Influence of chalcogenide glass on surface plasmon resonance based sensor design in near infrared region using admittance loci method

A numerical simulation study based on the use of admittance loci method in design of surface plasmon resonance (SPR) based sensor using chalcogenide and other commonly used glasses has been reported in this paper. A simple Kretschmann-Raether prism-based multilayer structure consisting of a glass prism, Gold (Au) metal film and water (sensing layer) has been investigated with the use of admittance loci method in Attenuated Total Internal Reflection (ATIR) mode. Infrared transmission properties of chalcogenide material along with high refractive index offer certain advantages for sensing applications. Admittance loci plots as well as resonance curves using chalcogenide glass has been compared with those for other commonly used glasses in order to study their effect on SPR sensing in near infrared (NIR) wavelength region.