期刊
NANOMATERIALS
卷 9, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/nano9091227
关键词
surface polaritons; planar waveguide; mode coupling; optical sensors
类别
资金
- Ministry of Education, Youth and Sports of the Czech Republic: by the National Program of Sustainability (NPU II) project IT4Innovations Excellence in Science-LQ1602
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.
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