we perform a thorough study of the generation of optical needles induced by the azimuthally polarized(AP) beam. The action mechanism between the AP beam and different elements is analyzed to form a complete theoretical design system. We prove that the AP beam has a significant advantage over the radically polarized beam in generating optical needles. In the experiment, we obtain an optical needle with full width at half maximum of 0.416λ and longitudinal full width at half maximum of 15.6λ

中文翻译：

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方位角偏振光束诱导的超长光针的产生


我们对方位偏振（AP）光束引起的光针的产生进行了全面的研究。分析AP梁与不同元件之间的作用机理，形成完整的理论设计体系。我们证明AP光束在产生光针方面比径向偏振光束具有显着的优势。实验中获得半高宽为0.416λ、纵向半高宽为15.6λ的光针