Shaping a Subwavelength Needle with Ultra-long Focal Length by Focusing Azimuthally Polarized Light

CORC > 光电技术研究所 > 中国科学院光电技术研究所 > 微细加工光学技术国家重点实验室（开放室）

	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
刊名	SCIENTIFIC REPORTS
	2015
卷号	5 页码:9977
ISSN号	2045-2322
中文摘要	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.
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.
学科主题	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
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/6885]
专题	光电技术研究所_微细加工光学技术国家重点实验室（开放室）
推荐引用方式 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.