We use ultrafast transient absorption and two-dimensional electronic spectroscopy experiments to interrogate excited state dynamics, including energy transfer, charge transfer, and vibrational relaxation. Transient absorption spectroscopy allows quantitative determination of kinetics on the femto- to picosecond timescale. In parallel, we overcome the limitations associated with narrow spectral bandwidths by introducing a sub-10 fs, ultrabroadband laser spectrum to our two-dimensional electronic spectroscopy (2DES) apparatus, which encompasses the entire visible range (450-800 nm). Ultrabroadband 2DES can be applied to uncover previously inaccessible dynamics of energy flow in a wide variety of condensed-phase systems, including natural and artificial light harvesting systems as well as organic and inorganic nanomaterials.
M. Son, S. Mosquera-Vasquez, G. S. Schlau-Cohen, "Ultrabroadband 2D electronic spectroscopy with high-speed, shot-to-shot detection." Opt Express, 25, 18950 (2017).
Group Members: Minjung, Ashley, Olivia, Steph