Quantum dot spectroscopy using cavity quantum electrodynamics

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 charg...

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Bibliographic Details
Published inPhysical review letters Vol. 101; no. 22; p. 226808
Main Authors Winger, Martin, Badolato, Antonio, Hennessy, Kevin J, Hu, Evelyn L, Imamoğlu, Ataç
Format Journal Article
LanguageEnglish
Published United States 28.11.2008
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Summary: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 microeV.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.101.226808