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Femtosecond low-energy electron diffraction and imaging

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Müller,  Melanie
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Paarmann,  Alexander
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Ernstorfer,  Ralph
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Müller, M., Paarmann, A., & Ernstorfer, R. (2014). Femtosecond low-energy electron diffraction and imaging. Talk presented at Ultrafast Nonlinear Imaging and Spectroscopy II. San Diego, CA, USA. 2014-08-18.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0023-CB36-0
Abstract
We present an experimental approach for the investigation of ultrafast structural dynamics in low-dimensional systems like two-dimensional materials, surfaces, and nanostructures. Time-resolved diffraction technique with low-energy electrons in the sub-kV range provides femtosecond temporal resolution and high surface sensitivity. Besides an operation mode for femtosecond low-energy electron diffraction (fs-LEED), the instrument also provides femtosecond point projection imaging (fs-PPI), which allows for mapping of transient electric fields and ultrafast currents in photoexcited nanostructures.