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Proceedings Paper

Two-dimensional imaging sensor based on the measurement of differential phase related to surface plasmon resonance
Author(s): Ho-Pui Ho; Wai Wah Lam; Shu-Yuen Wu; Michael Yang
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Paper 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.

Paper Details

Date Published: 24 April 2002
PDF: 9 pages
Proc. SPIE 4669, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications III, (24 April 2002); doi: 10.1117/12.463451
Show Author Affiliations
Ho-Pui Ho, City Univ. of Hong Kong (Hong Kong)
Wai Wah Lam, City Univ. of Hong Kong (Hong Kong)
Shu-Yuen Wu, City Univ. of Hong Kong (Hong Kong)
Michael Yang, City Univ. of Hong Kong (Hong Kong)


Published in SPIE Proceedings Vol. 4669:
Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications III
Nitin Sampat; John Canosa; Morley M. Blouke; John Canosa; Nitin Sampat, Editor(s)

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