Tian-Yi Cai

Dark exciton signatures in the infrared transient absorption of MoS$_2$ monolayer

Dark excitons play a central role in the nonequilibrium dynamics of two-dimensional semiconductors, but remain difficult to characterize. Transient-absorption experiments, with probes tuned in exciton-exciton transitions energy range (exc-tr-abs), can detect excitations from any populated dark excitons, including symme...