Kerker condition for enhancing emission rate and directivity of single emitter coupled to dielectric metasurfaces

TL;DR

This paper demonstrates how the Kerker condition in dielectric metasurfaces can significantly enhance emission rates and directivity of single emitters, with potential applications in quantum photonics.

Contribution

It reveals the Kerker condition's role in emission enhancement and directivity control in dielectric metasurfaces with silicon nano-disks, supported by simulations and analytical calculations.

Findings

400-fold emission rate enhancement at NV center zero phonon line

Unidirectional light scattering due to interference of multipoles

Implications for single photon sources and quantum interfaces

Abstract

Metasurfaces have the ability to control classical and non-classical states of light to achieve controlled emission even at the level of single emitter. Here, we unveil the Kerker condition induced emission rate enhancement with strong directivity from a single emitter integrated within a dielectric metasurface consists of silicon nano-disks. The simulation and analytical calculations attest the Kerker condition with unidirectional light scattering evolved by the constructive interference between electric dipole, toroidal dipole, and the magnetic quadrupole. The results evince spatially-dependent enhanced local density of optical states which reciprocates localized field intensity. The rate enhancement of 400 times is achieved at zero phonon line of nitrogen-vacancy center with superior emission directivity and collection efficiency. The results have implications in on-demand single photon generation, spin-photon interface, many-body interactions, and strong coupling.