Enhanced effect of local fields in subwavelength metallic series nanocavities from surface plasmon polaritons

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	Enhanced effect of local fields in subwavelength metallic series nanocavities from surface plasmon polaritons
	Hu, B ; Liu, J ; Gu, BY ; Di, S ; Sun, XD ; Wang, SQ
刊名	JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
	2007
卷号	24 期号:10 页码:A3
ISSN号	1084-7529
中文摘要	The enhancement and confinement characteristics of the local field in the two-dimensional (2D) subwavelength-size series cavities structure are investigated numerically by using the boundary integral method. The series cavities are built of two pieces of finite silver thin slabs with subwavelength corrugations on their inner boundaries, set in a face-to-face arrangement with a separating space, and the central part is a narrow channel (NC). We calculate the average amplitude of the local field in the NC as a function of the wavelength for exploring the influence of the structural parameters and demonstrate the amplitude distribution of the magnetic field in the structure and the cross-section distributions of the local field in the NC region along both the longitudinal axis direction and the transverse directions. The simulations show that the local field in the NC has significant enhancement, up to 2 orders of magnitude, of the incident light field, and the local light field is confined to a small region less than one fifth of the resonant wavelength in the longitudinal direction and one twentieth of the resonant wavelength in the lateral direction. Replacing the metallic material of the cavity walls with the semiconductor germanium leads to the complete disappearance of the enhancement of the local field. It is clearly shown that surface plasmon polaritons on the metal play a critical role for this enhancement phenomenon. The influences of various geometric parameters on the resonant wavelength and the peak value of the average amplitude of the local field are extensively investigated. (c) 2007 Optical Society of America.
收录类别	SCI
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/37341]
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	Hu, B,Liu, J,Gu, BY,et al. Enhanced effect of local fields in subwavelength metallic series nanocavities from surface plasmon polaritons[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION,2007,24(10):A3.
APA	Hu, B,Liu, J,Gu, BY,Di, S,Sun, XD,&Wang, SQ.(2007).Enhanced effect of local fields in subwavelength metallic series nanocavities from surface plasmon polaritons.JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION,24(10),A3.
MLA	Hu, B,et al."Enhanced effect of local fields in subwavelength metallic series nanocavities from surface plasmon polaritons".JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION 24.10(2007):A3.