Surface Plasmon Resonance Photonic Biosensors
Date: 12 December 2007 (Wednesday)
Time: 12:30pm - 1:30pm
Venue: 126, C N Yang Reading Room, Science Centre North Block
Speaker: Prof. HO Ho Pui Aaron, Department of Electronic Engineering
Abstract: Surface plasmon resonance (SPR) has been known to be an effective approach for label-free detection of binding between bio-molecular species. Several companies have been very successful in turning SPR into commercial equipment products for the R&D community. With the recent expansion of nanophotonics and bio-related research activities, we have been exploring new ideas in SPR photonics biosensors. We shall first report a highly sensitive surface plasmon resonance (SPR) biosensor design based on the measurement of differential phase between the s- and p-polarization. Unlike conventional SPR systems, in which the SPR data is measured through varying the angle of incidence, our phase-sensitive measurement approach does not require any change in angle of incidence. This makes this technique well suited for imaging applications, which also leads to parallel sensing of multiple analytes. Within this presentation, several novel ideas on achieving very high resolution in phase detection will be addressed.
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