Publications de Nicolas Moret | EPFL Graph Search

Narrow inhomogeneous broadening of V-groove quantum wires grown on vicinal substrates

Benjamin Dwir, Elyahou Kapon, Daniel Oberli, Alok Rudra, Nicolas Moret, Pascal Gallo

Significant reduction in inhomogeneous broadening of GaAs/AlGaAs V- groove quantum wires (QWRs) is achieved by growing them on vicinal (001) GaAs substrates misaligned by several degrees with respect to the [1 (1) over bar0] groove direction. Low temperatu ...

American Institute of Physics2008

Exciton localization and diffusion in low-dimensional nanostructures formed on non-planar substrates

Nicolas Moret

Quantum wells (QWs), quantum wires (QWRs) and quantum dots (QDs) are semiconductor heterostructures with nanoscopic dimensions. At this length scale, their properties are governed by quantum mechanics. The interest in these nanostructures is motivated by a ...

EPFL2008

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

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

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