Kerker Condition for Enhancing Emission Rate and Directivity of Single Emitter Coupled to Dielectric Metasurfaces

Abstract

Metasurfaces have the ability to control classical and non‐classical states of light to achieve controlled emission even at the level of a single emitter. Here, the Kerker condition induced emission rate enhancement with strong directivity is unveiled from a single emitter integrated within a dielectric metasurface consisting 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 emission rate enhancement of 400 times is achieved close to the zero phonon line of the 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.

Silicon Carbide Metasurfaces for Controlling the Spontaneous Emission of Embedded Color Centers

“…These distributions results in multi-polar Miescattering resonances being excited in structures with dimensions of the order of the excitation wavelength [21]. A coherent superposition of these resonances leads to many interesting phenomena like, bound states in continuum (BIC) [22], tuning of the radiation directionality in the lateral or transverse directions [23] and tuning of the local optical density of states (LDOS) to achieve emission rate enhancement for emitters embedded in the metasurfaces [24].…”

A Coupled‐Dipolar Plasmonic Antenna for Enhanced and Directional Emission from a Single NV Center at the Generalized Kerker Condition

“…[ 19,20 ] The coherent superposition of Mie‐scattering moments provides directional scattering, [ 20,21 ] high‐Q super‐cavity modes, [ 22 ] bound states in continuum, [ 23 ] and LDOS enhancement using metasurfaces. [ 24 ] However, for a single plasmonic system, the absorption losses induce an unbalanced electric ( a n ) and magnetic moments $$( {{b}_{\mathrm{n}}} )\ ( {{a}_{\mathrm{n}} \ne {b}_{\mathrm{n}}} )$$. [ 25 ] Thus, the Kerker condition cannot be achieved for an individual plasmonic resonator/cavity system.…”

Enhancing the Emission Rate of the Inherent Silicon‐Vacancy Center Using Optimized Multipolar Moments in a Silicon Carbide Metasurface

“…This results in structure-induced spectrally narrow optical resonances with spatial confinement of electromagnetic field, which can modulate the quantum emitter emission properties. [24][25][26] Such metasurfaces with engineered multipolar moments have been used to achieve pulse compression, [27] to control the polarization states in a broad spectral range and their electrical tunability, [28,29] and meta-waveguides with minimal losses at telecommunication wavelength range. [30] Metasurfaces made using phase-changing material provide dynamic control over light transmission.…”

“…[33,34] Metasurfaces consist of dielectric disk resonators that exhibit strong Mie scattering resonances dominated by magnetic dipolar modes with many optical functionalities at the industry level. [21,25,34] The silicon-based metasurface is considered as a better candidate owing to its high refractive index and mature fabrication process to modulate quantum emitter emission rates. [25,35] However, the strong silicon absorption in the visible wavelength region along with the difficulty and requirement to place color centers externally inside silicon metasurfaces pose challenges in a realistic scenario, which propels the search for an alternate lossless, all-dielectric metasurface that can have inherent color centers.…”

“…[21,25,34] The silicon-based metasurface is considered as a better candidate owing to its high refractive index and mature fabrication process to modulate quantum emitter emission rates. [25,35] However, the strong silicon absorption in the visible wavelength region along with the difficulty and requirement to place color centers externally inside silicon metasurfaces pose challenges in a realistic scenario, which propels the search for an alternate lossless, all-dielectric metasurface that can have inherent color centers. Further, the single quantum emitters are highly localized in space and require high precision in alignment with the metasurface to attain significant emission enhancement.…”