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题名:
Shaping a Subwavelength Needle with Ultra-long Focal Length by Focusing Azimuthally Polarized Light
作者: Qin, Fei1; Huang, Kun1; Wu, Jianfeng2; Jiao, Jiao3; Luo, Xiangang3; Qiu, Chengwei1; Hong, Minghui1
刊名: SCIENTIFIC REPORTS
出版日期: 2015-05-06
卷号: 5
文章类型: Article
英文摘要: Flat optics, which could planarize and miniaturize the traditional optical elements, possesses the features of extremely low profile and high integration for advanced manipulation of light. Here we proposed and experimentally demonstrated a planar metalens to realize an ultra-long focal length of -240 lambda with a large depth of focus (DOF) of -12 lambda, under the illumination of azimuthally polarized beam with vortical phase at 633 nm. Equally important is that such a flat lens could stably keep a lateral subwavelength width of 0.42 lambda to 0.49 lambda along the needle-like focal region. It exhibits one-order improvement in the focal length compared to the traditional focal lengths of 20-30 lambda of flat lens, under the criterion of having subwavelength focusing spot. The ultra-long focal length ensures sufficient space for subsequent characterization behind the lens in practical industry setups, while subwavelength cross section and large DOF enable high resolution in transverse imaging and nanolithography and high tolerance in axial positioning in the meantime. Such planar metalens with those simultaneous advantages is prepared by laser pattern generator rather than focused ion beam, which makes the mass production possible.
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
关键词[WOS]: SUPER-OSCILLATORY LENS ; CYLINDRICAL-VECTOR BEAMS ; DIFFRACTION LIMIT ; STOKES PARAMETERS ; BINARY OPTICS ; PHASE ; WAVELENGTHS ; FIELDS
收录类别: SCI
语种: 英语
WOS记录号: WOS:000354089500001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/2558
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.Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore
2.Natl Univ Singapore, SSLS, Singapore 117603, Singapore
3.Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Nanofabricat & Microeng, Chengdu 610209, Peoples R China

Recommended Citation:
Qin, Fei,Huang, Kun,Wu, Jianfeng,et al. Shaping a Subwavelength Needle with Ultra-long Focal Length by Focusing Azimuthally Polarized Light[J]. SCIENTIFIC REPORTS,2015,5.
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