Two-dimensional imaging sensor based on the measurement of differential phase related to surface plasmon resonance

Ho-Pui Ho; Wai Wah Lam; Shu-Yuen Wu; Michael Yang

doi:10.1117/12.463451

24 April 2002 Two-dimensional imaging sensor based on the measurement of differential phase related to surface plasmon resonance

Ho-Pui Ho, Wai Wah Lam, Shu-Yuen Wu, Michael Yang

Author Affiliations +

Proceedings Volume 4669, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications III; (2002) https://doi.org/10.1117/12.463451
Event: Electronic Imaging, 2002, San Jose, California, United States

Abstract

The optical phase change associated with the surface plasmon resonance (SPR) effect that exists in a glass-metal- dielectric stack has been studied using a differential phase imaging technique. A typical prism-coupled SPR setup was constructed and a Mach-Zehnder interferometer was used to perform interferometric analysis between the two orthogonal polarizations in the exit beam. By stepping the optical phase of the reference arm, one can measure the phase change caused by the SPR effect. Since the reference and signal beams traverse identical optical paths, we expect that this scheme can be more robust in terms of noise immunity. The interrogation area can be enlarged to enable imaging of the SPR sensing surface. Initial phase measurement obtained from a salt-water mixture will be presented to demonstrate the operation of the technique.

Citation Download Citation

Ho-Pui Ho, Wai Wah Lam, Shu-Yuen Wu, and Michael Yang "Two-dimensional imaging sensor based on the measurement of differential phase related to surface plasmon resonance", Proc. SPIE 4669, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications III, (24 April 2002); https://doi.org/10.1117/12.463451

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