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000454376 1001_ $$0P:(DE-HGF)0$$aEickhoff, K.$$b0
000454376 245__ $$aOrbital angular momentum superposition states in transmission electron microscopy and bichromatic multiphoton ionization
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000454376 520__ $$aThe coherent control of electron beams and ultrafast electron wave packet dynamics have attracted significant attention in electron microscopy as well as in atomic physics. In order to unify the conceptual pictures developed in both fields, we demonstrate the generation and manipulation of tailored electron orbital angular momentum (OAM) superposition states either by employing customized holographic diffraction masks in a transmission electron microscope or by atomic multiphoton ionization utilizing pulse-shaper generated carrier-envelope phase stable bichromatic ultrashort laser pulses. Both techniques follow similar physical mechanisms based on Fourier synthesis of quantum mechanical superposition states allowing the preparation of a broad set of electron states with uncommon symmetries. We describe both approaches in a unified picture based on an advanced spatial and spectral double slit and point out important analogies. In addition, we analyze the topological charge and discuss the control mechanisms of the free-electron OAM superposition states. Their generation and manipulation by phase tailoring in transmission electron microscopy and atomic multiphoton ionization is illustrated on a 7-fold rotationally symmetric electron density distribution.
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000454376 7001_ $$0P:(DE-HGF)0$$aRathje, C.$$b1
000454376 7001_ $$0P:(DE-HGF)0$$aKöhnke, D.$$b2
000454376 7001_ $$0P:(DE-H253)PIP1088295$$aKerbstadt, S.$$b3
000454376 7001_ $$aEnglert, L.$$b4
000454376 7001_ $$aBayer, T.$$b5
000454376 7001_ $$aSchäfer, S.$$b6
000454376 7001_ $$0P:(DE-H253)PIP1011405$$aWollenhaupt, M.$$b7$$eCorresponding author
000454376 773__ $$0PERI:(DE-600)1464444-7$$a10.1088/1367-2630/abbe54$$gVol. 22, no. 10, p. 103045 -$$n10$$p103045 $$tNew journal of physics$$v22$$x1367-2630$$y2020
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