Journal
PHYSICAL REVIEW LETTERS
Volume 98, Issue 4, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.98.046801
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Funding
- EPSRC [EP/D008506/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D008506/1] Funding Source: researchfish
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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.
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