title: Single-electron population and depopulation of an isolated quantum dot using a surface-acoustic-wave pulse.
abstract: We use a pulse of surface acoustic waves (SAWs) to control the electron population and depopulation of a quantum dot. The barriers between the dot and reservoirs are set high to isolate the dot. Within a time scale of approximately 100 s the dot can be set to a nonequilibrium charge state, where an empty (occupied) level stays below (above) the Fermi energy. A pulse containing a fixed number of SAW periods is sent through the dot, controllably changing the potential, and hence the tunneling probability, to add (remove) an electron to (from) the dot.
authors.affiliation: Cavendish Laboratory, J.J. Thompson Avenue, Cambridge CB3 0HE, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Kataoka
authors.forename: R J
authors.initials: RJ
authors.lastname: Schneble
authors.forename: A L
authors.initials: AL
authors.lastname: Thorn
authors.forename: C H W
authors.initials: CH
authors.lastname: Barnes
authors.forename: C J B
authors.initials: CJ
authors.lastname: Ford
authors.forename: D
authors.initials: D
authors.lastname: Anderson
authors.forename: G A C
authors.initials: GA
authors.lastname: Jones
authors.forename: I
authors.initials: I
authors.lastname: Farrer
authors.forename: D A
authors.initials: DA
authors.lastname: Ritchie
authors.forename: M
authors.initials: M
authors.lastname: Pepper