Abstract
It has been determined by density functional theory (DFT) simulations that the extracted permittivities of ultra-thin crystalline gold (Au) films exhibit large anisotropies which are not predicted by classical models or previous experimental determinations of the dielectric function. The optical scattering characteristics of a periodic array of Au discs are simulated with the DFT extracted permittivity and contrasted against those obtained with several commonly used Au permittivity models. It is demonstrated that the DFT-based transmittance spectra for these plasmonic metasurfaces lead to significantly redshifted results when compared to those predicted by standard Drude and Johnson-Christy permittivity models.
Original language | English (US) |
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Article number | 091106 |
Journal | Applied Physics Letters |
Volume | 103 |
Issue number | 9 |
DOIs | |
State | Published - Aug 26 2013 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)