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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)43-51
Journal / PublicationProceedings of SPIE - The International Society for Optical Engineering
Volume4669
Publication statusPublished - 2002

Conference

TitleSensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications III
PlaceUnited States
CitySan Jose, CA
Period21 - 23 January 2002

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.

Research Area(s)

  • Interferometer, Optical sensors, Phase measurement, Surface plasmon resonance (SPR)

Citation Format(s)

Two-dimensional imaging sensor based on the measurement of differential phase related to surface plasmon resonance. / Ho, H. P.; Lam, W. W.; Wu, S. Y.; Yang, M.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 4669, 2002, p. 43-51.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal