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. 2017 Aug 25;6(8):e17032. doi: 10.1038/lsa.2017.32

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Copyright © 2017 The Author(s)

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/

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The 4 × 4 × 4 3D super-resolution longitudinal MS array induced by the optimized MPFs acting on the left-handed circularly polarized BG beams in the 4π focusing geometry. (a) Phase pattern of the MPFs with G=S=T=4 and a_g=b_s=c_t=8λ. (b) 3D iso-magnetization surface of the MS array with M=M_max/2. (c and d) Contour plots of the total magnetization field in the xy and rz planes. (e) Relevant magnetization cross-section profiles in c and d, respectively (black and red lines are along the x and z axes, respectively. The green line represents the x axis cross-section of the magnetization pattern of a single focal spot without the use of MPFs. (f) Enlarged individual spot inside the MS array and its polarization distribution in the rz plane.