pp. 1233-1239
S&M1415 Research Paper of Special Issue https://doi.org/10.18494/SAM.2017.1582 Published: September 6, 2017 Alloy Materials for Plasmonic Refractive Index Sensing [PDF] Yoshiaki Nishijima, Yoshikazu Hashimoto, Armandas Balčytis, Gediminas Seniutinas, and Saulius Juodkazis (Received February 14, 2017; Accepted May 17, 2017) Keywords: plasmon sensor, alloy materials, numerical calculations
We have numerically investigated the plasmonic refractive index sensor capabilities of Au–Ag– Cu alloys using experimentally determined permittivity values. Calculations were performed by simulating the typical Kretschmann configuration of surface plasmon polariton (SPR) excitation, as well as the localized surface plasmon resonance (LSPR) of nanoparticles. Sensor performance was evaluated as the response to changes in the refractive index of the surrounding environment as well as the attainable separation of peaks. By considering not only the peak shift, but also the spectral separation, SPR and LSPR sensors can be discussed on equal terms. In studies of both SPR and LSPR, specific alloy configurations were found to be superior to pure gold.
Corresponding author: Yoshiaki NishijimaCite this article Yoshiaki Nishijima, Yoshikazu Hashimoto, Armandas Balčytis, Gediminas Seniutinas, and Saulius Juodkazis, Alloy Materials for Plasmonic Refractive Index Sensing, Sens. Mater., Vol. 29, No. 9, 2017, p. 1233-1239. |