Event Details

Condensed Matter Webinar

The THz frequency range (0.1-10 THz) provides the perfect non-contact probe for investigating the electronic properties of advanced functional materials. The alternating THz field stimulates the motion of several typical quasiparticles, including free electrons and holes, plasmons, excitons and magnons, and can also excite collective excitations (eg. optical phonons). Its frequency range is on the same order of magnitude as typical charge carrier scattering rates in inorganic semiconductors, making it sensitive to the electrical conductivity of a material. Consequently, THz spectroscopy has emerged as a powerful tool for direct extraction of the frequency-dependent complex dielectric function and AC conductivity. This talk demonstrates the use of THz spectroscopy to extract key optoelectronic properties (e.g. carrier mobility and lifetime) of low-dimensional materials, such as semiconductor nanowires, on sub-picosecond timescales and with nanometre (<30 nm) spatial resolution.

If you have not received a Teams link for this event and would like to attend, please contact Dr. Michael Thompson.