Light–matter interaction drives many systems, such as optoelectronic devices like light-
emitting diodes and solar cells, biological structures like photosystem II and potential future …

The conversion of electric power to light is an important scientific and technological
challenge. Advanced experimental methods have provided access to explore the relevant …

Watching a single molecule move on its intrinsic timescale has been one of the central goals
of modern nanoscience, and calls for measurements that combine ultrafast temporal …

Many important energy-transfer and optical processes, in both biological and artificial
systems, depend crucially on excitonic coupling that spans several chromophores,,,,,,,,. Such …

The formation of excitons in organic molecules by charge injection is an essential process in
organic light-emitting diodes (OLEDs),,,,,–. According to a simple model based on spin …

Ways to characterize and control excited states at the single-molecule and atomic levels are
needed to exploit excitation-triggered energy-conversion processes. Here, we present a …

In molecular tunnel junctions, where the molecule is decoupled from the electrodes by few-
monolayers-thin insulating layers, resonant charge transport takes place by sequential …

Given its central role in photosynthesis,,, and artificial energy-harvesting devices,,, energy
transfer has been widely studied using optical spectroscopy to monitor excitation dynamics …

Tracking electron motion in molecules is the key to understanding and controlling chemical
transformations. Contemporary techniques in attosecond science are able to generate and …

Tautomerization, the interconversion between two constitutional molecular isomers, is
ubiquitous in nature, plays a major role in chemistry and is perceived as an ideal switch …