Ultrafast solvent dynamics of room-temperature ionic liquids have been investigated by
optical heterodyne-detected Raman-induced Kerr-effect spectroscopy (OHD-RIKES) by
studying the effects of cation and anion substitution on the low frequency librational modes …

We have measured the intermolecular dynamics of the 1, 3-dialkylimidazolium-based room-
temperature ionic liquids (RTILs)[emim][BF4],[emim][DCA], and [bmim][DCA] at 25° C from
below 1 GHz to 10 THz by ultrafast optical Kerr effect (OKE) spectroscopy and dielectric …

It is often assumed that the anisotropy in time-resolved fluorescence and pump-probe
experiments is always smaller than or at most equal to 2 5. From resonance Raman
experiments it is well known, however, that the anisotropy can range anywhere from 1 to− 1 …

Ultrafast pump–probe measurements on the electron donor–acceptor complex of
tetracyanoethylene with hexamethylbenzene in polar and nonpolar solvents are reported.
Ground state coherence in the complex stretching mode at 165 cm− 1 excited by impulsive …

Coherent vibrational wave packet motion is created in the excited charge‐transfer state of
the electron donor–acceptor complex between tetracyanoethylene (TCNE) and pyrene by
an ultrashort (40 fs) 810 nm pump pulse. Observations of the dynamics of the TCNE–anion …

This paper discusses the use of ultrafast time-resolved IR spectroscopy to probe vibrational
modes that are coupled to photochemically induced reactions. A detailed theory is derived
that describes the IR probe signals in three different schemes: pulsed-pump, pulsed-probe …

In a recent theoretical treatment of coherence effects in the anisotropy of optical
experiments, it was predicted that the decay of the anisotropy that exists for molecules with
degenerate states prior to the onset of electronic dephasing could be utilized to measure …

Abstract The low-frequency (1–200 cm− 1) vibrational spectra of peptides and proteins in
solution have been investigated with ultrafast optical heterodyne-detected Raman-induced
Kerr-effect spectroscopy (OHD-RIKES). Spectra have been obtained for di-L-alanine (ALA …

Low-frequency (terahertz) motions that play an important part in reactive processes in
condensed phases are directly probed, following an optical excitation. A voltage-biased
semiconductor wafer, excited with a 70 femtosecond laser pulse, is employed as a source …

The second-order processes of optical-rectification and photoconduction are well known
and widely used to produce ultrafast electromagnetic pulses in the terahertz frequency
domain. We present a new form of rectification that relies on the excitation of surface …