We investigate the strong-coupling regime of a self-assembled quantum dot in a tunable
microcavity with dark-field laser spectroscopy. The high quality of the spectra allows the line
shapes to be analyzed revealing subtle quantum interferences. Agreement with a model
calculation is achieved only by including exciton dephasing which reduces the cooperativity
from a bare value of 9.0 to the time-averaged value 5.5. In the pursuit of high cooperativity,
besides a high Q and low mode-volume cavity, we demonstrate that equal efforts need to be …

… Abstract: We study single InGaAs quantum-dots within a tunable microcavity and observe a
large Rabi splitting and high cooperativity (5.5). The dynamics are limited by spectral wandering;
we propose an improved design towards ultrahigh cooperativity. … We present a new approach
here: we report the successful implementation of a spectrally and spatially tunable Fabry-Perot
type microcavity [4] to a single InGaAs self-assembled quantum dot and demonstrate a clear
signature of vacuum Rabi splitting. Further, we emphasize that the emitter’s dephasing rate is …