Ultrafast Physics in One Dimension

Susan L. Dexheimer
Department of Physics and Materials Science Program
Washington State University

Low dimensional materials, and in particular, quasi-one-dimensional systems have attracted considerable interest owing to their unusual electronic properties.  In many of these systems, strong electron-phonon couplings can lead to the formation of nonlinear excitations such as self-trapped excitons, in which an electronic excitation is localized as a result of lattice distortions that occur in response to the excitation.  I will present our recent results on femtosecond time-resolved experiments in which we have studied the electronic and vibrational dynamics associated with the formation and evolution of the self-trapped exciton in mixed-valence metal-halide linear chain (MX) complexes.