Measurement of the concentration of a solution with surface plasmon resonance heterodyne interferometry

Kun-Huang Chen; Cheng-Chih Hsu; Der-Chin Su

doi:10.1117/1.1577115

1 July 2003 Measurement of the concentration of a solution with surface plasmon resonance heterodyne interferometry

Kun-Huang Chen, Cheng-Chih Hsu, Der-Chin Su

Optical Engineering, Vol. 42, Issue 7, (July 2003). https://doi.org/10.1117/1.1577115

A linearly polarized light beam is incident on the boundary surface between the thin metal film of a surface plasmon resonance (SPR) apparatus and the tested solution. If the incident angle is very near to the resonant angle, then the phase difference between p- and s-polarizations of the reflected light is changed with the concentration of the solution. The phase difference can be measured accurately by heterodyne interferometry. Based on these effects, a method for measuring the concentration of a solution is presented. Because the reflected light is measured, only a small quantity of the solution is required. In addition, the method has the advantages of both common-path interferometry and heterodyne interferometry.

©(2003) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Kun-Huang Chen, Cheng-Chih Hsu, and Der-Chin Su "Measurement of the concentration of a solution with surface plasmon resonance heterodyne interferometry," Optical Engineering 42(7), (1 July 2003). https://doi.org/10.1117/1.1577115

Published: 1 July 2003

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