Dresden 2011 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 17: Topical Session TEM V

MM 17.3: Talk

Tuesday, March 15, 2011, 14:45–15:00, IFW A

Inelastic Electron holography : First results with surface plasmons — •Roeder Falk and Lichte Hannes — Triebenberg Labor, Institute for Structure Physics, TU Dresden, 01062 Dresden, Germany

Inelastic interaction and wave optics seem to be incompatible in that inelastic processes destroy coherence, which is the fundamental requirement for holography. In special experiments it is shown that energy transfer larger than some undoubtedly destroys coherence of the inelastic electron with the elastic remainder. Consequently, the usual inelastic processes, such as phonon-, plasmon- or inner shell-excitations with energy transfer of several out to several , certainly produce incoherence with the elastic ones. However, it turned out that within the inelastic wave, *newborn* by the inelastic process, there is a sufficiently wide area of coherence for generating *inelastic holograms*. This is exploited to create holograms with electrons scattered at surface-plasmons, which opens up quantum mechanical investigation of these inelastic processes. P.L. Potapov, H. Lichte, J. Verbeeck and D. van Dyck, Ultramicroscopy 106(2006) 1012. These investigations have been performed within European Union Framework 6, Integrated Infrastructure, Reference 026019 ESTEEM.