Room Temperature Fluorescence Blinking in MoS2 Atomic Layers by Single Photon Energy Transfer

Abstract

AbstractThe quantum optical phenomena, such as single‐photon emission, in transition metal dichalcogenides (TMDCs) have triggered extensive research on 2D material‐based quantum optics and devices. By far, most reported quantum optical emissions in TMDCs are based on atomic defects or the local confinement of excitons. In contrast, energy transfer between two materials could also manipulate the photon emission behaviors in materials, even at the single‐photon level. Here, fluorescence blinking from MoS2 atomic layers in quantum dot (QD)/MoS2 hybrid heterostructure at room temperature is reported. The single‐photon nature of the QDs in heterostructures by second‐order photon correlation measurements is demonstrated. Based on the transient PL spectroscopy and PL time trajectories, the fluorescence blinking behavior in MoS2 is attributed to the single‐photon energy transfer from QD to MoS2. This work could open the possibility to achieve correlated quantum emitters in TMDCs at room temperature.