Srivastava T.Jha R.Das R.2025-02-17201133http://dx.doi.org/10.1109/LPT.2011.2162828https://idr.iitbbs.ac.in/handle/2008/122We propose a high-performance bimetallic surface plasmon resonance (SPR) sensor based on periodic-multilayer waveguide and analyze its performance with respect to SPR active metals, such as gold (Au) and aluminum (Al). We found that an ultra thin (? 3 nm) layer of gold (Au) over aluminum (Al) protects aluminum (Al) from oxidation and exhibits better sensor performance. Using couple-mode theory, we show that the sensitivity and detection accuracy could be appropriately tailored for bimetallic (Au+Al) configuration. � 2011 IEEE.enPhotonic bandgapplasmonicssensorArticle