Published January 1, 2014
| Version v1
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Comparison between discrete dipole approximation and other modelling methods for the plasmonic response of gold nanospheres
Creators
- 1. Univ Kentucky, Dept Elect & Comp Engn, Lexington, KY USA
- 2. Univ Bremen, D-28359 Bremen, Germany
- 3. Ozyegin Univ Cekmekoy, Sch Engn, Istanbul, Turkey
- 4. Univ Bremen, Inst Werkstofftech, D-28359 Bremen, Germany
Description
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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