title: Super-Poissonian statistics of photon emission from single CdSe-CdS core-shell nanocrystals coupled to metal nanostructures.
abstract: We demonstrate that photon antibunching observed for individual nanocrystal quantum dots (NQDs) can be transformed into photon bunching characterized by super-Poissonian statistics when they are coupled to metal nanostructures (MNs). This observation indicates that, while the quantum yield of a biexciton (Q(2X)) is lower than that of a single exciton (Q(1X)) in freestanding NQDs, Q(2X) becomes greater than Q(1X) in NQDs coupled to MNs. This unique phenomenon is attributed to metal-induced quenching with a rate that scales more slowly with exciton multiplicity than the radiative decay rate and dominates over other nonradiative decay channels for both single excitons and biexcitons.
authors.affiliation: Los Alamos National Laboratory, Chemistry Division, Los Alamos, New Mexico 87545, USA and Los Alamos National Laboratory, Materials Physics and Applications Division, Center for Integrated Nanotechnologies, Los Alamos, New Mexico 87545, USA.
authors.forename: Young-Shin
authors.initials: YS
authors.lastname: Park
authors.affiliation: Los Alamos National Laboratory, Materials Physics and Applications Division, Center for Integrated Nanotechnologies, Los Alamos, New Mexico 87545, USA.
authors.forename: Yagnaseni
authors.initials: Y
authors.lastname: Ghosh
authors.affiliation: Los Alamos National Laboratory, Chemistry Division, Los Alamos, New Mexico 87545, USA and Los Alamos National Laboratory, Materials Physics and Applications Division, Center for Integrated Nanotechnologies, Los Alamos, New Mexico 87545, USA.
authors.forename: Yongfen
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Los Alamos National Laboratory, Theory Division, Los Alamos, New Mexico 87545, USA.
authors.forename: Andrei
authors.initials: A
authors.lastname: Piryatinski
authors.affiliation: Los Alamos National Laboratory, Chemistry Division, Los Alamos, New Mexico 87545, USA.
authors.forename: Ping
authors.initials: P
authors.lastname: Xu
authors.affiliation: Los Alamos National Laboratory, Chemistry Division, Los Alamos, New Mexico 87545, USA.
authors.forename: Nathan H
authors.initials: NH
authors.lastname: Mack
authors.affiliation: Los Alamos National Laboratory, Chemistry Division, Los Alamos, New Mexico 87545, USA.
authors.forename: Hsing-Lin
authors.initials: HL
authors.lastname: Wang
authors.affiliation: Los Alamos National Laboratory, Chemistry Division, Los Alamos, New Mexico 87545, USA and Los Alamos National Laboratory, Center for Advanced Solar Photophysics, Los Alamos, New Mexico 87545, USA.
authors.forename: Victor I
authors.initials: VI
authors.lastname: Klimov
authors.affiliation: Los Alamos National Laboratory, Materials Physics and Applications Division, Center for Integrated Nanotechnologies, Los Alamos, New Mexico 87545, USA.
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Hollingsworth
authors.affiliation: Los Alamos National Laboratory, Chemistry Division, Los Alamos, New Mexico 87545, USA and Los Alamos National Laboratory, Materials Physics and Applications Division, Center for Integrated Nanotechnologies, Los Alamos, New Mexico 87545, USA.
authors.forename: Han
authors.initials: H
authors.lastname: Htoon