The exciton, an excited electron–hole pair bound by Coulomb attraction, plays a key role in
photophysics of organic molecules and drives practically important phenomena such as …

Key properties of quantum materials stem from dynamic interaction chains that connect
stable electronic quasiparticles through short-lived coherences, which are difficult to control …

Low-dimensional semiconductors provide a marvelous platform for pursuing versatile
photocatalytic solar energy conversion. Compared with the bulk counterparts, low …

Layered 2D perovskites are making inroads as materials for photovoltaics and light emitting
diodes, but their photophysics is still lively debated. Although their large exciton binding …

Atomically thin transition metal dichalcogenides are direct-gap semiconductors with strong
light–matter and Coulomb interactions. The latter accounts for tightly bound excitons, which …

In this Letter, we present nondegenerate ultrafast optical pump–probe studies of the carrier
recombination dynamics in MoS2 monolayers. By tuning the probe to wavelengths much …

Delocalized Bloch electrons and the low-energy correlations between them determine key
optical, electronic and entanglement functionalities of solids, all the way through to phase …

As conventional electronics approaches its limits, nanoscience has urgently sought methods
of fast control of electrons at the fundamental quantum level. Lightwave electronics—the …

Stacking monolayers of transition metal dichalcogenides into a heterostructure with a finite
twist-angle gives rise to artificial moiré superlattices with a tunable periodicity. As a …

Time-resolved, pulsed terahertz spectroscopy has developed into a powerful tool to study
charge carrier dynamics in semiconductors and semiconductor structures over the past …