Single electron charging in optically active nanowire quantum dots.
We report optical experiments of a charge tunable, single nanowire quantum dot subject to an electric field tuned by two independent voltages. First, we control tunneling events through an applied electric field along the nanowire growth direction. Second, we modify the chemical potential in the nanowire with a back-gate. We combine these two field-effects to isolate a single electron and independently tune the tunnel coupling of the quantum dot with the contacts. Such charge control is a first requirement for opto-electrical single electron spin experiments on a nanowire quantum dot.
van Kouwen
Maarten P
MP
Kavli Institute of Nanoscience, Delft, The Netherlands.
Reimer
Michael E
ME
Hidma
Anne W
AW
van Weert
Maarten H M
MH
Algra
Rienk E
RE
Bakkers
Erik P A M
EP
Kouwenhoven
Leo P
LP
Zwiller
Val
V
D004579:Electron Transport; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D055096:Optical Devices; D010316:Particle Size; D045663:Quantum Dots; D012666:Semiconductors; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*