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政大機構典藏 > 理學院 > 應用物理研究所 > 期刊論文 > Item 140.119/62212

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Title:	Dispersion relation, propagation length and mode conversion of surface plasmon polaritons in silver double-nanowire systems
Authors:	郭光宇 Sun, Shulin;Chen, Hung-Ting;Zheng, Wei-Jin;Guo, Guang-Yu
Contributors:	應物所
Date:	2013.06
Issue Date:	2013-12-06 14:29:32 (UTC+8)
Abstract:	We study the surface plasmon modes in a silver double-nanowire system by employing the eigenmode analysis approach based on the finite element method. Calculated dispersion relations, surface charge distributions, field patterns and propagation lengths of ten lowest energy plasmon modes in the system are presented. These ten modes are categorized into three groups because they are found to originate from the monopole-monopole, dipole-dipole and quadrupole-quadrupole hybridizations between the two wires, respectively. Interestingly, in addition to the well studied gap mode (mode 1), the other mode from group 1 which is a symmetrically coupled charge mode (mode 2) is found to have a larger group velocity and a longer propagation length than mode 1, suggesting mode 2 to be another potential signal transporter for plasmonic circuits. Scenarios to efficiently excite (inject) group 1 modes in the twowire system and also to convert mode 2 (mode 1) to mode 1 (mode 2) are demonstrated by numerical simulations.
Relation:	Optics Express, 21(12), 14591 - 14605
Data Type:	article
DOI 連結:	http://dx.doi.org/10.1364/OE.21.014591
DOI:	10.1364/OE.21.014591
Appears in Collections:	[應用物理研究所 ] 期刊論文

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