Enhancement of exciton emission in WS₂based on the Kerker effect from the mode engineering of individual Si nanostripes

Abstract

<p>Coupling between nanostructures and excitons has attracted great attention for potential applications in quantum information technology.</p>

Resonance Couplings in Si@MoS2 Core–Shell Architectures

“…This has direct applications in optoelectronic devices such as light sources, lasers, single‐photon sources, and chiral sensing devices. [ 3,4,6–14 ]…”

“…[3,4,[6][7][8][9][10][11][12][13][14] Because the optical manipulation of excitons in the heterostructures relies on the optical coupling between cavity resonances and excitons, demonstrating couplings with various coupling strengths is important to realize various state-of-the-art devices such as quantum information processing, all-optical switches, and excitonpolariton lasers. [3,4,[6][7][8][9][10][11][12][13][14] For example, in the Fano resonance regime (weak coupling), the cavity resonance can enhance spontaneous emission of excitons by the Purcell effect. [14,15] Moreover, emission directionality and spectral shape can be engineered by Fano interference, which is useful in sensors, data storage technology, and topological optics.…”

“…This has direct applications in optoelectronic devices such as light sources, lasers, single-photon sources, and chiral sensing devices. [3,4,[6][7][8][9][10][11][12][13][14] Because the optical manipulation of excitons in the heterostructures relies on the optical coupling between cavity resonances and excitons, demonstrating couplings with various coupling strengths is important to realize various state-of-the-art devices such as quantum information processing, all-optical switches, and excitonpolariton lasers. [3,4,[6][7][8][9][10][11][12][13][14] For example, in the Fano resonance regime (weak coupling), the cavity resonance can enhance spontaneous emission of excitons by the Purcell effect.…”

Engineering Radiative Energy Transfer and Directional Excitonic Emission in van der Waals Heterostructures

“…Dielectric functions of hBN and WS 2 were obtained from the literature. [ 39 ] For the simulation of absorption, two planar detectors were used to detect the transmitted light across 1L‐WS 2 . For the simulation of collected radiation, in‐plane electric dipole sources embedded in 1L‐WS 2 were used, whose radiations were collected by top planar detectors acting as a “collection objective.” Phases and amplitudes of electric dipole sources were based on further calculations.…”

WS2/hBN Hetero-nanoslits with Spatially Mismatched Electromagnetic Multipoles for Directional and Enhanced Light Emission

“…Recently, high refractive index dielectric nanostructures with strong Mie-type resonances bring another way to enhance the light–matter interactions of TMDCs. − In fact, TMDCs with refractive indices higher than those of silicon and strong exciton transition , are better choices in both active and passive nanodevices. However, most studies focus on monolayer or few-layer TMDCs; thorough studies are still lacking in multilayer TMDCs with enough thickness to support Mie-type resonances.…”