Open AccessFDTD simulations of localization and enhancements on fractal plasmonics nanostructures
Author(s) -
Stéphanie Buil,
Julien Laverdant,
Bruno Bérini,
Pierre Maso,
Jean-Pierre Hermier,
Xavier Quélin
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.011968
Subject(s) - finite difference time domain method , plasmon , optics , polarization (electrochemistry) , materials science , nanostructure , electromagnetic field , fractal , near and far field , thermal , computational physics , physics , nanotechnology , chemistry , quantum mechanics , mathematical analysis , mathematics , meteorology
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.