Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.29: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1+2

Elements of a guided electron based quantum electron microscope — •Robert Zimmermann, Philipp Weber, and Peter Hommelhoff — Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen

This poster reports on the manipulation of free electrons using microwave electric fields applied to micro-structured chips. The working principle is the same as for the Paul trap, i.e. a microwave potential applied to electrodes causes an oscillating electric field by which the electrons can be guided [1]. Based on the first designs of a planar quadrupole guide [2][3] and of an electron beam splitter [4], we discuss the improved confinement from using two electrode chips. Lastly, the design of an electron resonator and its first experimental results are presented. In contrast to conventional electron optics, the transverse confinement naturally provides discretized motional quantum states that govern the electron motion. The goal is to employ these quantum states to show interaction-free measurements [5] with free electrons, which would pave the way for the development of the quantum electron microscope [6].

[1] W. Paul, Rev. Mod. Phys. 62, 531 (1990) [2] J. Hoffrogge, R. Fröhlich, M. A. Kasevich and P. Hommelhoff; Phys. Rev. Lett. 106, 193001 (2011) [3] J. Hoffrogge and P. Hommelhoff; New J. Phys. 13, 095012 (2011) [4] J. Hammer, et al.; Phys. Rev. Lett. 114, 254801 (2015) [5] P. Kwiat, et al.; Phys. Rev. Lett. 74, 4763 (1995) [6] W. P. Putnam and M. F. Yanik; Phys. Rev. a 80, 040902(R) (2009)