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题名:
Nanofocusing beyond the near-field diffraction limit via plasmonic Fano resonance
作者: Song, Maowen1,2,3; Wang, Changtao1; Zhao, Zeyu1; Pu, Mingbo1; Liu, Ling1; Zhang, Wei1,3; Yu, Honglin2; Luo, Xiangang1
刊名: NANOSCALE
出版日期: 2016
卷号: 8, 期号:3, 页码:1635-1641
DOI: 10.1039/c5nr06504f
文章类型: Article
英文摘要: The past decade has witnessed a great deal of optical systems designed for exceeding the Abbe's diffraction limit. Unfortunately, a deep subwavelength spot is obtained at the price of extremely short focal length, which is indeed a near-field diffraction limit that could rarely go beyond in the nanofocusing device. One method to mitigate such a problem is to set up a rapid oscillatory electromagnetic field that converges at the prescribed focus. However, abrupt modulation of phase and amplitude within a small fraction of a wavelength seems to be the main obstacle in the visible regime, aggravated by loss and plasmonic features that come into function. In this paper, we propose a periodically repeated ring-disk complementary structure to break the near-field diffraction limit via plasmonic Fano resonance, originating from the interference between the complex hybrid plasmon resonance and the continuum of propagating waves through the silver film. This plasmonic Fano resonance introduces a pi phase jump in the adjacent channels and amplitude modulation to achieve radiationless electromagnetic interference. As a result, deep subwavelength spots as small as 0.0045 lambda(2) at 36 nm above the silver film have been numerically demonstrated. This plate holds promise for nanolithography, subdiffraction imaging and microscopy.
WOS标题词: Science & Technology ; Physical Sciences ; Technology
类目[WOS]: Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]: Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]: PERTURBED PERIODICITY ; FAR-FIELD ; INTERFERENCE ; METAMATERIAL ; LENS ; NANOSTRUCTURES ; AMPLIFICATION ; MICROSCOPY ; SUPERLENS ; METALS
收录类别: SCI
项目资助者: 973 Program of China(2013CBA01700) ; National Natural Science Funds(61138002)
语种: 英语
WOS记录号: WOS:000368040200047
ISSN号: 2040-3364
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3830
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 Nanofabricat & Microeng, Chengdu 610209, Peoples R China
2.Chongqing Univ, Key Lab Optoelect Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Song, Maowen,Wang, Changtao,Zhao, Zeyu,et al. Nanofocusing beyond the near-field diffraction limit via plasmonic Fano resonance[J]. NANOSCALE,2016,8(3):1635-1641.
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