Numerical simulation of light propagation in silver nanowire films using time-harmonic inverse iterative method

被引：20

作者：

Yan, Shuai ^{[1
,2
]}

Krantz, Johannes ^{[3
]}

Forberich, Karen ^{[3
]}

Pflaum, Christoph ^{[1
,2
]}

Brabec, Christoph J. ^{[3
]}

机构：

[1] Univ Erlangen Nurnberg, Erlangen Grad Sch Adv Opt Technol SAOT, D-91054 Erlangen, Germany

[2] Univ Erlangen Nurnberg, Dept Comp Sci, LSS, D-91058 Erlangen, Germany

[3] Univ Erlangen Nurnberg, Dept Mat Sci, I MEET, D-91058 Erlangen, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 15期

基金：

美国国家科学基金会;

关键词：

PERMITTIVITY; MEDIA;

D O I：

10.1063/1.4801919

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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

引用

页数：6

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