Quantum dot spectroscopy using cavity quantum electrodynamics

Winger, M., Badolato, A. , Hennessy, K. J., Hu, E. L. and Imamoğlu, A. (2008) Quantum dot spectroscopy using cavity quantum electrodynamics. Physical Review Letters, 101(22), 226808. (doi: 10.1103/PhysRevLett.101.226808)

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We show how cavity quantum electrodynamics using a tunable photonic crystal nanocavity in the strong-coupling regime can be used for single quantum dot spectroscopy. From the distinctive avoided crossings observed in the strongly coupled system we can identify the neutral and single positively charged exciton as well as the biexciton transitions. Moreover we are able to investigate the fine structure of those transitions and to identify a novel cavity mediated mixing of bright and dark exciton states, where the hyperfine interactions with lattice nuclei presumably play a key role. These results are enabled by a deterministic coupling scheme which allowed us to achieve unprecedented coupling strengths in excess of 150     μ eV .

Item Type:Articles
Glasgow Author(s) Enlighten ID:Badolato, Professor Antonio
Authors: Winger, M., Badolato, A., Hennessy, K. J., Hu, E. L., and Imamoğlu, A.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114
Published Online:25 November 2008

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