Femtosecond nonlinear spectroscopy is the main tool for the time-resolved detection of
photophysical and photochemical processes. Since most systems of chemical interest are …

Molecular‐level understanding of photoinduced processes is critically important for
breakthroughs in transformative technologies utilizing light, ranging from photomedicine to …

An ab initio theoretical framework for the simulation of femtosecond time-resolved transient
absorption (TA) pump–probe (PP) spectra with quasi-classical trajectories is presented. The …

A unified description is presented of sequential and coherent contributions to optical
transient absorption measured by femtosecond pump-supercontinuum probe spectroscopy …

Femtosecond transient UV/vis absorption spectra of molecules in solution show vibronic
structure initially while pump and probe pulses overlap, superimposed on bands which …

We introduce and analyze the concept of the “ideal” time and frequency resolved transient-
absorption pump-probe (PP) signal. The ideal signal provides the most direct link between …

Coherent vibrational oscillations in femtosecond transient-absorption spectra have been
interpreted since the 1990s using a model based on Gaussian wavepacket dynamics. The …

Molecular vibrational coherence from impulsive stimulated Raman (SR) scattering, as
observed by broadband transient absorption spectroscopy, is treated within the well-known …

We demonstrate the use of multiresonant coherent multidimensional spectroscopy (CMDS)
for obtaining 2D spectra of the diagonal and cross-peaks of the 1S and 1P excitons and …

We have extended the doorway− window representation of optical pump− probe
spectroscopy with weak pulses toward N-wave-mixing spectroscopy with temporally well …