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Inelastic electron holography – first results with surface plasmons

Published online by Cambridge University Press:  07 June 2011

F. Röder  and
H. Lichte
F. Röder
Affiliation:
Triebenberg Laboratory, Institute of Structure Physics, Technische Universität Dresden, 01062 Dresden, Germany
H. Lichte*
Affiliation:
Triebenberg Laboratory, Institute of Structure Physics, Technische Universität Dresden, 01062 Dresden, Germany
*
ae-mail: hannes.lichte@triebenberg.de

Abstract

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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 10-15 eV 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 meV out to several 10 eV, 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.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 54 , Issue 3: Focus on Recent advances in (S)TEM and related spectroscopies: a tribute to C. Colliex , June 2011 , 33504
Copyright
© EDP Sciences, 2011

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