ABSTRACT A multitude of ultrafast photoinduced reactions in organic semiconductors are
governed by the close interplay between nuclear and electronic degrees of freedom. From …

Abstract Optical Coherent Multidimensional Spectroscopy (CMDS) has been developed to
probe the electronic states of a diverse range of complex systems. The great advantage of …

Singlet fission, a multistep molecular process in which one photon generates two triplet
excitons, holds great technological promise. Here, by applying a combination of transient …

We present a hollow-core fiber (HCF) based transient absorption experiment, with
capabilities beyond common titanium: sapphire based setups. By spectral filtering of the …

Femtosecond laser pulses readily produce coherent quantum beats in transient–absorption
spectra. These oscillatory signals often arise from molecular vibrations and therefore may …

The finite spectral line width of an ensemble of CdSe nanocrystals arises from size and
shape inhomogeneity and the single-nanocrystal spectrum itself. This line width directly …

Conical intersections are molecular configurations at which adiabatic potential-energy
surfaces touch. They are predicted to be ubiquitous, yet condensed-phase experiments …

We devised a novel two-step reference scheme that can greatly suppress the additive and
convolutional noises in heterodyne nonlinear spectroscopy. To optimally remove additive …

Ultrafast spectroscopy often involves measuring weak signals and long data acquisition
times. Spectra are typically collected as a “pump–probe” spectrum by measuring differences …

Coherent multidimensional optical spectroscopy is an emerging technique for resolving
structure and ultrafast dynamics of molecules, proteins, semiconductors, and other materials …