%0 Journal Article
%T Tight Focusing of Radially and Azimuthally Polarized Vortex Beams through a Dielectric Interface<br>
%A ZHANG Zhi-Ming
%A PU Ji-Xiong
%A WANG Xi-Qing
%A <br>
%J 中国物理快报
%D 2008
%I 
%X 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.
%K 41
%K 85
%K Lc
%K 77
%K 90
%K +k<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=2C464E88D50459055913CABE5CEBADEE&yid=67289AFF6305E306&vid=C5154311167311FE&iid=94C357A881DFC066&sid=27B74BA4EDC40A8D&eid=0D3639620E137999&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0