SKM 2023 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 47: 2D Materials VI (joint session HL/CPP)
CPP 47.8: Talk
Thursday, March 30, 2023, 11:30–11:45, POT 81
Pump Probe Signatures of Interlayer Excitons in TMDC Heterostructures — •Henry Mittenzwey1, Manuel Katzer1, Benjamin Kaiser2, Veronica Policht3, Oleg Dogadov3, Stefano Dal Conte3, Giulio Cerullo3, Andreas Knorr1, and Malte Selig1 — 1Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — 2Zuse Institute Berlin, Takustraße 7, 14195 Berlin, Germany — 3Dipartimento di Fisica, Politecnico di Milano, I-20133 Milano, Italy
TMDC heterobilayers are promising candidates for novel optoelectronic applications, since they exhibit long-lived excitonic states with spatially separated electrons and holes located in different layers. The relaxation dynamics of these interlayer excitons and their interplay with intralayer excitons are still under investigation.
Here, we present a microscopic description for the phonon and tunneling induced formation and relaxation of intra- and interlayer excitons in a MoSe2/WSe2 stack. Based on the microscopic dynamics we calculate the pump probe signal for intra- and interlayer transition and their population dynamics including hot exciton bottleneck effects and unbound interlayer occupations.