Insights into Ultrafast Dynamics in Two-Dimensional Quantum Materials for Quantum Technological Applications
ABSTRACT :
Designing innovative materials for the establishment of quantum technologies involves scientific challenges to comprehend and control carrier excitation, relaxation, transport, and decoherence processes in ultrafast time scales. Due to reduced dimensionality and dielectric screening, the charges in an atomically flat 2D material can interact strongly forming excitons, bi-excitons, and trions. The existence of such quasiparticles and strong light-matter interactions promises the development of quantum emitters and ultrafast manipulation of quantum states in 2D materials. This talk will review the experimental advances in the application of 2D materials for quantum technologies. With a short introduction to ultrafast spectroscopy, our recent results on ultrafast carrier dynamics in 2D materials which reveal the exciton formation and dissociation, auger scattering, and band gap renormalization processes will be presented. Combining metal and semiconductor materials to form hybrid superstructures shows unique properties which can supersede the combined function of individual materials because of their synergistic behavior. The advantages of combining 2D materials with plasmonic nanostructures for the upcoming quantum device applications will be presented.