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Published on: November 23, 2015
Self-referenced spectroscopy using plasmon waveguide resonance biosensor
Farshid Bahrami1, Mathieu Maisonneuve2, Michel Meunier2
1Department of Electrical and Computer Engineering, University of Toronto, Ontario, M5S 3G4, Canada.
Abstract:
A plasmon waveguide resonance (PWR) sensor is designed, fabricated, and tested for self-referenced biosensing. The PWR sensor is able to support two different polarizations, TM and TE. The TM polarization has a large sensitivity to variations in the background refractive index while the TE polarization is more sensitive to the surface properties. The ability of the PWR sensor to simultaneously operate in both TM and TE modes is used to decouple the background index variations (bulk effects) from the changes in adlayer thickness (surface effects) via multimode spectroscopy. To benchmark the performance of the PWR, a conventional surface plasmon resonance (SPR) sensor is fabricated and tested under the same conditions.

