[1] [1] E. Wolf. Electromagnetic diffraction in optical systems I. An integral representation of the image field[J]. Proc. R. Soc. Ser. A, 1959, 253(1274): 349～357

[2] [2] 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

[3] [3] 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

[4] [4] T. Grosjean, D. Courjon. Smallest focal spots[J]. Opt. Commun., 2007, 272(2): 314～319

[5] [5] Q. Zhan, R. James Leger. Focus shaping using cylindrical vector beams[J]. Opt. Express, 2002, 10(7): 324～331

[6] [6] 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

[7] [7] H. He, M. E. J. Friese, 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, 75(5): 826～829

[8] [8] I. V. Basistiy, M. S. Soskin, M. V. Vasnetsov. Optical wavefront dislocations and their properties[J]. Opt. Commun., 1995, 119(5～6): 604～612

[9] [9] L. E. Helseth. Optical vortices in focal regions[J]. Opt. Commun., 2004, 229: 85～91

[10] [10] Chen Ziyang, Zhang Guowen, Rao Lianzhou et al.. Determining the orbital angular momentum of vortex beam by Young′s double-slit interference experiment[J]. Chinese J. Lasers, 2008, 35(7): 1063～1067

[11] [11] Z. Zhang, J. Pu, X. Wang. Tight focusing of radially and azimuthally polarized vortex beams through a uniaxial birefringent crystal[J]. Appl. Opt., 2008, 47(12): 1963～1967

[12] [12] J. E. Curtis, B. A. Koss, D. G. Grier. Dynamic holographic optical tweezers[J]. Opt. Commun., 2002, 207: 169～171

[13] [13] Z. Zhang, J. Pu, X. Wang, Focusing of partially coherent Bessel-Gaussian beams through a high numerical-aperture objective[J]. Opt. Lett., 2008, 33(1): 49～51

[14] [14] G. Gibson, J. Courtial, M. J. Padgett. Free-space information transfer using light beams carrying orbital angular momentum[J]. Opt. Express, 2004, 12(22): 5448～5456

[15] [15] A. Vaziri, G. Weihs, A. Zeilinger. Experimental two-photon, three-dimensional entanglement for quantum communication[J]. Phys. Rev. Lett., 2002, 89(24): 240401-1～240401-4

[16] [16] M. Gu. Advanced Optical Imaging Theory[M]. Heidelberg, New York: Springer-Verlag, 1999

[17] [17] Z. Bomzon, M. Gu. Space variant geometrical phases in focused cylindrical light beams[J]. Opt. Lett., 2007, 32(20): 3017～3019

[18] [18] Y. Zhao, J. Scott Edgar, G. D. M. Jeffries et al.. Spin-to-orbital angular momentum conversion in a strongly focused optical beam[J]. Phys. Rev. Lett., 2007, 99(7): 073901-1～073901-4

[19] [19] S. M. Barnett, L. Allen. Orbital angular momentum and nonparaxial light beams[J]. Opt. Commun., 1994,110(5～6): 670～680