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Shaping a Subwavelength Needle with Ultra-long Focal Length by Focusing Azimuthally Polarized Light
Qin, Fei; Huang, Kun; Wu, Jianfeng; Jiao, Jiao; Luo, Xiangang; Qiu, Chengwei; Hong, Minghui
Source PublicationSCIENTIFIC REPORTS
Volume5Pages:9977
2015
Language英语
ISSN2045-2322
DOI10.1038/srep09977
Indexed BySCI
WOS IDWOS:000354089500001
Subtype期刊论文
AbstractFlat 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.; 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.
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Cited Times:118[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/6885
Collection微细加工光学技术国家重点实验室(开放室)
Recommended Citation
GB/T 7714
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,2015,5:9977.
APA Qin, Fei.,Huang, Kun.,Wu, Jianfeng.,Jiao, Jiao.,Luo, Xiangang.,...&Hong, Minghui.(2015).Shaping a Subwavelength Needle with Ultra-long Focal Length by Focusing Azimuthally Polarized Light.SCIENTIFIC REPORTS,5,9977.
MLA Qin, Fei,et al."Shaping a Subwavelength Needle with Ultra-long Focal Length by Focusing Azimuthally Polarized Light".SCIENTIFIC REPORTS 5(2015):9977.
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