Presentation Information
[20p-A602-13][JSAP-Optica Joint Symposia 2023 Invited Talk] Moiré excitonic states in a twisted WSe2/MoSe2 heterobilayer
〇Keisuke Shinokita1 (1.IAE, Kyoto Univ.)
Keywords:
two dimensional semiconductors,van der Waals heterostructures,moire excitons
Atomically thin transition metal dichalcogenides (TMDs) are highly attractive for studying two-dimensional systems due to their exceptional optical properties associated with valley degrees of freedom. Van der Waals heterostructures composed of TMDs offer a captivating platform for manipulating optically induced excitonic properties by forming moiré patterns, which emerge from angular mismatch and give rise to novel quantum phenomena. The periodic trap potential created by the moiré pattern facilitates the formation of spatially ordered ensembles of zero-dimensional excitons, known as moiré excitons. These excitons hold promise for applications such as dense coherent quantum emitters and the quantum simulation of many-body physics.
In this study, we comprehensively characterize the excitonic states within the moiré potential in a twisted WSe2/MoSe2 heterolayer. Through photoluminescence excitation (PLE) spectroscopy, we unveil the discrete energy levels present within the moiré potential. Moreover, circularly-polarized photoluminescence (PL) spectroscopy provides valuable insights into the intricate fine structures exhibited by the moiré excitons.
In this study, we comprehensively characterize the excitonic states within the moiré potential in a twisted WSe2/MoSe2 heterolayer. Through photoluminescence excitation (PLE) spectroscopy, we unveil the discrete energy levels present within the moiré potential. Moreover, circularly-polarized photoluminescence (PL) spectroscopy provides valuable insights into the intricate fine structures exhibited by the moiré excitons.