Localized EM and photonic jets from non-spherical and non-symmetrical dielectric mesoscale objects: Brief review

The interest to mesoscale dielectric objects, whose effective dimensions are comparable with the incident radiation wavelength, is caused by their unique ability to modify the spatial structure of the incident wave in the specific manner and to produce a highly localized intensive optical flux (“photonic jet”) with the subwavelength spatial resolution. In the current paper we brief review the modern state‐of‐the‐art of main principles of the photonic jet formation by non‐spherical and non‐symmetrical dielectric mesoscale particles both in transmitting and reflection mode. A deeper understanding of the photonic jet is nevertheless needed to fully exploit the potential performance of nano‐ and micro‐ dielectric mesoscale objects as diffractive components at different wavebands. So far, the bulk of theoretical studies of so‐called photonic jets are devoted to the light jets originated from microparticles with high degree of spatial symmetry like spheres, spheroids, cylinders, disks because of their unique capability to produce extreme spatial field localization. In this paper we intend to fill this gap and brief review of investigations on EM‐jet formation by the 3D mesoscale particles with more complicated non‐spherical spatial shapes and even by non‐symmetric bodies both in transmitting and reflection modes.