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High-sensitivity small-angle sensor based on surface plasmon resonance technology and heterodyne interferometry.

Shinn-Fwu Wang1, Ming-Hung Chiu, Chih-Wen Lai

  • 1Department of Electronic Engineering, Ching Yun University, Jhongli City, Taoyuan, Taiwan, ROC.

Applied Optics
|August 24, 2006
PubMed
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A novel surface plasmon resonance sensor offers high-sensitivity small-angle measurement. This innovative technique achieves high resolution and rapid measurements, demonstrating its practical feasibility for precise angular detection.

Area of Science:

  • Optics and Photonics
  • Sensor Technology

Background:

  • Surface plasmon resonance (SPR) is a powerful optical sensing technique.
  • Heterodyne interferometry offers high precision in phase measurement.
  • Accurate small-angle measurement is crucial in various scientific and industrial applications.

Purpose of the Study:

  • To propose a high-sensitivity small-angle sensor.
  • To leverage surface plasmon resonance (SPR) and heterodyne interferometry.
  • To introduce a novel design using two right-angle prisms for enhanced performance.

Main Methods:

  • Development of a new optical setup incorporating two right-angle prisms.
  • Integration of surface plasmon resonance (SPR) technology.
  • Application of heterodyne interferometry for precise angle detection.

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Main Results:

  • Achieved theoretical resolution of 1.2x10(-7) radians.
  • Demonstrated high sensitivity and high resolution for small-angle measurements.
  • Operates within a measurement range of -0.15 to +0.15 degrees.

Conclusions:

  • The proposed sensor design offers a novel method for high-sensitivity small-angle sensing.
  • The technique presents advantages such as a simple optical setup, ease of operation, and rapid measurement.
  • Feasibility of the high-sensitivity small-angle sensor has been successfully demonstrated.