Cathodoluminescence spectroscopy in conjunction with second-order auto-correlation measurements of g_2(τ) allows to extensively study the synchronization of photon emitters in low-dimensional structures. Co-existing excitons in two-dimensional transition metal dichalcogenide monolayers provide a great source of identical photon emitters which can be simultaneously excited by an electron. Here, we demonstrate large photon bunching with g_2(0) up to 156±16 of a tungsten disulfide monolayer (WS2), exhibiting a strong dependence on the electron-beam current. To further improve the excitation synchronization and the electron-emitter interaction, we show exemplary that the careful selection of a simple and compact geometry -- a thin, monocrystalline gold nanodisk -- can be used to realize a record-high bunching g_2(0) of up to 2152±236. This approach to control the electron excitation of excitons in a WS2 monolayer allows for the synchronization of photon emitters in an ensemble, which is important to further advance light information and computing technologies.

No abstract

Cathodoluminescence spectroscopy in conjunction with second-order auto-correlation measurements of g 2 (τ) allows to extensively study the synchronization of quantum light sources in low-dimensional structures. Coexisting excitons in two-dimensional transition metal dichalcogenide monolayers provide a great source of identical quantum emitters which can be simultaneously excited by an electron. In this article, we demonstrate large photon bunching with g 2 (0) up to 156 ± 16 of a tungsten disulfide monolayer, exhibiting a strong dependence on the electron-beam current density. To further improve the excitation synchronization and the electronemitter interaction, we show exemplary that the careful selection of a simple and compact geometry -a thin, monocrystalline gold nanodisk -can be used to realize a record-high bunching g 2 (0) of up to 2152 ± 236. This approach to control the electron excitation of excitons in a WS 2 monolayer allows for the synchronization of quantum emitters in an ensemble, which is important to further advance quantum information processing and computing technologies.