Imaging Electron Interferometer

Details Imaging Electron Interferometer Imaging Electron Interferometer

2005-02-23

arxiv.org/abs/cond-mat/0502544v1

Phys. Rev. Lett., 94 126801 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, 4 figures, to appear in Phys. Rev. Lett. Movies associated with this paper at http://www.mb.tn.tudelft.nl/user/brian

Scientific paper

10.1103/PhysRevLett.94.126801

An imaging interferometer was created in a two-dimensional electron gas by reflecting electron waves emitted from a quantum point contact (QPC) with a circular mirror. Images of electron flow obtained with a scanning probe microscope at liquid He temperatures show interference fringes when the mirror is energized. A quantum phase shifter was created by moving the mirror via its gate voltage, and an interferometric spectrometer can be formed by sweeping the tip over many wavelengths. Experiments and theory demonstrate that the interference signal is robust against thermal averaging.

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