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Charge control in laterally coupled double quantum dots
(American Physical Society, 2011-07-27)
We investigate the electronic and optical properties of InAs double quantum dots grown on GaAs (001) and laterally aligned along the [110] crystal direction. The emission spectrum has been investigated as a function of a ...
Dominant channels of exciton spin relaxation in photoexcited self-assembled (In,Ga)As quantum dots
(American Physical Society, 2011-04-22)
We present a comprehensive theoretical investigation of spin relaxation processes of excitons in photoexcited self-assembled quantum dots. The exciton spin relaxations are considered between dark- and bright-exciton states ...
Exciton storage in type-ll quantum dots using the optical Aharonov-Bohm effect
(AIP Publishing, 2014-05-12)
We investigate the bright-to-dark exciton conversion efficiency in type-II quantum dots subject to a
perpendicular magnetic field. To this end, we take the exciton storage protocol recently proposed
by Simonin and ...
Large hole spin anticrossings in InAs/GaAs double quantum dots
(AIP Publishing, 2013-09-23)
We show that hole states in InAs/GaAs double quantum dots can exhibit spin anticrossings of up to 1 meV, according to simulations with a three dimensional Burt-Foreman Hamiltonian including strain and piezoelectric fields. ...
Two-Photon Induced Blue Shift of Core and Shell Optical Transitions in Colloidal CdSe/CdS quasi-type II Quantum Rods
(American Chemical Society, 2013-03)
The spectral dependence of the two-photon absorption in CdSe/CdS core/shell nanocrystal heterorods has been studied via two-photon-induced luminescence excitation spectroscopy. We verified that the two-photon absorption ...
Emission spectrum of quasiresonant laterally coupled quantum dots
(American Physical Society, 2011-12-21)
We calculate the emission spectrum of neutral and charged excitons in a pair of laterally coupled InGaAs quantum dots with nearly degenerate energy levels. As the interdot distance decreases, a number of changes take place ...
Mixed correlation phases in elongated quantum dots
(American Physical Society, 2010-09-07)
It is theoretically shown, within the local spin-density-functional theory framework, that inhomogeneous confining potentials in elongated, diluted N-electron quantum dots may lead to the formation of mixed phases in which ...
Strong configuration mixing due to dielectric confinement in semiconductor nanorods
(American Physical Society, 2009)
The interaction between electron-electron and electron-hole pairs in semiconductor nanorods embedded in dielectric media is investigated using a configuration-interaction method. Contrary to spherical quantum dots of similar ...
Dielectric control of spin in semiconductor spherical quantum dots
(American Institute of Physics, 2008)
The ground state electronic configuration of semiconductor spherical quantum dots populated with
different numbers of excess electrons, for different radii and dielectric constants of the embedding
medium is calculated ...
From quantum dots to quantum wires: electronic structure of semiconductor nanorods
(American Physical Society, 2009)
The transition bridge between zero-dimensional quantum dots and one-dimensional quantum wires is explored theoretically by means of the construction of the addition energy spectra of nanorods with different lengths. Spin ...