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Enhancement of Surface Plasmon Resonance in Bimetallic Thin Films
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Enhancement of Surface Plasmon Resonance in Bimetallic Thin Films

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Abstract:

The current research work analysis the surface plasmons produced in the bimetallic thin films. The study aimed to understand the nature of surface plasmons produced from single metal thin film of copper and then to investigate the effect of addition of another metal thin layer above it. The research work was carried out via simulation analysis using Kretschmann-Raether configuration. Angular interrogation method and wavelength interrogation method was used to optimize the surface plasmon response from copper thin film in the nanometer range. On the optimized film of copper, another thin layer of gold and silver was added and nature of surface plasmons produced was analyzed. The results show better SPR response from Cu-Au and Cu-Ag bimetallic thin films than using single metal films. The reflected light intensity in the SPR response shows a drastic reduction from 15% to 5% for bimetallic Cu-Au thin film and to 2% for Cu-Ag thin film. The FWHM measurements also displays the reduction from 0.7724o for Cu monometallic film to 0.4319o for Cu-Au bimetallic films and 0.2460o for Cu-Ag bimetallic thin film. The results obtained from this analysis certainly benefits the optical sensor applications in medical and biological fields.

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Periodical:

Solid State Phenomena (Volume 392)

Pages:

11-18

DOI:

https://doi.org/10.4028/p-GaFZ8s

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Online since:

April 2026

Authors:

Kondankunnath Rejith Resmi*, Muhammed Muflih Karakkadan

Keywords:

Bimetallic Films, Kretschmann Configuration, Plasmons, Surface Plasmon Resonance, Thin Films

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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