High-energy attosecond-width electron diffraction simulations
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Date
2013-04-22
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Vanderbilt University. Department of Physics and Astronomy
Abstract
Electron microscopy has been the recent subject of molecular imaging
due to the strength of the electrons' interaction with the target
molecule making for a detailed pattern at a small scale.[1] To achieve
the best 4D image of the target, one needs sufficient
spatial and temporal resolution, the prior being an issue of using
electrons in the keV regime as to achieve an optimally small deBroglie
wavelength, and the latter being improved by the temporal width of the
electron wave packet itself.[2] In order to image the motion of the
electronic structure of the target molecule, this width must be within
the attosecond regime. In this paper, we use the computational method
of time-dependent density functional theory (TDDFT) to model our
targets of Beryllium and the Nitrogen molecule, N2 , and an incoming
electron wave packet with an energy of 1500 eV.
Description
Keywords
attosecond, electron microscopy, density functional theory, nitrogen molecule