Admittance loci based design of a nanobioplasmonic sensor and its performance analysis

A prism coupler type nanobioplasmonic device consisting of a prism, gold (Au) metal film and human skin tissue as a biosample has been investigated with the use of admittance loci method in angular interrogation mode. High index prism materials namely chalcogenide (2S2G) and silicon have been used to study their effect on surface plasmon biosensing. The performance of the nanobioplasmonic device has been discussed and validated by the theoretical analysis based on resonance curves as well as admittance loci plots.