Open AccessThe role of optical excitation power on the emission spectra of a strongly coupled quantum dot-micropillar system
Author(s) -
S. Münch,
Stephan Reitzenstein,
P. Franeck,
Andreas Löffler,
Tobias Heindel,
Sven Höfling,
L. Worschech,
A. Forchel
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.012821
Subject(s) - excitation , exciton , quantum dot , atomic physics , physics , photon , emission spectrum , spontaneous emission , spectral line , coupling (piping) , quantum optics , molecular physics , optics , laser , materials science , condensed matter physics , optoelectronics , quantum mechanics , metallurgy
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.