Many important molecular systems are made out of assemblies of coupled localized
chromophores. Examples are molecular crystals, 1-3 J aggregates, 4-8 biological light …

The application of femtosecond spectroscopy to the study of ultrafast dynamics in
semiconductor materials and nanostructures is reviewed with particular emphasis on the …

Whenever a physicist visits the physics faculty in Dortmund, he/she is bound to hear the
success story of the so-called integrated course, a four-semester introduction to physics …

Solids consist of 1022–1023 particles per cubic centimetre, interacting through infinite-range
Coulomb interactions. The linear response of a solid to a weak external perturbation is well …

Differential absorption spectra of high-quality InGaAs quantum wells are presented for
various pump detunings and polarization configurations. For low intensity pump pulses …

The coherent optical response of semiconductors has been the subject of substantial
research over the last couple of decades. The interest has been motivated by unique …

The spin dynamics in Ni is studied by an exact diagonalization method on the ultrafast time
scale. It is shown that the femtosecond relaxation of the magneto-optical response results …

A unified description of nonlinear optical spectroscopies of molecular aggregates (starting
with the Frenkel-Heitler-London Hamiltonian) and semiconductors (starting with the two …

The conventional demagnetization process (spin precession, magnetic domain motion and
rotation) is governed mainly by spin—lattice, magnetic dipole and Zeeman, and spin-spin …

A detailed numerical analysis of exciton-exciton interactions in semiconductor quantum
wells is presented. The theory is based on the dynamics-controlled truncation formalism and …