plasmon resonance using interferometry.

Muhammad Kashif1, Ahmad Ashrif A Bakar2, Norhana Arsad3

  • 1Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia. kaashpk@bzu.edu.pk.

Sensors (Basel, Switzerland)
|August 30, 2014
PubMed
Summary

Surface plasmon resonance (SPR) interferometry offers high sensitivity and spatial phase resolution for real-time molecular binding detection. This study explores advancements in SPR phase interferometry for enhanced biological and chemical sensing applications.

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Area of Science:

  • Optics and Photonics
  • Biotechnology
  • Chemical Sensing

Background:

  • Surface plasmon resonance (SPR) is a key optical sensing technique for real-time molecular binding monitoring.
  • Interferometry provides accurate measurement of SPR changes, crucial for sensor applications.
  • SPR interferometry, particularly phase detection, offers superior sensitivity and resolution compared to amplitude-based methods.

Purpose of the Study:

  • To discuss advancements in interferometric SPR methods for measuring phase shifts.
  • To compare the sensitivity, dynamic range, and resolution of different analytes using SPR interferometry.
  • To explore the application of SPR phase interferometry in biological and chemical sensors.

Main Methods:

  • Utilized interferometry techniques to measure SPR changes.
  • Employed phase detection in SPR interferometry for enhanced measurement.
  • Investigated Fabry-Perot, Michelson, and Mach-Zehnder interferometers for SPR sensing.

Main Results:

  • SPR phase interferometry demonstrates high sensitivity and spatial phase resolution.
  • Phase changes in SPR interferometry occur more rapidly than intensity, angle, or wavelength methods.
  • Evaluated performance parameters of different interferometric configurations for SPR sensing.

Conclusions:

  • SPR phase interferometry presents significant advantages for sensitive and high-resolution sensing.
  • Advancements in interferometric SPR methods can enhance performance for future biological and chemical sensors.
  • Detailed analysis of Fabry-Perot, Michelson, and Mach-Zehnder interferometers provides insights for improved sensor design.