Generalized Kerker effects in nanophotonics and meta-optics [Invited]

Abstract

The original Kerker effect was introduced for a hypothetical magnetic sphere, and initially it did not attract much attention due to a lack of magnetic materials required. Rejuvenated by the recent explosive development of the field of metamaterials and especially its core concept of optically-induced artificial magnetism, the Kerker effect has gained an unprecedented impetus and rapidly pervaded different branches of nanophotonics. At the same time, the concept behind the effect itself has also been significantly expanded and generalized. Here we review the physics and various manifestations of the generalized Kerker effects, including the progress in the emerging field of meta-optics that focuses on interferences of electromagnetic multipoles of different orders and origins. We discuss not only the scattering by individual particles and particle clusters, but also the manipulation of reflection, transmission, diffraction, and absorption for metalattices and metasurfaces, revealing how various optical phenomena observed recently are all ubiquitously related to the Kerker's concept.

Characteristics of electric quadrupole and magnetic quadrupole coupling in a symmetric silicon structure

“…More intuitive 3D scattering patterns are plot at the right side of the figure 4(b). These patterns coincides with the theoretical results [42]. It is worth noting that the side lobes of the scattering pattern in the y-z plane is relatively larger than those in the x-z plane.…”

Transparency and perfect absorption of all-dielectric resonant metasurfaces governed by the transverse Kerker effect

“…electric quadrupole (EQ) and magnetic quadrupole (MQ) moments and so on). The manifestation of inter-arXiv:1905.10538v1 [physics.optics] 25 May 2019 play between the multipolar moments in the scattering by particles of an arbitrary shape under different radiation conditions is now referred to as generalized Kerker effect [24,25] (see also extensions specific for the generalized Kerker effect listed in [26]).…”

Near‐Infrared Super‐Absorbing All‐Dielectric Metasurface Based on Single‐Layer Germanium Nanostructures

“…First, in order to satisfy the impedance matching condition for zero reflection ( R = | r | 2 = 0) for this structure, an electric dipole resonance ( ED ) and a magnetic dipole resonance ( MD ) should be induced simultaneously inside each Ge disk. When they spectrally overlap and oscillate in phase with each other, a unidirectional forward scattering behavior instead of a donut‐shaped radiation appears, known as Kerker Condition, where . Therefore, there is no re‐emission of the electromagnetic field in the backward direction, that is, R = 0 ( r = 0) ( I in Figure ).…”

“…Besides, the back metallic reflector results in strong reflections outside the absorption band, which limits the freedom to design a resonant absorber that is transparent out of the absorption band . In this circumstance, the concept of all‐dielectric metasurfaces is adopted to construct all‐dielectric absorber without the aid of metals and it has been experimentally demonstrated in the terahertz region using silicon …”