Modelling and characterisation of surface plasmon based sensors for the detection of E. coli. (English) Zbl 1170.78346
Summary: 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.
MSC:
| 78A40 | Waves and radiation in optics and electromagnetic theory |
| 81V80 | Quantum optics |
| 81V45 | Atomic physics |
| 78M10 | Finite element, Galerkin and related methods applied to problems in optics and electromagnetic theory |
Keywords:
biosensor; E. coli; finite element method; surface plasmon resonance; fibre optics; full-vectorial H-field formulationReferences:
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