Ultrafast Carrier Dynamics

Time-resolved THz spectroscopy has served as a powerful tool for studying charge carrier dynamics in semiconductors over the past decades, since the THz energy range is sensitive to the response of charge quasiparticles (e.g., free carriers, polarons, and excitons) and optical phonon resonances. Not only it is contact-free and noninvasive approach in probing the complex conductivity, but also it allows for monitoring the nonequilibrium time evolution of carriers and low-energy excitations with sub-ps time resolution. We are interested in revealing conduction mechanism and charge carrier/dipolar species dynamics of new materials including superatom solids in condensed phase systems.