Fringe contrast in inelastic LACBED holography

Planar diffracted-beam interferometry/holography

“…More recently, higher scattering angles (s41) have been used for these measurements where the diffuse intensity is believed to be dominated by TDS or phononscattered electrons [25]. These results are now being further investigated using the mixed dynamic form factor applied to electron energy-loss interference [26].…”

“…The absence of fringes inside the highintensity area is not well understood at the moment although attempts are being made to simulate it [26]. The absence of fringes in the center may be due to an increase in the apparent source size of the electrons, i.e., increased R s , since a planar beam on the diffraction plane sees a large electron source on the image plane, whereas a convergent beam on the diffraction plane sees a small electron source on the image plane.…”

“…Attempts were made by convergent DBI/H to measure the plasmon's d. It was believed that these measurements had a flaw though as revealed by the theoretical models of Schattschneider and Jouffrey [14] and Verbeeck et al [15] and illustrated in the simulations of convergent DBI/H by Verbeeck [11]. These simulations did not account for a defocus phase factor, which has been recently found to alter the analysis such that convergent DBI/H is now believed to be able to measure the coherence properties of plasmons [16]. The apparent flaw involved the use of ''convergent'' diffracted beams, which broadened the intensity of the electrons that originate from the fieldemitting source onto the diffraction plane such that the intensity of the plasmon-loss electrons, which originate from the specimen, on the diffraction plane was obscured.…”

Energy-filtered transmission electron microscopy based on inner-shell ionization

“…Moreover, very specific site information about the atom is now encoded in the further elastic scattering that occurs. Nevertheless, because further scattering occurs and the inelastic wave function is always able to self-interfere, even in this limit it is possible for interference effects to manifest in the final image [47].…”

Real space maps of atomic transitions

“…We have expressed the z dependence explicitly in preparation for the next step. The inelastic scattering kernel T can be written in configuration space as the convolution of the mixed dynamic form factor (MDFF) [4] S with the Coulomb coupling field [24] R À1 ¼ 1=jRj where R is the configuration space vector R ¼ ðx; zÞ…”