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- W3048249733 abstract "Abstract Besides aspect ratio AR and excitation wavelength λ, material composition is also key parameter determining figure of merit (FOM) of individual Au x Ag 1 − x ( x = 0 , 0.2, 0.3, 0.5, 0.7, 0.8,1.0) alloy nanobars. In this paper, the corresponding x dependent refractive-index sensitivity factor (S) and FOM responses were numerically investigated as functions of AR and λ by discrete dipole approximation. It demonstrates that S increases nonlinearly/linearly with λ LSPR / A R for all x concerned while FOM achieves x dependent optimum at optimized λ LSPR and AR. With x decreasing, S, FOM and optimal FOM are revealed to increase. The obtained S and FOM responses are analytically explained well by alloy dielectric response under dipolar LSPR condition. The surrounding medium effect on S and FOM response of optimized Au x Ag 1 − x nanobar is discussed as well. The present work provides significant guideline for future Au/Ag based applications in plasmonic sensing and detection." @default.
- W3048249733 created "2020-08-13" @default.
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- W3048249733 date "2020-10-01" @default.
- W3048249733 modified "2023-10-15" @default.
- W3048249733 title "Optimal aspect ratio and excitation spectral region of individual Au Ag1− alloy nanobars for plasmonic sensing" @default.
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- W3048249733 doi "https://doi.org/10.1016/j.physleta.2020.126785" @default.
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