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题名:
Ultrabroadband superoscillatory lens composed by plasmonic metasurfaces for subdiffraction light focusing
作者: Tang, Dongliang; Wang, Changtao; Zhao, Zeyu; Wang, Yanqin; Pu, Mingbo; Li, Xiong; Gao, Ping; Luo, Xiangang
刊名: Laser and Photonics Reviews
出版日期: 2015
卷号: 9, 期号:6, 页码:713-719
学科分类: Cutoff frequency - Digital storage - Infrared devices - Lenses - Optical data storage - Optical resolving power - Plasmons
DOI: 10.1002/lpor.201500182
通讯作者: Luo, Xiangang (lxg@ioe.ac.cn)
文章类型: 期刊论文
中文摘要: Conventional optics is diffraction limited due to the cutoff of spatial frequency components, and evanescent waves allow subdiffraction optics at the cost of complex near-field manipulation. Recently, optical superoscillatory phenomena were employed to realize superresolution lenses in the far field, but suffering from very narrow working wavelength band due to the fragility of the superoscillatory light field. Here, an ultrabroadband superoscillatory lens (UBSOL) is proposed and realized by utilizing the metasurface-assisted law of refraction and reflection in arrayed nanorectangular apertures with variant orientations. The ultrabroadband feature mainly arises from the nearly dispersionless phase profile of transmitted light through the UBSOL for opposite circulation polarization with respect to the incident light. It is demonstrated in experiments that subdiffraction light focusing behavior holds well with nearly unchanged focal patterns for wavelengths spanning across visible and near-infrared light. This method is believed to find promising applications in superresolution microscopes or telescopes, high-density optical data storage, etc. Ultrabroadband optical superoscillatory lens and subdiffraction focusing in the far field are proposed and demonstrated with a plasmonic metasurface. The ultrabroadband feature mainly arises from the dispersionless phase profile across visible and near-infrared light wavelengths. This method is believed to provide a promising access to broadband far-field optics beyond the Abbe diffraction limit, such as microscope and telescope systems. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA.
英文摘要: Conventional optics is diffraction limited due to the cutoff of spatial frequency components, and evanescent waves allow subdiffraction optics at the cost of complex near-field manipulation. Recently, optical superoscillatory phenomena were employed to realize superresolution lenses in the far field, but suffering from very narrow working wavelength band due to the fragility of the superoscillatory light field. Here, an ultrabroadband superoscillatory lens (UBSOL) is proposed and realized by utilizing the metasurface-assisted law of refraction and reflection in arrayed nanorectangular apertures with variant orientations. The ultrabroadband feature mainly arises from the nearly dispersionless phase profile of transmitted light through the UBSOL for opposite circulation polarization with respect to the incident light. It is demonstrated in experiments that subdiffraction light focusing behavior holds well with nearly unchanged focal patterns for wavelengths spanning across visible and near-infrared light. This method is believed to find promising applications in superresolution microscopes or telescopes, high-density optical data storage, etc. Ultrabroadband optical superoscillatory lens and subdiffraction focusing in the far field are proposed and demonstrated with a plasmonic metasurface. The ultrabroadband feature mainly arises from the dispersionless phase profile across visible and near-infrared light wavelengths. This method is believed to provide a promising access to broadband far-field optics beyond the Abbe diffraction limit, such as microscope and telescope systems. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA.
收录类别: SCI ; Ei
项目资助者: 973 Program of China [2013CBA01700] ; Chinese Nature Science Grant [61138002, 61177013]
语种: 英语
WOS记录号: WOS:000368255200014
ISSN号: 1863-8880
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/6876
Appears in Collections:微细加工光学技术国家重点实验室(开放室)_期刊论文

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作者单位: State Key Lab of Optical Technologies on Nano-fabrication and Micro-engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Chengdu, China

Recommended Citation:
Tang, Dongliang,Wang, Changtao,Zhao, Zeyu,et al. Ultrabroadband superoscillatory lens composed by plasmonic metasurfaces for subdiffraction light focusing[J]. Laser and Photonics Reviews,2015,9(6):713-719.
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