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Proceedings Paper

Up on the Jaynes-Cummings ladder of an exciton-cavity system
Author(s): J. Kasprzak; S. Reitzenstein; E. A. Muljarov; C. Kistner; C. Schneider; M. Strauss; S. Höfling; A. Forchel; W. Langbein
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Paper Abstract

Light and matter can be unified under the strong coupling regime, creating superpositions of both, called dressed states or polaritons. After initially being demonstrated in bulk semiconductors and atomic systems ,strong coupling phenomena have been realized in solid state optical microcavities. They form an essential ingredient in the exciting physics spanning from many-body quantum coherence phenomena, like Bose-Einstein condensation and superfluidity, to cavity quantum electrodynamics (cQED). A widely used approach within cQED is the Jaynes-Cummings (JC) model that describes the interaction of a single fermionic two-level system with a single bosonic photon mode. For a photon number larger than one, known as quantum strong coupling (QSC), a significant anharmonicity is predicted for the ladder-like spectrum of dressed states. For optical transitions in semiconductor nanostructures, first signatures of the quantum strong coupling were recently published. In our latest report we applied advanced coherent nonlinear spectroscopy to explore a strongly coupled exciton-cavity system. Specifically, we measured and simulated its four-wave mixing (FWM) response, granting direct access to the first two rungs of the JC ladder. This paper summarizes the main results of Ref. 15 and adds FWM experiments obtained on a micropillar cavity in which a doublet of quantum dot (QD) excitons interacts with the cavity mode in the limit of weak to strong coupling.

Paper Details

Date Published: 1 March 2010
PDF: 9 pages
Proc. SPIE 7600, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV, 760015 (1 March 2010); doi: 10.1117/12.838372
Show Author Affiliations
J. Kasprzak, Cardiff Univ. (United Kingdom)
S. Reitzenstein, Univ. Würzburg (Germany)
E. A. Muljarov, Cardiff Univ. (United Kingdom)
C. Kistner, Univ. Würzburg (Germany)
C. Schneider, Univ. Würzburg (Germany)
M. Strauss, Univ. Würzburg (Germany)
S. Höfling, Univ. Würzburg (Germany)
A. Forchel, Univ. Würzburg (Germany)
W. Langbein, Cardiff Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 7600:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV
Jin-Joo Song; Kong-Thon Tsen; Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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