We use ultrafast spectroscopy to interrogate the dynamics of electronic excited states, including energy transfer, charge transfer, and vibrational relaxation.
2D spectrum of LHCII using ultrabroadband 2D electronic spectroscopy, which spans both chlorophyll and carotenoid transitions.
We have introduced a version of ultrabroadband 2D electronic spectroscopy that spans the visible range with high-sensitivity, shot-to-shot detection. Ultrabroadband 2D electronic spectroscopy can be applied to uncover previously inaccessible dynamics of energy flow in a wide variety of condensed-phase systems on the femtosecond to picosecond timescale.
We also use one-dimensional transient absorption and transient grating spectroscopy for quantitative determination of kinetics and vibronic coherences. These techniques allow us to probe electronic excited states, including energy transfer, charge separation, and vibrational relaxation pathways. With these sophisticated optical tools, we are able to map out the photophysical pathways that underlie light harvesting, imaging, and chemical conversion.