Abstract

A super-length optical needle (14λ) of strong transversally polarized field with homogeneous intensity along the optical axis and subdiffraction beam size (0.9λ) can be generated by focusing a hybridly polarized vector beam through a dielectric interface with an annular high-NA lens. Moreover, it is found that the polarization of the cross section near the focal plane is radial variant. Such a nondiffracting optical needle may have applications in atom-optical experiments, such as with atom trap and atom switches.

© 2012 Optical Society of America

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