Beating of exciton-dressed states in a single semiconductor InGaAs/GaAs quantum dot.
We report picosecond control of excitonic dressed states in a single semiconductor quantum dot. A strong laser pulse couples the exciton and biexciton states, to form an Autler-Townes doublet of the neutral exciton transition. The Rabi-splitting, and hence the admixture of the dressed states follows the envelope of the picosecond control laser. We create a superposition of dressed states, and observe the resulting beat: a direct measurement of a Rabi oscillation in time delay rather than the usual power domain.
Boyle
S J
SJ
Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH, United Kingdom.
Ramsay
A J
AJ
Fox
A M
AM
Skolnick
M S
MS
Heberle
A P
AP
Hopkinson
M
M