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Comparison between discrete dipole approximation and other modelling methods for the plasmonic response of gold nanospheres |
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| Authors: | V L Y Loke G M Huda E U Donev V Schmidt J T Hastings M Pinar Mengüç T Wriedt |
| Institution: | 1. Mechanische Verfahrenstechnik, University of Bremen, Bremen, Germany 3. School of Mathematics and Physics, The University of Queensland, Queensland, Australia 2. Department of Electrical and Computer Engineering, University of Kentucky, Lexington, KY, USA 4. School of Engineering, ?zye?in University, ?ekmek?y, Istanbul, Turkey 5. Institut für Werkstofftechnik, University of Bremen, Bremen, Germany |
| Abstract: | We investigate the plasmonic response of gold nanospheres calculated using discrete dipole approximation validated against the results from other discretization methods, namely the finite-difference time-domain method and the finite-element methods. Comparisons are also made with calculations from analytical methods such as the Mie solution and the null-field method with discrete sources. We consider the nanoparticle interacting with the incident field both in free space and sitting on a planar substrate. In the latter case, discrete dipole approximation with surface interaction is used; this includes the interaction with the ‘image dipoles’ using Sommerfeld integration. |
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