Multiple surface-plasmon-polariton (SPP) waves can be guided by the interface of a metal and a chiral sculptured
thin film (STF). It is possible to embed within the chiral STF a layer of silver nanoparticles as sites to bind
recognition molecules for sensing analytes of a certain kind. Chiral STFs were deposited on aluminum thin films.
5-nm-thick layers of silver nanoparticles were deposited in the chiral STF at different depths in different samples.
The samples were then deployed in the Turbadar–Kretschmann–Raether configuration to observe the effects the
silver-nanoparticle layer had on the multiple SPP-wave modes in relation to the depth. We concluded that the
silver-nanoparticle layer tends to shift the angular locations of the SPP-wave modes but does not necessarily
affect the location of the SPP-wave modes to an extent that would render the data uninterpretable.
Stephen E. Swiontek and Akhlesh Lakhtakia, "Influence of silver-nanoparticle layer in a chiral sculptured thin film for surface-multiplasmonic sensing," Proc. SPIE 9558, Nanostructured Thin Films VIII, 95580P (Presented at SPIE Nanoscience + Engineering: August 13, 2015; Published: 20 August 2015); https://doi.org/10.1117/12.2185842.
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