Controllable Excitation of Surface Plasmons in End-to-Trunk Coupled Silver Nanowire Structures

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Controllable Excitation of Surface Plasmons in End-to-Trunk Coupled Silver Nanowire Structures
	Zhu, Y ; Wei, H ; Yang, PF ; Xu, HX
刊名	CHINESE PHYSICS LETTERS
	2012
卷号	29 期号:7
关键词	ENHANCED RAMAN-SCATTERING RESONANCE SENSORS PROPAGATION LIGHT
ISSN号	0256-307X
通讯作者	Xu, HX: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, POB 603-146, Beijing 100190, Peoples R China.
中文摘要	In branched nanowire structures, the controllable excitation of surface plasmons is investigated by both experiments and simulations. By focusing the excitation light at the junction between the main wire and the branch wire, surface plasmons can be selectively launched to propagate to different output terminals, depending on the polarization of the excitation light. The parameters influencing the plasmon excitation and thus emission behavior are investigated, including the branch angle, the position of the branch and the nanowire radius. The different polarization dependence of the output light is determined by the surface plasmon modes selectively excited in the junction through end-excitation or/and gap-excitation manners. For the branch wire, when the branch angle is small, the end-excitation is dominant, which makes the branched wire behave like an individual nanowire. With the increase of the branch angle, the coupling between the branch wire end and the primary wire trunk is increased, which influences the plasmon excitation in the branch wire as evidenced by the rotation of the polarization angle for maximum output. For the primary wire, the SP excitation is dependent on the branch angle, position of the junction along the primary wire, and the radii of the nanowires. The results may be important for the design of a controllable surface plasmon launcher, one of the functional components in surface-plasmon-based nanophotonic circuits.
收录类别	SCI
资助信息	National Natural Science Foundation of China [10625418, 10874233, 11004237, 11134013]; National Basic Research Program of China [2009CB930700]; Chinese Academy of Sciences [KJCX2-EW-W04]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/35108]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhu, Y,Wei, H,Yang, PF,et al. Controllable Excitation of Surface Plasmons in End-to-Trunk Coupled Silver Nanowire Structures[J]. CHINESE PHYSICS LETTERS,2012,29(7).
APA	Zhu, Y,Wei, H,Yang, PF,&Xu, HX.(2012).Controllable Excitation of Surface Plasmons in End-to-Trunk Coupled Silver Nanowire Structures.CHINESE PHYSICS LETTERS,29(7).
MLA	Zhu, Y,et al."Controllable Excitation of Surface Plasmons in End-to-Trunk Coupled Silver Nanowire Structures".CHINESE PHYSICS LETTERS 29.7(2012).