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  • Title: FDTD simulations of localization and enhancements on fractal plasmonics nanostructures.
    Author: Buil S, Laverdant J, Berini B, Maso P, Hermier JP, Quélin X.
    Journal: Opt Express; 2012 May 21; 20(11):11968-75. PubMed ID: 22714182.
    Abstract:
    A parallelized 3D FDTD (Finite-Difference Time-Domain) solver has been used to study the near-field electromagnetic intensity upon plasmonics nanostructures. The studied structures are obtained from AFM (Atomic Force Microscopy) topography measured on real disordered gold layers deposited by thermal evaporation under ultra-high vacuum. The simulation results obtained with these 3D metallic nanostructures are in good agreement with previous experimental results: the localization of the electromagnetic intensity in subwavelength areas ("hot spots") is demonstrated; the spectral and polarization dependences of the position of these "hot spots" are also satisfactory; the enhancement factors obtained are realistic compared to the experimental ones. These results could be useful to further our understanding of the electromagnetic behavior of random metal layers.
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