Physical Chemistry Seminar: Thomas Allison |Stony Brook University

Title: Imaging Exciton and Charge-Transfer Dynamics at Surfaces with Time-resolved Momentum Microscopy Abstract: Many of our current technological ambitions hinge on our ability to engineer and control the light-driven dynamics of energy, charge, and spin at the nanoscale. Prominent examples occur in the development of photovoltaics and photocatalysts, for the conversion of abundant sunlight into electrical power or chemical fuels, and the development of optoelectronics for information technology. The coherent manipulation of excited states also lies at the heart of emerging quantum information technology, in the context of quantum memories and quantum repeaters which work with photons as mobile qubits. The excited states created by optical excitation of matter are inherently complex, with many strongly-coupled degrees of freedom and dynamics occurring over a wide range of time and length scales. Ultrafast spectroscopy can in principle be used to dissect these complex interactions. How...