Curved photonic jet produced from a spherical particle illuminated by a Bessel-Gaussian beam. (September 2021) - Cheng, Yongchang
Highlights: A curved hollow photonic jet is formed from a spherical particle illuminated by a Bessel-Gaussian beam. The field of Bessel-Gaussian beam is expressed in terms of angular spectrum decomposition method. Near-field of scattered light is numerically calculated with the generalized Mie theory. Abstract: Researches have shown that an electromagnetic field can be made to curve after propagation through a small asymmetric particle in recent years. This effect was called photonic hook or curved photonic jet. It was believed that a symmetric particle like spheres and cylinders produces straight photonic jet only. In this work, we report a curved hollow photonic jet produced by a spherical particle under the illumination of a circular high-order Bessel-Gaussian beam. With the numerical simulation, it is found that the structure of the curved hollow photonic jet depends closely on the parameters of both the beam and particle. The work may open a pathway to generate new types of curved photonic jets from symmetric particle illuminated by shaped beams.