Using a superposition of shifted Bessel beams with different longitudinal wave vectors and orbital angular momenta, we realize an optical beam having simultaneous axial, angular, and radial focusing narrower than the Fourier limit. Our findings can be useful for optical particle manipulation and high-resolution microscopy.

中文翻译：

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体积振荡的光束。

使用具有不同纵向波矢量和轨道角动量的位移贝塞尔光束的叠加，我们实现了同时具有轴向，角度和径向聚焦比傅立叶极限窄的光束。我们的发现可用于光学粒子处理和高分辨率显微镜。