In this work, we present an investigation of the process of photonic hook generation using mesoscale finite-size graded-index elliptical particle under illumination of limited space. The combination of illuminating beamwidth and polarization allows efficient beam shaping and directionality control of photonic hook. The switching of photonic hook is achieved by changing the graded-index of the elliptical particle with index grading type parameter g . The finite-different time-domain simulations demonstrate that the long photonic hook could be obtained by low g , whereas the narrow photonic hook could be obtained by high g . Moreover, the bending direction of photonic hook could be controlled by the polarization state of incident beam. The adjustable graded-index and illumination of the elliptical particle open up a route for simple and versatile control of photonic hook generation.

中文翻译：

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通过良好控制的有限尺寸渐变折射率微椭球体对光子钩进行整形

在这项工作中，我们提出了在有限空间照明下使用中尺度有限尺寸渐变指数椭圆粒子产生光子钩的过程的研究。照射光束宽度和偏振的组合允许有效的光束成形和光子钩的方向性控制。通过用指数分级类型参数g改变椭圆粒子的分级指数来实现光子钩的切换。有限差分时域仿真表明，低g可以获得长的光子钩，而高g可以获得窄的光子钩。此外，光子钩的弯曲方向可以通过入射光束的偏振态来控制。