We are interested in exploring light matter interactions within and between nanoscale systems. In particular, we are interested in understanding the excitonic energy transport following photon absorption. Excitons play an essential role for energy transport in natural processes such as photosynthesis as well as in nanostructured optoelectronic devices such as photovoltaics and light-emitting diodes based on molecular solids such as organics, colloidal quantum dots, etc. Understanding and manipulating the transport of excitons in such systems can not only enhance the device performance, but also lead to the development of next-generation technologies.
The work uses different characterization tools such as space-time diffusion visualization technique developed previously at MIT, near field imaging and advanced optical spectroscopy techniques. Part of the research is also dedicated in developing new techniques to understand the energy dynamics at nanoscale.