Fast electrons and hard X-rays for unraveling charge carrier dynamics

by Dr Renske van der Veen (Dept. Atomic-Scale Dynamics in Light-Energy Conversion , HZB)

Tuesday 17 May 2022, 13:00 → 14:00 Europe/Berlin

XHQ / E1.173

The visualization and tracking of light-induced carrier and atomic dynamics on their inherent ultrafast time scales is of uttermost importance in a large range of fields, including photocatalysis, photovoltaics, optoelectronics, and plasma physics. Conventional characterization techniques either lack the spatial resolution necessary to resolve individual atoms, or they lack the temporal resolution required to capture the dynamics as they evolve. Our group develops complementary X-ray and electron-based tools to visualize light-induced processes on atomic length and time scales.  In this talk I will present our recent results on using transient X-ray linear dichroism to study carrier screening in heterostructured nanomaterials for solar energy applications, as well as using ultrafast electron microscopy to visualize the transient lensing from a photoemitted electron gas.The visualization and tracking of light-induced carrier and atomic dynamics on their inherent ultrafast time scales is of uttermost importance in a large range of fields, including photocatalysis, photovoltaics, optoelectronics, and plasma physics. Conventional characterization techniques either lack the spatial resolution necessary to resolve individual atoms, or they lack the temporal resolution required to capture the dynamics as they evolve. Our group develops complementary X-ray and electron-based tools to visualize light-induced processes on atomic length and time scales.  In this talk I will present our recent results on using transient X-ray linear dichroism to study carrier screening in heterostructured nanomaterials for solar energy applications, as well as using ultrafast electron microscopy to visualize the transient lensing from a photoemitted electron gas.

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https://xfel.zoom.us/j/92756701961pwd=cWxiSlBFZFJ2VG5oRlJ0THM2RXlNUT09

    Meeting ID: 927 5670 1961
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