title: Generation of super-length optical needle by focusing hybridly polarized vector beams through a dielectric interface.
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.
authors: College of Information Science & Engineering, Institute of Optics & Photonics, Huaqiao University, Xiamen, Fujian 361021, China.
authors: Kelei
authors: K
authors: Hu
authors: Ziyang
authors: Z
authors: Chen
authors: Jixiong
authors: J
authors: Pu