%0 Journal Article
%T Longitudinally polarized subwavelength beam generated by focusing radially modulated Bessel-Gaussian beam<br>聚焦径向调制Bessel-Gaussian光束实现亚波长尺寸纵向偏振光束
%A Yu Yong-Jiang
%A Chen Jian-Nong
%A Yan Jin-Liang
%A Wang Fei-Fei
%A <br>于永江
%A 陈建农
%A 闫金良
%A 王菲菲
%J 物理学报
%D 2011
%I 
%X 亚波长尺寸纵向偏振光束在粒子加速,单个分子偶极矩测量,二次谐波成像和纵向偏振共焦显微镜等方面有非常广泛的应用.本文提出径向调制的Bessel-Gaussian光束模型,经高数值孔径显微物镜聚焦可以获得高纯度的纵向偏振光束.利用矢量衍射理论数值模拟了焦点附近光强分布、磁场分布和能流密度空间分布.结果表明光斑半高全宽度可以达到0.4λ.该方法无需环形孔径或环形相位滤波器,光能利用率高,分辨率好,达到改进各种应用的效果.
%K Bessel-Gaussian beam
%K longitudinally polarized beams
%K focusing
%K subwavelength<br>Bessel-Gaussian光束
%K 纵向偏振光束
%K 聚焦
%K 亚波长
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=893232D57E5D47FC9B3B53C5A898974D&yid=9377ED8094509821&vid=BFE7933E5EEA150D&iid=E158A972A605785F&sid=D6354F61445E9456&eid=FBCA02DBD05BD4EA&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=29