title: Cooperative Effects in the Photoluminescence of (In,Ga)As/GaAs Quantum Dot Chain Structures.
abstract: Multilayer In0.4Ga0.6As/GaAs quantum dot (QD) chain samples are investigated by means of cw and time-resolved photoluminescence (PL) spectroscopy in order to study the peculiarities of interdot coupling in such nanostructures. The temperature dependence of the PL has revealed details of the confinement. Non-thermal carrier distribution through in-chain, interdot wave function coupling is found. The peculiar dependences of the PL decay time on the excitation and detection energies are ascribed to the electronic interdot coupling and the long-range coupling through the radiation field. It is shown that the dependence of the PL decay time on the excitation wavelength is a result of the superradiance effect.
authors.affiliation: Department of Physics, University of Arkansas, 226 Physics Building, Fayetteville, AR, 72701, USA. ymazur@uark.edu.
authors.forename: Yu I
authors.initials: YI
authors.lastname: Mazur
authors.forename: Vg
authors.initials: V
authors.lastname: Dorogan
authors.forename: E
authors.initials: E
authors.lastname: Marega
authors.forename: Df
authors.initials: D
authors.lastname: Cesar
authors.forename: V
authors.initials: V
authors.lastname: Lopez-Richard
authors.forename: Ge
authors.initials: G
authors.lastname: Marques
authors.forename: Z Ya
authors.initials: ZY
authors.lastname: Zhuchenko
authors.forename: Gg
authors.initials: G
authors.lastname: Tarasov
authors.forename: Gj
authors.initials: G
authors.lastname: Salamo