Publications by Anas Mouti | EPFL Graph Search

Biexciton emission and crystalline quality of ZnO nano-objects

Jean-Philippe Ansermet, Benoît Marie Joseph Deveaud, Jean-Daniel Ganière, Pierre Stadelmann, Pierre Michel Corfdir, Anas Mouti, Elisa Papa

The design of cost-effective standards for the quality of nano-objects is currently a key issue toward their massive use for optoelectronic applications. The observation by photoluminescence of narrow excitonic and biexcitonic emission lines in semiconduct ...

Institute of Physics2011

Stress-modulated composition in the vicinity of dislocations in nearly lattice matched AlxIn1-x N/GaN heterostructures: A possible explanation of defect insensitivity

Nicolas Grandjean, Jean-François Carlin, Marco Cantoni, Eric Feltin, Pierre Stadelmann, Anas Mouti, Jean-Luc Rouvière

Evidence of composition fluctuations around threading dislocations at scales ranging from atomic distances to tens of nanometers is provided by z-contrast imaging, strain measurement, and energy dispersive x-ray spectroscopy in AlxIn1-x N/GaN heterostructu ...

2011

Defect Insensitive Light Emission in Blue Diode Materials Investigated by Electron Microscopy and Transmission Cathodoluminescence

Anas Mouti

We study in this thesis the structural origin of defect insensitive light emission in indium containing group-III nitride ternary alloys grown on sapphire, which are the active materials for the commercially available high brightness blue diodes. These str ...

EPFL2011

Observation of dodecagon-shape V-defects in GaN/AlInN multiple quantum wells

Nicolas Grandjean, Jean-François Carlin, Eric Feltin, Anas Mouti

The microstructure of GaN(Si)/AlInN multiple quantum wells grown on GaN/Al2O3 (0001) templates by metalorganic vapor-phase epitaxy has been investigated using transmission electron microscopy and associated techniques. Dodecagon-shape V-defects with hexago ...

AIP American Institute of Physics2010

Cathodoluminescence in a (S)TEM – Exploring Possibilities and Limits

Anas Mouti, Cécile Hébert, Duncan Thomas Lindsay Alexander, Pierre Stadelmann

Cambridge, Cambridge University Press2010

Core-shell Au@(TiO2, SiO2) nanoparticles with tunable morphology

Pierre Stadelmann, Anas Mouti

A novel approach based on the Stober method allows breaking of the symmetry of core-shell systems based on metallic core and metal oxide shell. By adjusting the proportion of the TiO2 precursor with regard to the silica precursor, different morphologies of ...

Royal Society of Chemistry2010

High-Mobility AlGaN/GaN Two-Dimensional Electron Gas Heterostructure Grown on (111) Single Crystal Diamond Substrate

Nicolas Grandjean, Marco Malinverni, Pierre Stadelmann, Denis Martin, Anas Mouti, Marcel Py, Marcus Gonschorek

High mobility Al0.28Ga0.72N/GaN two-dimensional electron gas (2DEG) is achieved on ( 111) oriented single crystal diamond substrate. The surface morphology of the epilayer is free of cracks thanks to the use of an AlN interlayer for strain relaxation. The ...

2010

Polarization field mapping of Al0.85In0.15N/AlN/GaN heterostructure

Nicolas Grandjean, Jean-François Carlin, Eric Feltin, Marcus Gonschorek, Anas Mouti

Off-axis electron holography has been used to measure the built-in potential profile across an Al0.85In0.15N/AlN/GaN high electron mobility transistor heterostructure. Profile measurements indicated a polarization-induced electric field of 6.9 MV/cm within ...

2009

Mapping Polarization Fields in Al0.85In0.15N/AlN/GaN Heterostructures

Nicolas Grandjean, Jean-François Carlin, Anas Mouti

Cambridge, Cambridge University Press2009

Temperature-dependent low electric field charging of Si nanocrystals embedded within oxide–nitride–oxide dielectric stacks

Anas Mouti

2009