Single-electron population and depopulation of an isolated quantum dot using a surface-acoustic-wave pulse

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Single-electron population and depopulation of an isolated quantum dot using a surface-acoustic-wave pulse

Kataoka, M; Schneble, RJ; Thorn, AL; Barnes, CHW; Ford, CJB; Anderson, D; Jones, GAC; ... Pepper, M; + view all (2007) Single-electron population and depopulation of an isolated quantum dot using a surface-acoustic-wave pulse. PHYS REV LETT , 98 (4) , Article 046801. 10.1103/PhysRevLett.98.046801. Green open access

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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 similar to 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.

Type:	Article
Title:	Single-electron population and depopulation of an isolated quantum dot using a surface-acoustic-wave pulse
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1103/PhysRevLett.98.046801
Publisher version:	http://dx.doi.org/10.1103/PhysRevLett.98.046801
Language:	English
Additional information:	© 2007 The American Physical Society
Keywords:	CHANNEL
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI:	https://discovery.ucl.ac.uk/id/eprint/1314452