Near-field strong coupling of single quantum dots

Strong coupling and resultant mixing of light and matter states is an important asset for future quantum technologies. Here we demonstrate deterministic room-temperature strong coupling of a mesoscopic colloidal quantum dot to a plasmonic nano resonator at the apex of a scanning probe. Enormous Rabi splittings of up to 110meV 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 towards ultrafast coherent manipulation of the coupled quantum dot-plasmon system at ambient conditions

Hybrid nanoparticles based on sulfides, oxides, and carbides

The methods for synthesis of hybrid nanoparticles based on sulfides, oxides, and carbides of heavy and transition metals were considered. The problem of the influence of the method of synthesis of the hybrid nanoparticles on their atomic structure, morphology of the nanomaterials, and functional properties was analyzed. The areas of practical use of the hybrid nanoparticles were proposed. © 2013 Springer Science+Business Media New York

Single Donor-Acceptor Pairs as a Tool for Studying Conformational Dynamics of Proteins and Other Macromolecules

Influence of triplet states in donor and acceptor molecules on function E(RDA) describing dependence of FRET efficiency E on inter-dye distance RDA is considered. Formula for E(RDA) differs from conventional equation used widely in practice and it shows that triplet states hampers energy transfer in D-A pair, considerably