Toscano, Giuseppe and Straubel, Jakob and Kwiatkowski, Alexander and Rockstuhl, Carsten and Evers, Ferdinand and Xu, Hongxing and Mortensen, N. Asger and Wubs, Martijn (2015) Resonance shifts and spill-out effects in self-consistent hydrodynamic nanoplasmonics. NATURE COMMUNICATIONS, 6: 7132. ISSN 2041-1723,
Full text not available from this repository. (Request a copy)Abstract
The standard hydrodynamic Drude model with hard-wall boundary conditions can give accurate quantitative predictions for the optical response of noble-metal nanoparticles. However, it is less accurate for other metallic nanosystems, where surface effects due to electron density spill-out in free space cannot be neglected. Here we address the fundamental question whether the description of surface effects in plasmonics necessarily requires a fully quantum-mechanical ab initio approach. We present a self-consistent hydrodynamic model (SC-HDM), where both the ground state and the excited state properties of an inhomogeneous electron gas can be determined. With this method we are able to explain the size-dependent surface resonance shifts of Na and Ag nanowires and nanospheres. The results we obtain are in good agreement with experiments and more advanced quantum methods. The SC-HDM gives accurate results with modest computational effort, and can be applied to arbitrary nanoplasmonic systems of much larger sizes than accessible with ab initio methods.
Item Type: | Article |
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Uncontrolled Keywords: | SURFACE-PLASMON DISPERSION; DENSITY-FUNCTIONAL THEORY; METAL-SURFACES; KINETIC-ENERGY; OPTICAL-RESPONSE; WORK FUNCTION; NONLOCAL RESPONSE; NANOWIRE DIMERS; ELECTRON-GAS; MODEL; |
Subjects: | 500 Science > 530 Physics |
Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Ferdinand Evers |
Depositing User: | Dr. Gernot Deinzer |
Date Deposited: | 18 Jul 2019 10:49 |
Last Modified: | 18 Jul 2019 10:49 |
URI: | https://pred.uni-regensburg.de/id/eprint/5543 |
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