Near-field strong coupling of single quantum dots
Open Access
- 2 March 2018
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science Advances
- Vol. 4 (3), eaar4906
- https://doi.org/10.1126/sciadv.aar4906
Abstract
Strong coupling and the resultant mixing of light and matter states is an important asset for future quantum technologies. We demonstrate deterministic room temperature strong coupling of a mesoscopic colloidal quantum dot to a plasmonic nanoresonator at the apex of a scanning probe. Enormous Rabi splittings of up to 110 meV are accomplished by nanometer-precise positioning of the quantum dot with respect to the nanoresonator probe. We find that, in addition to a small mode volume of the nanoresonator, collective coherent coupling of quantum dot band-edge states and near-field proximity interaction are vital ingredients for the realization of near-field strong coupling of mesoscopic quantum dots. The broadband nature of the interaction paves the road toward ultrafast coherent manipulation of the coupled quantum dot-plasmon system under ambient conditions.Keywords
Funding Information
- Air Force Office of Scientific Research
- Engineering and Physical Sciences Research Council (EP/L024926/1)
- Deutsche Forschungsgemeinschaft (HE5618/1-1)
- Deutsche Forschungsgemeinschaft (HE 5618/6-1)
- European Office of Aerospace Research and Development
- Reinhart Koselleck-project
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