title: Detection of bright trion states using the fine structure emission of single CdSe/ZnS colloidal quantum dots.
abstract: We report direct observation of the lowest two states of the band-edge exciton fine structure in the photoluminescence from single CdSe/ZnS core/shell nanocrystals at cryogenic temperatures. The temperature dependence of this spectral fingerprint reveals exciton spin relaxation rates as low as 10 micros(-1). The fine structure is also dependent on the nanocrystal charge state facilitating the identification of a bright negatively charged trion state with a quantum yield comparable to that of neutral emission.
authors.affiliation: Centre for Quantum Computer Technology, School of Physical Sciences, The University of Queensland, Queensland, Australia. fernee@physics.uq.edu.au
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Fernée
authors.forename: Bradley N
authors.initials: BN
authors.lastname: Littleton
authors.forename: Halina
authors.initials: H
authors.lastname: Rubinsztein-Dunlop