1 July 2003 Measurement of the concentration of a solution with surface plasmon resonance heterodyne interferometry
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Abstract
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)
Kun-Huang Chen, Kun-Huang Chen, Cheng-Chih Hsu, Cheng-Chih Hsu, Der-Chin Su, 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 . Submission:
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