Role of waveguide resonance in coupled plasmonic structures using bimetallic nanofilms

Mahua Bera; Mina Ray

doi:10.1117/1.OE.51.10.103801

4 October 2012 Role of waveguide resonance in coupled plasmonic structures using bimetallic nanofilms

Mahua Bera, Mina Ray

Author Affiliations +

Optical Engineering, Vol. 51, Issue 10, 103801 (October 2012). https://doi.org/10.1117/1.OE.51.10.103801

Abstract

We theoretically analyze waveguide coupled surface plasmon resonance structure to investigate the coupling phenomenon between waveguide resonance and plasmonic resonance. Variations of types of metals as well as changes of thickness of the waveguide layer produce some interesting phenomena in the context of coupled plasmonics. Different modes that are generated are found to have dual contributions of waveguide and plasmonic effects. Field enhancement and reflectance contour plots with simultaneous angular and wavelength interrogation give some insight into the effect of waveguide resonance on the performance of nanoplasmonic structure. Figure of merit calculations and comparison of angular and wavelength differential curves of different nanoplasmonic structures can be used to determine the right candidature as regarding the better sensing performance compared to conventional SPR based sensor. Moreover, the important role played by the thickness of the waveguide layer is also established with supporting simulations.

Citation Download Citation

Mahua Bera and Mina Ray "Role of waveguide resonance in coupled plasmonic structures using bimetallic nanofilms," Optical Engineering 51(10), 103801 (4 October 2012). https://doi.org/10.1117/1.OE.51.10.103801

Published: 4 October 2012

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