title: Imaging electron interferometer.
abstract: 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.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: B J
authors.initials: BJ
authors.lastname: LeRoy
authors.forename: A C
authors.initials: AC
authors.lastname: Bleszynski
authors.forename: K E
authors.initials: KE
authors.lastname: Aidala
authors.forename: R M
authors.initials: RM
authors.lastname: Westervelt
authors.forename: A
authors.initials: A
authors.lastname: Kalben
authors.forename: E J
authors.initials: EJ
authors.lastname: Heller
authors.forename: S E J
authors.initials: SE
authors.lastname: Shaw
authors.forename: K D
authors.initials: KD
authors.lastname: Maranowski
authors.forename: A C
authors.initials: AC
authors.lastname: Gossard