Modelling and characterisation of surface plasmon based sensors for the detection of E. coli |
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| Authors: | M. Rajarajan C. Themistos B.M.A. Rahman K.T.V. Grattan J. Homola |
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| Affiliation: | 1. Biophotonics Group , City University , London, UK;2. Institute of Radio Engineering and Electronics , Czech Republic |
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| Abstract: | The finite element method based on the full-vectorial H-field formulation incorporating the perturbation techniques has been employed to calculate the complex propagation characteristics, the formation of the coupled supermodes, and power fraction in the different regions, modal loss, differential loss and coupling length. The influence of the outer medium refractive index on the inner and outer surface plasmon modes (SPR) is investigated to achieve the best coupling and sensitivity. Finally the SRP fibre optic sensor design is numerically optimised for the maximum field penetration in the outer medium |
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| Keywords: | biosensor E. coli finite element method surface plasmon resonance fibre optics full-vectorial H-field formulation |
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