### Surface plasmon resonance sensor based on bimetallic alloys gratingSurface plasmon resonance sensor based on bimetallic alloys grating

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 Author Dhibi, A. ♦ Sassi, I. ♦ Oumezzine, M. Source SpringerLink Content type Text Publisher Springer India File Format PDF Copyright Year ©2015 Language English
 Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics Subject Keyword Surface plasmon resonance ♦ Optical sensor ♦ Bimetallic alloy grating ♦ Physics ♦ Astrophysics and Astroparticles Abstract A surface plasmon resonance sensor based on triangular alloys grating with high performance is proposed. The grating consists of homogeneous binary gold alloys of formula Au$_{ x }$M$_{1−x }$, where M is silver, platinum and palladium. It is observed that the two metals, platinum and palladium, have an almost identical surface plasmon resonance in gold alloys irrespective of composition x. The resonance sensitivity becomes highly dependent on gold composition. The composition of gold around 0.1 is found to have a higher sensitivity. 0.1 composition of Au and 0.9 of Ag gives a high sensitivity. Consequently, the quality of the sensor is improved. Numerical simulations show that the angular sensitivity of the sensor reaches 100°/RIU and the full width at half maximum of the resonant dip is only 1.2°. Moreover, the sensor has not only a high sensitivity and a high resolution, but also a good linearity. ISSN 09731458 Age Range 18 to 22 years ♦ above 22 year Educational Use Research Education Level UG and PG Learning Resource Type Article Publisher Date 2015-06-20 Publisher Place New Delhi e-ISSN 09749845 Journal Indian Journal of Physics Volume Number 90 Issue Number 1 Page Count 6 Starting Page 125 Ending Page 130