Study of the measurement of solution concentration by surface plasmon resonance heterodyne interferometer

Kun Huang Chen, Chenb Jing-Heng Chenb, Jiun-You Lin, Changb Wei-Yao Changb, Hsiehb Hsiang-Yung Hsiehb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study a non-contact method for accurately measuring small concentration of solutions by surface plasmon resonance heterodyne interferometer is proposed. Firstly, a linearly polarized heterodyne light source is transmitted hrough a test box filled with pure water. The transmitted light is incident on the base of a hemi-spherical prism of a surface plasmon resonance apparatus. Then the reflected light passes through an analyzer and generates an interference signal on a photo-detector. Secondly, when the incident angle is chosen at resonant angle, a significant phase difference between the s- and p-polarized components occurs. This phase difference is a function of the incident angle at the base of the hemi-spherical prism. Finally, when the test box is filled with a test solution, the incident angle at the base of the hemi-spherical prism is changed. This causes a variation in the phase difference that can be detected by the heterodyne interferometry. Therefore, the concentration of the tested solution can be accurately determined with special derived equations. The validity of this method was demonstrated experimentally. The advantages of the propose method include a simple apparatus, rapid measurement, high stability, and high resolution. Due to the introduction of a common-path structure, the interference signal is not affected by surrounding fluctuations and can be captured easily.

Original languageEnglish
Title of host publicationOptical Measurement Systems for Industrial Inspection VI
Volume7389
DOIs
Publication statusPublished - 2009 Sep 14
EventOptical Measurement Systems for Industrial Inspection VI - Munich, Germany
Duration: 2009 Jun 152009 Jun 18

Other

OtherOptical Measurement Systems for Industrial Inspection VI
CountryGermany
CityMunich
Period09-06-1509-06-18

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Chen, K. H., Jing-Heng Chenb, C., Lin, J-Y., Wei-Yao Changb, C., & Hsiang-Yung Hsiehb, H. (2009). Study of the measurement of solution concentration by surface plasmon resonance heterodyne interferometer. In Optical Measurement Systems for Industrial Inspection VI (Vol. 7389). [73892F] https://doi.org/10.1117/12.826857