Cavity-enhanced simultaneous dressing of quantum dot exciton and biexciton states

We demonstrate the simultaneous dressing of both vacuum-to-exciton and exciton-to-biexciton transitions of a single semiconductor quantum dot in a high-Q micropillar cavity, using photoluminescence spectroscopy. Resonant two-photon excitation of the biexciton is achieved by spectrally tuning the qua...

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Bibliographic Details
Published in:Physical review. B 2016-03, Vol.93 (11), Article 115308
Main Authors: Hargart, F., Müller, M., Roy-Choudhury, K., Portalupi, S. L., Schneider, C., Höfling, S., Kamp, M., Hughes, S., Michler, P.
Format: Article
Language:English
Subjects:
Condensed matter
Dressing
Emission spectroscopy
Excitation
Holes
Mathematical analysis
Qunatum dots
Semiconductors
Spectral emissivity
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Summary:We demonstrate the simultaneous dressing of both vacuum-to-exciton and exciton-to-biexciton transitions of a single semiconductor quantum dot in a high-Q micropillar cavity, using photoluminescence spectroscopy. Resonant two-photon excitation of the biexciton is achieved by spectrally tuning the quantum dot emission with respect to the cavity mode. The cavity couples to both transitions and amplifies the Rabi frequency of the likewise resonant continuous wave laser, driving the transitions. We observe strong-field splitting of the emission lines, which depend on the driving Rabi field amplitude and the cavity-laser detuning. A dressed state theory of a driven 4-level atom correctly predicts the distinct spectral transitions observed in the emission spectrum, and a detailed description of the emission spectra is further provided through a polaron master equation approach which accounts for cavity coupling and acoustic phonon interactions of the semiconductor medium.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.93.115308