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. 2017 Nov 3;7:14611. doi: 10.1038/s41598-017-14449-y

Figure 4.

Figure 4

Optical force exerted on a 100 nm (radius) low-refractive-index dielectric nanoparticle along x-axis the focal field with topological charge of (a) 0 and (b) 2. Distribution of the corresponding potential depth of a low-refractive-index nanoparticle along x-axis for focal field with topological charge of (c) 0 and (d) 2.