[1] B. Richards, E. Wolf. Electromagnetic diffraction in optical systems II. Structure of the image field in an aplanatic system[J]. Proc. Royoyal Socociety of London, 1959, 253(1274): 358~379
[2] Q. Zhan, J. R. Leger. Focus shaping using cylindrical vector beams[J]. Opt. Express, 2002, 10(7): 324~331
[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] Y. Kozawa, S. Sato. Focusing property of a doubleringshaped radially polarized beam[J]. Opt. Lett., 2006, 31(6): 820~822
[5] M. Dyba, S. W. Hell. Focal spots of size λ/23 open up farfield florescence microscopy at 33 nm axial resolution[J]. Phys. Rev. Lett., 2002, 88(16): 163901
[6] J. W. M. Chon, X. Gan, M. Gu. Splitting of the focal spot of a high numericalaperture objective in free space[J]. Appl. Phys. Lett., 2002, 81(9): 1576~1578
[7] R. Dorn, S. Quabis, G. Leuchs. Sharper focus for a radially polarized light beam[J]. Phys. Rev. Lett., 2003, 91(23): 233901
[8] D. P. Biss, T.G. Brown. Cylindrical vector beam focusing through a dielectric interface[J]. Opt. Express, 2001, 9(10): 490~497
[9] Zhou Zhehai, Tan Qiaofeng, Jin Guofan. Focusing of high polarization order axiallysymmetric polarized beams[J]. Chin. Opt. Lett., 2009, 7(10): 938~940
[11] P. L. Greene, D. G. Hall. Diffraction characteristics of the azimuthal BesselGauss beam[J]. J. Opt. Soc. Am. A, 1996, 13(5): 962~966
[12] L. Greene, D. G. Hall. Properties and diffraction of vector BesselGauss beams[J]. J. Opt. Soc. Am. A, 1998, 15(12): 3020~3027
[15] Shunichi Sato, Yuichi Kozawa. Hollow vortex beams[J]. J. Opt. Soc. Am. A, 2009, 26(1): 142~146
[16] 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
[17] Min Gu, Smitha Kuriakose, Xiaosong Gan. A single beam nearfield laser trap for optical stretching, folding and rotation of erythrocytes[J]. Opt. Express, 2007, 15(3): 1369~1375