[1] Yang L X, Xie X S, Wang S C, et al. Minimized spot of annular radially polarized focusing beam［J］. Optics Letters, 2013, 38(8): 1331-1333.

[2] Kozawa Y, Sato S. Numerical analysis of resolution enhancement in laser scanning microscopy using a radially polarized beam［J］. Optics Express, 2015, 23(3): 2076-2084.

[3] Zhu B Z, Shen S H, Zheng Y, et al. Numerical studies of focal modulation microscopy in high-NA system［J］. Optics Express, 2016, 24(17): 19138-19147.

[4] Sheppard C J R, Choudhury A. Annular pupils, radial polarization, and superresolution［J］. Applied Optics, 2004, 43(22): 4322-4327.

[5] Kozawa Y, Hibi T, Sato A, et al. Lateral resolution enhancement of laser scanning microscopy by a higher-order radially polarized mode beam［J］. Optics Express, 2011, 19(17): 15947-15954.

[6] Chen Y K, Zhang D G, Han L, et al. Surface-plasmon-coupled emission microscopy with a polarization converter［J］. Optics Letters, 2013, 38(5): 736-738.

[7] Wang H F, Shi L P, Lukyanchuk B, et al. Creation of a needle of longitudinally polarized light in vacuum using binary optics［J］. Nature Photonics, 2008, 2(8): 501-505.

[8] 刘雪宁, 王吉明, 赫崇君, 等. 不同数值孔径下调控矢量光束聚焦场的反向构建［J］. 光学学报, 2014, 34(1): 0114004.

    Liu Xuening, Wang Jiming, He Chongjun, et al. Backward focus engineering with controlled cylindrical vector beams under different numerical apertures［J］. Acta Optica Sinica, 2014, 34(1): 0114004.

[9] Xie X S, Chen Y Z, Yang K, et al. Harnessing the point-spread function for high-resolution far-field optical microscopy［J］. Physical Review Letters, 2014, 113(26): 263901.

[10] Dorn R, Quabis S, Leuchs G. Sharper focus for a radially polarized light beam［J］. Physical Review Letters, 2010, 91(23): 233901.

[11] 蔡勋明, 赵晶云, 范梦慧, 等. 椭圆环光阑对径向偏振光聚焦研究的影响［J］. 光学学报, 2016, 36(3): 0326002.

    Cai Xunming, Zhao Jingyun, Fan Menghui, et al. Effect of the elliptic annular aperture on the focusing of radially polarized beam［J］. Acta Optica Sinica, 2016, 36(3): 0326002.

[12] Wai T T, Yew E Y S Y, Colin J R S. Polarization conversion in confocal microscopy with radially polarized illumination［J］. Optics Letters, 2009, 34(14): 2147-2149.

[13] Li P, Liu S, Xie G F, et al. Modulation mechanism of multi-azimuthal masks on the redistributions of focused azimuthally polarized beams［J］. Optics Express, 2015, 23(6): 7131-7139.

[14] 陈国钧, 周巧巧, 纪宪明, 等. π相位板产生矢量光束的高数值孔径聚焦特性研究［J］. 光学学报, 2014, 34(12): 1226001.

    Chen Guojun, Zhou Qiaoqiao, Ji Xianming, et al. Study on high-numerical-aperture-focused characteristics of vector beam produced by π phase plate［J］. Acta Optica Sinica, 2014, 34(12): 1226001.

[15] Chen G Y, Song F, Wang H T. Sharper focal spot generated by 4π tight focusing of higher-order Laguerre-Gaussian radially polarized beam［J］. Optics Letters, 2013, 38(19): 3937-3940.

[16] Chen B S, Zhang Z M, Pu J X. Tight focusing of partially coherent and circularly polarized vortex beams［J］. Journal of the Optical Society of America A, 2009, 26(4): 862-869.

[17] Youngworth K S, Brown T G. Focusing of high numerical aperture cylindrical-vector beams［J］. Optics Express, 2000, 7(2): 77-87.