Ultrafast optical parametric amplifiers (OPAs) can provide, under suitable conditions, ultra-
broad gain bandwidths and can thus be used as effective tools for the generation of widely …

One of the most advanced frontiers of ultrafast optics is the control of carrier‐envelope phase
(CEP) ϕ of light pulses, which enables the generation of optical waveforms with …

Optical parametric amplifiers (OPAs) exploit second-order nonlinearity to transfer energy
from a fixed frequency pump pulse to a variable frequency signal pulse, and represent an …

In biological complexes, cascade structures promote the spatial separation of
photogenerated electrons and holes, preventing their recombination. In contrast, the …

Singlet exciton fission (SF), the conversion of one spin-singlet exciton (S1) into two spin-
triplet excitons (T1), could provide a means to overcome the Shockley–Queisser limit in …

Singlet exciton fission is the spin-conserving transformation of one spin-singlet exciton into
two spin-triplet excitons. This exciton multiplication mechanism offers an attractive route to …

Singlet exciton fission allows the fast and efficient generation of two spin triplet states from
one photoexcited singlet. It has the potential to improve organic photovoltaics, enabling …

Singlet exciton fission is a spin-allowed process to generate two triplet excitons from a single
absorbed photon. This phenomenon offers great potential in organic photovoltaics, but the …

We present an ultrafast transient absorption spectroscopy system in the visible combining
high-sensitivity broadband detection with extreme temporal resolution. The instrument is …

The nanoscale morphology and high charge densities in organic photovoltaics (OPVs) lead
to a high rate of bimolecular encounters between spin-uncorrelated electrons and holes …