Generation of super-length optical needle by focusing hybridly polarized vector beams through a dielectric interface
Generation of super-length optical needle by focusing hybridly polarized vector beams through a dielectric interface
复制标题
通过介电界面聚焦混合偏振矢量光束生成超长光针
DOI：
10.1364/ol.37.003303
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发表时间：
2012-08-15
期刊：
影响因子：
3.6
通讯作者：
Pu, Jixiong
中科院分区：
文献类型：
--
作者：
Hu, Kelei;Chen, Ziyang;Pu, Jixiong
利用环形高na透镜将混合偏振矢量光束通过介电界面聚焦，可以产生具有沿光轴均匀强度和亚衍射光束尺寸（约0.9 λ）的强横向极化场的超长光学针（约14 λ）。此外，还发现焦平面附近截面的偏振是径向变化的。这种无衍射光学针可以应用于原子光学实验，如原子阱和原子开关。(C) 2012美国光学学会
A super-length optical needle (similar to 14 lambda) of strong transversally polarized field with homogeneous intensity along the optical axis and subdiffraction beam size (similar to 0.9 lambda) can be generated by focusing a hybridly polarized vector beam through a dielectric interface with an annular high-NA lens. Moreover, it is found that the polarization of the cross section near the focal plane is radial variant. Such a nondiffracting optical needle may have applications in atom-optical experiments, such as with atom trap and atom switches. (C) 2012 Optical Society of America