Strong light-matter interactions in hybrid nanostructures with transition metal dichalcogenides

Abstract

Research efforts of light-matter in the nanoscale have focused on the manipulation of matter hybridized with photons under the strong coupling regime. Transition metal dichalcogenides (TMDs) have became ideal candidates for the study of strong light-matter interactions due to the formation of in-plane excitons exhibiting giant oscillator strength with narrow-band, well-pronounced optical transitions, which can be readily coupled to various optical excitations. The study of TMD-based strong coupling are leading to striking discoveries in many applications such as polariton condensation, lasing, all-optical switches and quantum information processing. This review summarizes the recent advances in strong coupling of TMD excitons with different types of nanostructures including traditional optical cavities, plasmonic nanocavities and all-dielectric nanoresonators. We finally discuss the future perspectives and possible directions on the TMD-based strong exciton-photon interactions in strong coupling regime.

Second Harmonic Generation Control in 2D Layered Materials: Status and Outlook

“…[202][203][204] On the other hand, enhancing lightmatter interaction in 2DLMs is also significantly important due to their short light-matter interaction length. [205,206] Therefore, in the following, we mainly discuss the strategies for modulation and enhancement of SHG response in 2DLMs that can be divided into two categories: a) symmetry breaking based on 𝜒 (2) of material itself; 2) light-matter interaction related to the material's electromagnetic field environment E through resonance effects, as seen in Figure 2.…”

“…However, NPoM systems based on NPs usually produce out-of-plane local electric field. [206] Moreover, the random dispersion of metallic NPs leads to the blocking and nonuniformity of light emission from 2DLMs.…”

“…When the exchange rates between the excitons and the optical cavities are faster than their dissipation rates, strong coupling occurs, resulting in Rabi splitting and anticrossing behavior in the optical spectra. [206] Extensive studies have successfully realized the strong coupling between excitons of TMDs and various nanostructures, including photonic microcavities, plasmonic and dielectric nanoresonators such as periodic metasurfaces and nanocavities formed by individual NPs. [98,100,311,326,338,356,360,398] Until now, there are several types of exciton-plasmon polaritons that have been widely reported.…”