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Here, we perform a theoretical investigation of the impact of film thickness and incident angle on the surface plasmon resonance spectra for annealed and postannealed Ga-doped ZnO (ZnO:Ga) in a 3-phase Kretschmann configuration. A detailed comparative study has been performed to determine the optimum configuration to be utilized for sensing applications. Though both films are found to support plasmonic excitation for thickness below 200 nm, detection accuracy and sensitivity calculations from the resonance plots simulated in the MATLAB environment reveal that the preference of one over the other should be in accordance with the concerned application. [ABSTRACT FROM AUTHOR]

Metallic film thickness optimization in mono- and bimetallic plasmonic structures has been carried out in order to determine the correct device parameters. Different resonance parameters, such as reflectivity, phase, field enhancement, and the complex amplitude reflectance Argand diagram (CARAD), have been investigated for the proposed optimization procedure. Comparison of mono- and bimetallic plasmonic structures has been carried out in the context of these resonance parameters with simultaneous angular and spectral interrogation. Differential phase analysis has also been performed and its application to sensing has been discussed along with a proposed interferometric set-up. [ABSTRACT FROM AUTHOR]