Coherent optical control of the spin of a single hole in an InAs/GaAs quantum dot.
We demonstrate coherent optical control of a single hole spin confined to an InAs/GaAs quantum dot. A superposition of hole-spin states is created by fast (10-100 ps) dissociation of a spin-polarized electron-hole pair. Full control of the hole spin is achieved by combining coherent rotations about two axes: Larmor precession of the hole spin about an external Voigt geometry magnetic field, and rotation about the optical axis due to the geometric phase shift induced by a picosecond laser pulse resonant with the hole-trion transition.
Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH, United Kingdom.
T M
TM
Godden
J H
JH
Quilter
A J
AJ
Ramsay
Yanwen
Y
Wu
P
P
Brereton
S J
SJ
Boyle
I J
IJ
Luxmoore
J
J
Puebla-Nunez
A M
AM
Fox
M S
MS
Skolnick