Fast optical preparation, control, and readout of a single quantum dot spin.
We propose and demonstrate the sequential initialization, optical control, and readout of a single spin trapped in a semiconductor quantum dot. Hole spin preparation is achieved through ionization of a resonantly excited electron-hole pair. Optical control is observed as a coherent Rabi rotation between the hole and charged-exciton states, which is conditional on the initial hole spin state. The spin-selective creation of the charged exciton provides a photocurrent readout of the hole spin state.
Department of Physics and Astronomy, University of Sheffield, Sheffield, UK. a.j.ramsay@shef.ac.uk
A J
AJ
Ramsay
S J
SJ
Boyle
R S
RS
Kolodka
J B B
JB
Oliveira
J
J
Skiba-Szymanska
H Y
HY
Liu
M
M
Hopkinson
A M
AM
Fox
M S
MS
Skolnick