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| Citation key | Gkogkou2016 |
|---|---|
| Author | Dimitra Gkogkou and Timur Shaykhutdinov and Thomas W.H. Oates and Ulrich Gernert and Benjamin Schreiber and Stefan Facsko and Peter Hildebrandt and Inez M. Weidinger and Norbert Esser and Karsten Hinrichs |
| Pages | - |
| Year | 2016 |
| ISSN | 0169-4332 |
| DOI | http://dx.doi.org/10.1016/j.apsusc.2016.10.105 |
| Journal | Applied Surface Science |
| Abstract | Abstract The present investigation aims to study the optical response of anisotropic Ag nanoparticle arrays deposited on rippled silicon substrates by performing a qualitative comparison between experimental and theoretical results. Spectroscopic ellipsometry was used along with numerical calculations using finite-difference time-domain (FDTD) method and rigorous coupled wave analysis (RCWA) to reveal trends in the optical and geometrical properties of the nanoparticle array. Ellipsometric data show two resonances, in the orthogonal x and y directions, that originate from localized plasmon resonances as demonstrated by the calculated near-fields from \FDTD\ calculations. The far-field calculations by \RCWA\ point to decoupled resonances in x direction and possible coupling effects in y direction, corresponding to the short and long axis of the anisotropic nanoparticles, respectively. |
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