Department of Physics Colloquium

Guest speaker: Patanjali Kambhampati, McGill University
jeudi, 8 novembre 2018 - 2:45 pm3:45 pm
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Title: Surface Science on the Nanoscale and Optical Analogs of 2D-NMR Abstract: To be discussed are two new directions in our research group that have emerged from a decade of work on ultrafast exciton dynamics in semiconductor nanocrystals. In both cases we connect classical ideas in physical chemistry to new opportunities in materials science: By virtue of their small size, these semiconductor nanocrystals also have pronounced surface effects. We report here on recent chemical and spectroscopic work that reveals how the surface of semiconductor nanocrystals may be understood, controlled, and exploited. Coherent Multidimensional Spectroscopy experiments, can be considered as optical analogs to 2D-NMR, albeit with complex beam geometries. Our recent work using laser pulse shaping approaches shows how one can create femtosecond laser pulse trains that are suitably modulated in an automated and programmable manner so as to enable CMDS in a fully collinear approach using all-optical readout. Refreshments will be served at 2:15 p.m. in room ARC 233.