Imaging Electron Interferometer
LeRoy, B. J. · Bleszynski, A. C. · Aidala, K. E. · Westervelt, R. M. · Kalben, A. · Heller, E. J. · Shaw, S. E. J. · Maranowski, K. D. · Gossard, A. C.
Original · EN
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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