Daniel Oberli

Cette personne n’est plus à l’EPFL

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Publications associées (29)

Sub-meV Photoluminescence Linewidth and >106 cm2/Vs Electron Mobility in AlGaAs/GaAs Quantum Wells Grown by Metallorganic Vapor Phase Epitaxy on Slightly Misoriented Substrates

Benjamin Dwir, Elyahou Kapon, Daniel Oberli, Alok Rudra, Nicolas Moret, Ajay Kumar

2006

Correlation between optical properties and interfaces morphology of GaAs/AlGaAs quantum wells

Elyahou Kapon, Daniel Oberli, Alok Rudra, Nicolas Moret

We investigate the embedded interfaces of GaAs/AlGaAs quantum wells grown by metal organic vapor phase epitaxy on slightly (< 1 degrees)-misoriented (001) substrates using selective etching and atomic force microscopy. Depending on the substrate misorienta ...

AIP American Institute of Physics2006

Quantum Dot Exciton Dynamics Probed by Photon-Correlation Spectroscopy

Elyahou Kapon, Daniel Oberli, Martin Henrik Baier

The dynamics of charging and recombination of photoexcited, site-controlled semiconductor quantum dots (QDs) are investigated using microphotoluminescence (PL) and photon-correlation spectroscopy combined with rate equation modeling. Several species of neu ...

2006

Optimization of the efficiency of single photon sources based on quantum dots under optical excitation

Elyahou Kapon, Daniel Oberli, Martin Henrik Baier

We demonstrate efficient, regulated single-photon operation from site-controlled InGaAs quantum dots (QDs) grown on a prepatterned substrate. Under nonresonant optical excitation, carriers trapped at structural or compositional defects of the adjacent nano ...

American Institute of Physics2006

Optical polarization anisotropy and hole states in pyramidal quantum dots

Elyahou Kapon, Daniel Oberli, Alok Rudra, Valentina Troncale

The authors present a polarization-resolved photoluminescence study of single semiconductor quantum dots (QDs) interconnected to quantum wires, measured both in a top geometry, and in a less conventional cleaved-edge geometry. Strong polarization anisotrop ...

AIP American Institute of Physics2006

Correlated Photon Emission from Semiconductor Quantum Dots Grown in Inverted Pyramids

Elyahou Kapon, Daniel Oberli, Martin Henrik Baier

2005

Charged excitons in modulation-doped quantum wires

Marc-André Dupertuis, Benjamin Dwir, Elyahou Kapon, Daniel Oberli, Nicolas Moret

We report on the observation of negatively- and positively-charged excitons in the photoluminescence spectra of V-groove quantum wires. The. charged exciton binding energy increases with the strength of the quantum confinement. We demonstrate that fluctuat ...

American Institute of Physics2005

Single-photon emission from pyramidal quantum dots: The impact of hole thermalization on photon emission statistics

Marc-André Dupertuis, Elyahou Kapon, Daniel Oberli, Martin Henrik Baier

2005

Enhancement of the binding energy of charged excitons in disordered quantum wires

Klaus Leifer, Marc-André Dupertuis, Benjamin Dwir, Elyahou Kapon, Daniel Oberli, Nicolas Moret

Negatively and positively charged excitons are identified in the spatially resolved photoluminescence spectra of quantum wires. We demonstrate that charged excitons are weakly localized in disordered quantum wires. As a consequence, the enhancement of the ...

2005

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