Quantum nature of a strongly coupled single quantum dot–cavity system

K. Hennessy, A. Badolato, M. Winger, D. Gerace, M. Atatüre, S. Gulde, S. Fält, E. L. Hu and A. Imamoğlu ()
Additional contact information
K. Hennessy: Institute of Quantum Electronics, ETH Zürich, HPT G10, 8093 Zurich, Switzerland
A. Badolato: Institute of Quantum Electronics, ETH Zürich, HPT G10, 8093 Zurich, Switzerland
M. Winger: Institute of Quantum Electronics, ETH Zürich, HPT G10, 8093 Zurich, Switzerland
D. Gerace: Institute of Quantum Electronics, ETH Zürich, HPT G10, 8093 Zurich, Switzerland
M. Atatüre: Institute of Quantum Electronics, ETH Zürich, HPT G10, 8093 Zurich, Switzerland
S. Gulde: Institute of Quantum Electronics, ETH Zürich, HPT G10, 8093 Zurich, Switzerland
S. Fält: Institute of Quantum Electronics, ETH Zürich, HPT G10, 8093 Zurich, Switzerland
E. L. Hu: California NanoSystems Institute, University of California, Santa Barbara, California 93106, USA
A. Imamoğlu: Institute of Quantum Electronics, ETH Zürich, HPT G10, 8093 Zurich, Switzerland

Nature, 2007, vol. 445, issue 7130, 896-899

Abstract: On quantum nature Cavity quantum electrodynamics (QED) studies the interaction between a quantum emitter (for example an atom or a quantum dot) and a single mode from a radiation field. When the two are strongly coupled it is possible to realize key quantum information processing tasks. In the solid state this could be achieved by coupling semiconductor quantum dots to optical microcavities. However, validating the efficacy of quantum dots in quantum information applications requires confirmation of the quantum nature of the quantum-dot–cavity system in the strong coupling regime. A collaboration between labs at ETH Zurich and the University of California, Santa Barbara, now provides this sought-after confirmation. The experiments involve a photonic crystal nanocavity in which one, and only one, quantum dot is located precisely at the cavity electric field maximum.

Date: 2007
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DOI: 10.1038/nature05586

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