10.6084/M9.FIGSHARE.C.4245947
Wigger, Daniel
Daniel
Wigger
Schneider, Christian
Christian
Schneider
Gerhardt, Stefan
Stefan
Gerhardt
Kamp, Martin
Martin
Kamp
Höfling, Sven
Sven
Höfling
Kuhn, Tilmann
Tilmann
Kuhn
Kasprzak, Jacek
Jacek
Kasprzak
Bloch vector Rabi oscillation dynamics of a single quantum dot exciton coupled to acoustic phonons
Figshare
2018
Collection
Uncategorized
2018-09-26
2018-11-06
2018
10.1364/optica.5.001442
CC BY 4.0
While the advanced coherent control of qubits is now routinely carried out in low frequency (GHz) systems like single spins, it is far more challenging to achieve for two-level systems in the optical domain. This is because the latter evolve typically in the THz range, calling for tools of ultrafast, coherent, nonlinear optics. Using four-wave mixing micro-spectroscopy, we here measure the optically driven Bloch vector dynamics of a single exciton confined in a semiconductor quantum dot. In a combined experimental and theoretical approach, we reveal the intrinsic Rabi oscillation dynamics by monitoring both central exciton quantities, i.e., its occupation and the microscopic coherence, as resolved by the four-wave mixing technique. In the frequency domain this oscillation generates the Autler-Townes splitting of the light-exciton dressed states, directly seen in the four-wave mixing spectra. We further demonstrate that the coupling to acoustic phonons strongly influences the FWM dynamics on the picosecond timescale, because it leads to transitions between the dressed states.