Goos–Hänchen and Imbert–Fedorov shifts in a two-dimensional array of gold nanoparticles

Maryam Zoghi

doi:10.1117/1.JNP.12.016021

15 March 2018 Goos–Hänchen and Imbert–Fedorov shifts in a two-dimensional array of gold nanoparticles

Maryam Zoghi

Author Affiliations +

Journal of Nanophotonics, Vol. 12, Issue 1, 016021 (March 2018). https://doi.org/10.1117/1.JNP.12.016021

Abstract

Using an oblique linearly polarized laser beam, Goos–Hänchen (GH) and Imbert–Fedorov (IF) reflection shifts of a two-dimensional array of gold nanoparticles (NPs) on water substrate are investigated within the framework of a theoretical model. The dependences of spatial ( Δ ) and angular ( Θ ) shifts on the angle of radiation, the polarity of light, the size, and concentration of particles have been studied in detail. It is shown that a grazing p-wave light yields to the highest negative amount of GH shifts, while a 45-deg polarization that radiates at 45 deg would maximize IF shifts. The deviations are sensitive to the particle size linearly and decrease using larger NPs except in the angular out-of-plane shift Θ_IF, which has a critical point where its sign and trend change. The curves of Δ_GH, Θ_GH, and Θ_IF for various lattice constant exhibit peaks for a specific arrangement that moves toward smaller values as the particle size increases. On the other hand, Δ_IF always has an additive behavior. Accurate monitoring of these parameters may serve as a precise method to determine thickness and aggregation of nanostructured films.

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Maryam Zoghi "Goos–Hänchen and Imbert–Fedorov shifts in a two-dimensional array of gold nanoparticles," Journal of Nanophotonics 12(1), 016021 (15 March 2018). https://doi.org/10.1117/1.JNP.12.016021

Received: 4 January 2018; Accepted: 20 February 2018; Published: 15 March 2018

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