期刊
OPTICS LETTERS
卷 41, 期 7, 页码 1336-1339出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.41.001336
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资金
- Welsh Government, UK, Ser Cymru National Research Network in Advanced Engineering and Materials [NRNF66, NRN113]
We designed a novel cylindrical metalens assembled by hexagonally arranged close-contact nanofibers. A near-field focusing nanojet with a full-width at half-maximum (FWHM) waist, 26.7% smaller than the Abbe diffraction limit for 532 nm wavelength light, is observed at the bottom of a 1600 nm diameter cylindrical metalens assembled by 160 nm diameter nanofibers irradiated by a plane wave from the top. Using differently sized nanofibers as building blocks to assemble the metalens, the waist size of the produced photonic nanojet in the near-field zone and the lateral resolution of the focus can be flexibly adjusted, simultaneously breaking the diffraction limit. (C) 2016 Optical Society of America
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