摘要Based on vectorial Debye theory, tight focusing of radially and azimuthally polarized vortex beams passing through a dielectric interface are studied. The intensity distribution in the focal region is illustrated by numerical calculations. We show the influence of numerical-aperture (NA) on the full-width at half maximum (FWHM) of the focal spot or the focal hole. It has been found that compared with the azimuthally polarized Bessel--Gaussian (BG) beams, the longitudinal component in the z direction of the radially polarized BG beams has no influence on the FWHM of the focal spot and hole, but enhances the total light intensity.
Abstract：Based on vectorial Debye theory, tight focusing of radially and azimuthally polarized vortex beams passing through a dielectric interface are studied. The intensity distribution in the focal region is illustrated by numerical calculations. We show the influence of numerical-aperture (NA) on the full-width at half maximum (FWHM) of the focal spot or the focal hole. It has been found that compared with the azimuthally polarized Bessel--Gaussian (BG) beams, the longitudinal component in the z direction of the radially polarized BG beams has no influence on the FWHM of the focal spot and hole, but enhances the total light intensity.
(Other topics in dielectrics, piezoelectrics, and ferroelectrics and their properties)
引用本文:
ZHANG Zhi-Ming;PU Ji-Xiong;WANG Xi-Qing. Tight Focusing of Radially and Azimuthally Polarized Vortex Beams through a Dielectric Interface[J]. 中国物理快报, 2008, 25(5): 1664-1667.
ZHANG Zhi-Ming, PU Ji-Xiong, WANG Xi-Qing. Tight Focusing of Radially and Azimuthally Polarized Vortex Beams through a Dielectric Interface. Chin. Phys. Lett., 2008, 25(5): 1664-1667.
[1] Walker E P and Milster T D 2001 Proc. SPIE Int. Soc.Opt. Eng. 4443 73 [2] Bomzon Z, Kleiner V and Hasman E 2001 Appl. Phys.Lett. 79 1587 [3] Helseth L E 2002 Opt. Commun. 212 343 [4] Grosjean T and Courjon D 2007 Opt. Commun. 272 314 [5] Helseth L E 2006 Opt. Commun. 257 1 [6] Zhang Z, Pu J and Wang X 2008 Opt. Lett. 33 49 [7] Lerman G M and Levy U 2007 Opt. Lett. 32 2194 [8] Youngworth K S and Brown T G 2000 Opt. Express 7 77 [9] Rao L and Pu J 2007 Chin. Phys. Lett. 24 1252 [10] Qin Y, Zhu C, Yang H and Gong Q 2000 Chin. Phys.Lett. 17 413 [11] Dai Y, Hu X, Song J, Yu B and Qiu J 2007 Chin. Phys.Lett. 24 1941 [12] Torok P, Varga P, Laczik Z and Booker G R 1995 J.Opt. Soc. Am. A 12 325 [13] Torok P, Varga P and Booker G R 1995 J. Opt. Soc.Am. A 12 2136 [14] Torok P, Varga P, Konkol A and Booker G R 1995 J.Opt. Soc. Am. A 12 2132 [15] Gu M 2000 Advanced Optical Imaging Theory (Berlin:Springer) [16] Born M and Wolf E 1999 Principles of Optics 7th edn(Cambridge: Cambridge University Press) [17] Greene P L and Hall D G 1999 Opt. Express 4411
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