title: Quantum Confinement Regimes in CdTe Nanocrystals Probed by Single Dot Spectroscopy: From Strong Confinement to the Bulk Limit.
abstract: Sufficiently large semiconductor nanocrystals are a useful model system to characterize bulk-like excitons, with the electron and hole bound predominantly by Coulomb interaction. We present optical characterization of excitons in individual giant CdTe nanocrystals with diameters up to 25.5 nm at 4.2 K under varying excitation power and magnetic field strength. We determine values for the biexciton binding energy, diamagnetic shift constant, and Landé g-factor, which approach the bulk values with increasing nanocrystal size.
authors.affiliation: Schulich Faculty of Chemistry, Russell Berrie Nanotechnology Institute, Solid State Institute, Technion-Israel Institute of Technology , Haifa 32000, Israel.
authors.forename: Jenya
authors.initials: J
authors.lastname: Tilchin
authors.affiliation: Debye Institute of Nanomaterials Science, University of Utrecht , Utrecht 3508 TA, The Netherlands.
authors.forename: Freddy T
authors.initials: FT
authors.lastname: Rabouw
authors.affiliation: Schulich Faculty of Chemistry, Russell Berrie Nanotechnology Institute, Solid State Institute, Technion-Israel Institute of Technology , Haifa 32000, Israel.
authors.forename: Maya
authors.initials: M
authors.lastname: Isarov
authors.affiliation: Schulich Faculty of Chemistry, Russell Berrie Nanotechnology Institute, Solid State Institute, Technion-Israel Institute of Technology , Haifa 32000, Israel.
authors.forename: Roman
authors.initials: R
authors.lastname: Vaxenburg
authors.affiliation: Debye Institute of Nanomaterials Science, University of Utrecht , Utrecht 3508 TA, The Netherlands.
authors.forename: Relinde J A
authors.initials: RJ
authors.lastname: Van Dijk-Moes
authors.affiliation: Schulich Faculty of Chemistry, Russell Berrie Nanotechnology Institute, Solid State Institute, Technion-Israel Institute of Technology , Haifa 32000, Israel.
authors.forename: Efrat
authors.initials: E
authors.lastname: Lifshitz
authors.affiliation: Debye Institute of Nanomaterials Science, University of Utrecht , Utrecht 3508 TA, The Netherlands.
authors.forename: Daniel
authors.initials: D
authors.lastname: Vanmaekelbergh
keywords: exciton localization; multiexcitons; semiconductor quantum dots; weak quantum confinement