Journal ArticleDOI
Time-resolved studies of single semiconductor quantum dots
TLDR
In this article, a selective technique based on etching after electron-beam lithography, combined with the use of an optical microscope to enhance the spatial resolution of a time-resolved photoluminescence system, enabled the observation of single quantum dots.Abstract:
We present time-resolved optical studies of single self-assembled quantum dots. The dots were obtained by Stranski-Krastanow growth of InP on ${\mathrm{Ga}}_{0.5}{\mathrm{In}}_{0.5}\mathrm{P}.$ A selective technique based on etching after electron-beam lithography, combined with the use of an optical microscope to enhance the spatial resolution of a time-resolved photoluminescence system, enabled the observation of single quantum dots. The emission linewidth of a single InP dot is observed to be around 3 meV. The evolution of the time-resolved photoluminescence spectra was studied as a function of excitation intensity. Under intense pulsed excitation the decay is no more a simple exponential due to feeding from higher energy levels, as a result of state filling. A four-level rate equation system is successfully used to model the results.read more
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Journal ArticleDOI
Single-photon emission at 1.55 μm from MOVPE-grown InAs quantum dots on InGaAs/GaAs metamorphic buffers
Matthias Paul,Fabian Olbrich,Jonatan Höschele,Susanne Schreier,Jan Kettler,Simone Luca Portalupi,Michael Jetter,Peter Michler +7 more
TL;DR: In this article, the InAs quantum dots (QDs) were fabricated on InGaAs/GaAs metamorphic buffer layers on a GaAs substrate with area densities that allow addressing single quantum dots.
Journal ArticleDOI
A generalized model for time-resolved luminescence of localized carriers and applications: Dispersive thermodynamics of localized carriers.
Zhicheng Su,Shijie Xu +1 more
TL;DR: An analytical generalized model for temperature dependent time-resolved luminescence is developed, capable of giving a quantitative description of dispersive carrier dynamics in a wide temperature range, and is successfully applied to quantitatively interpret the time- Resolved Luminescence data of several material systems, showing its universality and accuracy.
Journal ArticleDOI
Manifestation of unconventional biexciton states in quantum dots.
Gerald Hönig,Gordon Callsen,Andrei Schliwa,Stefan Kalinowski,Christian Kindel,Satoshi Kako,Yasuhiko Arakawa,Dieter Bimberg,Axel Hoffmann +8 more
TL;DR: This work investigates the behaviour of two electron-hole pairs in a quantum dot with wurtzite crystal structure evoking a charge carrier separation on the basis of large spontaneous and piezoelectric polarizations, thus reducing carrier overlap and consequently decay probabilities.
Book ChapterDOI
Excitons in Semiconductor Nanostructures
TL;DR: In this article, the authors summarized the comprehensive understanding of linear excitonic spectra from quantum nanostructures with disorder and provided a detailed description of the relevant elementary processes that allowed quantitative predictions for new experiments and analysis.
Journal ArticleDOI
Three-photon cascade from single self-assembled InP quantum dots
TL;DR: In this article, photon correlation measurements performed on single self-assembled InP quantum dots in a GaInP barrier were performed under continuous excitation, revealing a pronounced antibunching dip for the emission from the single exciton, the bi-exciton, and the tri-excitus.