Performance of admittance loci based design of plasmonic sensor at infrared wavelength

Abstract

A Kretschmann-Raether prism-based three-layer structure consisting of a prism, gold (Au) metal film, and dielectric sample has been investigated with the use of admittance loci method in attenuated total internal reflection mode. High index prism materials like silicon, chalcogenide (2S2G), and SF14 have been used to study their effect on surface plasmon resonance (SPR) sensing (at 1200-nm wavelength) in infrared region by corresponding admittance loci plots and also by SPR sensing curves. The performance of the sensor based on the choice of the prism material has been discussed with the help of sensitivity plots giving due importance to the dynamic range of the designed sensor. Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 05/16/2015 Terms of Use: http://spiedl.org/terms Optical Engineering 087112-2 August 2013/Vol. 52(8) Brahmachari and Ray: Performance of admittance loci based design of plasmonic sensor. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 05/16/2015 Terms of Use: http://spiedl.org/terms Optical Engineering 087112-3 August 2013/Vol. 52(8) Brahmachari and Ray: Performance of admittance loci based design of plasmonic sensor. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 05/16/2015 Terms of Use: http://spiedl.org/terms Optical Engineering 087112-4 August 2013/Vol. 52(8) Brahmachari and Ray: Performance of admittance loci based design of plasmonic sensor. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 05/16/2015 Terms of Use: http://spiedl.org/terms Optical Engineering 087112-6 August 2013/Vol. 52(8) Brahmachari and Ray: Performance of admittance loci based design of plasmonic sensor. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 05/16/2015 Terms of Use: http://spiedl.org/terms Kaushik Brahmachari received his BSc (honors) degree in electronics from

Performance evaluation of admittance loci based design of a ceramic prism based plasmonic structure

“…Admittance loci method has also been utilized to design plasmonic structure comprising of chalcogenide and silicon prism materials at infrared wavelength [9,10]. A work on design of a plasmonic structure consisting of Ag-Au bimetallic alloy film using admittance loci method has been reported [11].…”

Admittance Loci Based Design of a Plasmonic Structure Using Ag-Au Bimetallic Alloy Film

“…Surface plasmon excitation in infrared region involves the use of chalcogenide and silicon as coupling prism materials. Works on modeling of chalcogenide and silicon prism based surface plasmon resonance sensor for chemical sensing using infrared light have been reported earlier [5,6]. An experimental work on surface plasmon resonance using various geometrical configurations of metal-dielectric interface has also been reported [7].…”