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Design of Plasmonic-Waveguiding Structures for Sensor Applications

by Jaroslav Vlček 1,2,*,†, Jaromír Pištora 1,3,† and Michal Lesňák 1,†
1
Nanotechnology Centre, VŠB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic
2
Department of Mathematics and Descriptive Geometry, Faculty of Mechanical Engineering, VŠB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic
3
IT4Innovations, VŠB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic
*
Author to whom correspondence should be addressed.
Current Address: 17. listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic.
Nanomaterials 2019, 9(9), 1227; https://doi.org/10.3390/nano9091227
Received: 30 July 2019 / Revised: 20 August 2019 / Accepted: 26 August 2019 / Published: 29 August 2019
Surface plasmon resonance has become a widely accepted optical technique for studying biological and chemical interactions. Among others, detecting small changes in analyte concentration in complex solutions remains challenging, e.g., because of the need of distinguishing the interaction of interest from other effects. In our model study, the resolution ability of plasmonic sensing element was enhanced by two ways. Besides an implementation of metal-insulator-metal (MIM) plasmonic nanostructure, we suggest concatenation with waveguiding substructure to achieve mutual coupling of surface plasmon polariton (SPP) with an optical waveguiding mode. The dependence of coupling conditions on the multilayer parameters was analyzed to obtain optimal field intensity enhancement. View Full-Text
Keywords: surface polaritons; planar waveguide; mode coupling; optical sensors surface polaritons; planar waveguide; mode coupling; optical sensors
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Vlček, J.; Pištora, J.; Lesňák, M. Design of Plasmonic-Waveguiding Structures for Sensor Applications. Nanomaterials 2019, 9, 1227.

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