The role of optical excitation power on the emission spectra of a strongly coupled quantum dot-micropillar system.
A strongly coupled quantum dot-micropillar cavity system is studied under variation of the excitation power. The characteristic double peak spectral shape of the emission with a vacuum Rabi splitting of 85 microeV at low excitation transforms gradually into a single broad emission peak when the excitation power is increased. Modelling the experimental data by a recently published formalism [Laussy et al., Phys. Rev. Lett. 101, 083601 (2008)] yields a transition from strong coupling towards weak coupling which is mainly attributed to an excitation power driven decrease of the exciton-photon coupling constant.
Münch
S
S
Technische Physik, Physikalisches Institut, Universität Würzburg and Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Am Hubland, D-97074 Würzburg, Germany.
Reitzenstein
S
S
Franeck
P
P
Löffler
A
A
Heindel
T
T
Höfling
S
S
Worschech
L
L
Forchel
A
A
D015233:Models, Statistical; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D009991:Oscillometry / Q000379:methods; D017785:Photons; D010825:Physics / Q000379:methods; D045663:Quantum Dots; D013696:Temperature