[1] [1] K. I. Willing, J. Keller, M. Bossi et al.. STED microscopy resolves nanoparticle assemblies [J]. New J. Phys., 2006, 8(106): 1～8

[2] [2] G. D. Jeffries, J. S. Edgar, Y. Zhao et al.. Using polarization-shaped optical vortex traps for single-cell nanosurgery [J]. Nano. Lett., 2007, 7(2): 415～420

[3] [3] G. M. Lerman, U. Levy. Tight focusing of spatially variant vector optical fields with elliptical symmetry of linear polarization [J]. Opt. Lett., 2007, 32(15): 2194～2196

[4] [4] L. E. Helseth. Smallest focal hole [J]. Opt. Commum., 2006, 257(1): 1～8

[5] [5] H. E, M. E. J. Frises, N. R. Heckenberg et al.. Direct observation of transfer of angular momentum to absorptive particles from a laser beam with a phase singularity [J]. Phys. Rev. Lett., 1995, 75S(5): 826～829

[6] [6] J. W. M. Chon, X. Gan, M. Gu. Splitting of the focal spot of a high numerical-aperture objective in the free space [J]. Appl. Phys. Lett., 2002, 81(9): 1576～1578

[7] [7] B. Chen, Z. Zhang, J. Pu. Tight focusing of partially coherent and circularly polarized vortex beams[J]. J. Opt. Soc. Am. A, 2009, 26(4): 862～869

[8] [8] B. Chen , J. Pu. Tight focusing of elliptically polarized vortex beams[J]. Appl. Opt., 2009, 48(7): 1288～1294

[9] [9] Zhang Zhiming, Pu Jixiong, Wang Xiqing. Focusing of cylindrically polarized Bessel-Gaussian beams through a high numerical-aperture lens[J]. Chinese J. Lasers, 2008, 35(3): 401～405

[10] [10] Z. Zhang, J. Pu, X. Wang. Tightly focusing of linearly polarized vortex beams through a dielectric interface[J]. Opt. Commun., 2008, 281(13): 3421～3426

[11] [11] I. V. Basistiy, M. S. Soskin, M. V. Vasnetsov. Optical wavefront dislocations and their properites[J]. Opt. Commun., 1995, 119(5-6): 604～612

[12] [12] D. M. Palacios, I. D. Maleev, A. S. Marathay et al.. Spatial correlation singularity of a vortex field[J]. Phys. Rev. Lett., 2004, 92(14): 143905

[13] [13] A. Y. Bekshaev, M. S. Soskin, M. V. Vasnetsov. Transformation of higher-order optical vortices upon focusing by an astigmatic lens[J]. Opt. Commun., 2004, 241(4-6): 237～247

[14] [14] L. H. Helseth. Optical vortices in focal regions[J]. Opt. Commun., 2004, 229(1-6): 85～91

[15] [15] Z. Zhang, J. Pu, X. Wang. Tight focusing of a radially and azimuthally polarized vortex beams through a uniaxial birefingent crystal[J]. Appl. Opt., 2008, 47(12): 1963～1967

[16] [16] Chen Baosuan, Pu Jixiong, Zhang Zhiming et al.. Focusing of partially coherent and circularly polarized Bessel-Gaussian beams through a high numerical-aperture objective[J]. Acta Optica Sinica, 2009, 29(6): 1664～1670

[17] [17] D. P. Biss, T. G. Brown. Primary aberrations in focused radially polarized vortex beams[J]. Opt. Express, 2004, 12(3): 384～393

[18] [18] R. K. Singh, P. senthilkumaran, k. Singh. Effect of primary spherical aberration on high-numerical-aperture focusing of a Laguerre-Gaussian beam[J]. J. Opt. Soc. Am. A, 2008, 25(6): 1307～1318

[19] [19] Liu Yong, Zhao Zhaoxiong, Zhao Fujian. Effect of primary spherical aberration on focusing of circularly polarized vortex Bessel-Gaussian beams[J]. Acta Photonica Sinica, 2009, 38(10): 2660～2663

[20] [20] Liu Yong, Chen Jiabi. Effect of primary spherical aberration on focusing field of cylindrical-vector Bessel-Gaussian beams[J]. Acta Optica Sinica, 2009, 29(7): 1996～1999

[21] [21] R. H. Jordan, D. G. Hall. Free-space azimuthal paraxial wave equation: the azimuthal Bessel-Gauss beam solution[J]. Opt. Lett., 1944, 19(7): 427～429

[22] [22] R. Kant. An analytical solution of vector diffraction for focusing optical systems with Seidel aberrations I. Spherical aberration, curvature of field, and distortion[J]. J. Mod. Opt., 1993, 40(11): 2293～2310