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题名:
Near-field behavior of zone-plate-like plasmonic nanostructures
作者: Fu, Yongqi1; Zhou, Wei2; Lim, Lennie Enk Ng2
刊名: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
出版日期: 2008
卷号: 25, 期号:1, 页码:238-249
文章类型: Article
英文摘要: The near-field behavior of a new plasmonic structure, the plasmonic micro-zone-plate (PMZP), is presented. The PMZP can realize superfocusing at a working distance on the micrometer scale and a resolving power beyond the diffraction limit. Compared with conventional Fresnel zone plates (CFZPs), its unique characteristics of a significantly elongated depth of focus (DOF) and focal length will make autofocusing easier for the relevant optical systems. These characteristics imply that it is possible to realize a free feedback control system for autofocusing systems in which probe scanning is performed with a constant working distance from the probe to the sample surface, provided that the flatness variation of the sample substrate is within the DOE Moreover, unlike the CFZPs, there is no series of focal points appearing for beam propagation in the near-field region with a propagation distance ranging from lambda to 8 lambda or even longer. In addition, transmission properties in the near-field region are investigated by means of a computational simulation based on a finite-difference time-domain numerical algorithm. Peak transmission wavelength shifts were observed while the metal film thickness was changed. Focusing characteristics were analyzed for different numerical apertures of the PMZPs. (C) 2007 Optical Society of America.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: TRANSMISSION ; DIFFRACTION ; POLARITONS ; APERTURE ; ARRAYS ; SLITS ; LIGHT
收录类别: SCI
语种: 英语
WOS记录号: WOS:000252853700028
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3614
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Microfabricat, Chengdu 610209, Peoples R China
2.Nanyang Technol Univ, Precis Engn & Nanotechnol Ctr, Sch Mech & Aerosp Engn, Singapore 639798, Singapore

Recommended Citation:
Fu, Yongqi,Zhou, Wei,Lim, Lennie Enk Ng. Near-field behavior of zone-plate-like plasmonic nanostructures[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION,2008,25(1):238-249.
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