Physical Review Letters · 2005 · 50 citations · 18 references
Natural SciencesPhysicsOpticsQuantum MechanicsSpectroscopyElectron MicroscopyInterferometryQuantum MeasurementQuantum OpticsElectron Beam OpticsElectron Plasma WavesInterferometric MeasurementOptical InterferometersQuantum PhaseTwo-dimensional Electron GasesTwo-dimensional Electron Systems
An imaging interferometer was created in a two-dimensional electron gas by reflecting electron waves emitted from a quantum point contact 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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Coherent branched flow in a two-dimensional electron gas
Imaging Coherent Electron Flow from a Quantum Point Contact
M. A. Topinka, Brian J. LeRoy, S. E. J. Shaw et al. · Science · 2000 · 390 citations
Subsurface charge accumulation imaging of a quantum Hall liquid