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We propose a new method to generate optical needles by focusing vector beamscomprised of radially polarized component and azimuthally polarized vortexcomponents. The radial part can generate longitudinal polarization, while theazimuthal parts can generate left- and right-handed polarization. Hence, anarbitrary 3D polarization can be obtained. To our knoeledge, it may be thefirst time that arbitrarily polarized optical needles whose transverse sizesare under 0.5$\lambda$ have been achieved. And their polarized homogeneity isbeyond 0.97.

Optical needles with arbitrary homogeneous three-dimensional polarization