期刊
JOURNAL OF APPLIED PHYSICS
卷 113, 期 15, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4801919
关键词
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资金
- China Scholarship Council (CSC)
- AiF Projekt GmbH
- Engineering of Advanced Materials excellence cluster (EAM)
- University of Erlangen-Nuremberg and the Erlangen Graduate School of Advanced Optical Technologies (SAOT) from the German National Science Foundation (DFG), within the framework of the German excellence initiative
The interaction between light and silver nanowires (Ag NWs) in a thin film is simulated by solving Maxwell's equations numerically. Time-harmonic inverse iterative method is implemented to overcome the problem of negative permittivity of silver, which makes the classical finite-difference time-domain iteration unstable. The method is validated by showing the correspondence between the plasmonic resonance of an Ag NW from a two dimensional simulation and the analytical solution. In agreement with previous experimental studies, the simulation results show that the transmissivity of the Ag NW films is higher than expected from the geometric aperture. The cause of this phenomenon is studied using TE/TM modes analysis for Ag NW films with different surface coverage of parallel-aligned Ag NWs. Furthermore, 3D simulation of Ag NW films with randomly arranged Ag NWs is performed by parallel computation on high performance computers. A binder layer is taken into account for a preliminary comparison between the simulation and experimental results. The agreements and disagreements between the simulated and measured spectra are discussed. (C) 2013 AIP Publishing LLC
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