909174.fig.003a
(a)
909174.fig.003b
(b)
Figure 3: (a) Intensity profile of an optical vortex beam with beam waist 𝜔 0 and vortex waist 𝜔 𝑣 at input aperture of focusing objective. (b) Schematic diagram of stable tapping for a low-index particle in an optical vortex trap. Reproduced with permission from [47].