Generation of multiple sub wavelength focal spot segments using radially polarized Bessel Gaussian beam with complex phase filter
Generation of multiple sub wavelength focal spot segments using radially polarized Bessel Gaussian beam with complex phase filter
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DOI：
10.1016/j.ijleo.2013.12.009
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发表时间：
2014-07
期刊：
影响因子：
3.1
通讯作者：
K. Prabakaran;K. Rajesh;T. Pillai
中科院分区：
文献类型：
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作者：
K. Prabakaran;K. Rajesh;T. Pillai
我们提出了一种通过相位调制径向偏振贝塞尔高斯光束的紧密聚焦来生成亚波长尺寸的多个焦斑段的新方法。通过矢量衍射理论从理论上研究了聚焦特性。我们观察到，通过适当调整入射径向偏振贝塞尔高斯（BG）光束的相位，可以生成具有不同轴向距离分离的多个焦点结构的焦段。还讨论了这种焦点整形技术的潜在应用。
We propose a new approach for generating multiple focal spot segment of sub wavelength size, by tight focusing of phase modulated radially polarized Bessel Gaussian beam. The focusing properties are investigated theoretically by vector diffraction theory. We observed that focal segment with multiple focal spots structure separated with different axial distance can be generated by properly tuning the phase of the incident radially polarized Bessel Gaussian (BG) beam. Potential applications of this focal shaping technique are also discussed.