Journal
SCIENCE ADVANCES
Volume 4, Issue 3, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aar4906
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Funding
- Engineering and Physical Sciences Research Council UK [EP/L024926/1]
- Air Force Office of Scientific Research
- European Office of Aerospace Research and Development
- German Research Foundation (DFG) [He5618/1-1]
- Reinhart Koselleck project
- Foundational Questions Institute [FQXi-RFP-1601]
- University of Nottingham via a Nottingham Research Fellowship
- EPSRC [EP/L024926/1] Funding Source: UKRI
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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.
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