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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
Single-electron population and depopulation of an isolated quantum dot using a surface-acoustic-wave pulse
M Kataoka1, R J Schneble, A L Thorn
1Cavendish Laboratory, J.J. Thompson Avenue, Cambridge CB3 0HE, United Kingdom.
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.
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