Concept

Épitaxie par jet moléculaire

Publications associées (507)

HREM studies of twins in Cd1−xZnxTe (x ≈ 0.04) thin films grown by molecular beam epitaxy

The microstructure of ferroelectric Cd1−xZnxTe (CZT) thin films with x ≈ 0.04 grown by molecular beam epitaxy has been studied by means of cross sectional high-resolution transmission electron microscopy (HREM). High- density {1 1 1} lamellar twins are fou ...

2009

Catalyst-free nanowires with axial InxGa1-xAs/GaAs heterostructures

Anna Fontcuberta i Morral, Martin Heiss, Sonia Conesa Boj

Self-catalyzed growth of axial InxGa1-xAs/GaAs heterostructures has been realized by molecular beam epitaxy. The growth of the wires is achieved from gallium/indium alloy droplets that are nucleated in situ. By variation of the In/Ga beam flux during the g ...

Institute of Physics2009

Control of polarization and dipole moment in low-dimensional semiconductor nanostructures

Philipp Ridha

We demonstrate the control of polarization and dipole moment in semiconductor nanostructures, through nanoscale engineering of shape and composition. Rodlike nanostructures, elongated along the growth direction, are obtained by molecular beam epitaxial gro ...

2009

GaN grown on (111) single crystal diamond substrate by molecular beam epitaxy

Nicolas Grandjean, Antonino Francesco Castiglia, Marco Malinverni, Denis Martin

GaN epilayers are grown on (111) oriented single crystal diamond substrate by ammonia-source molecular beam epitaxy. Each step of the growth is monitored in situ by reflection high energy electron diffraction. It is found that a two-dimensional epitaxial w ...

2009

Homogeneous and inhomogeneous linewidth broadening of single polar GaN/AlN quantum dots

Nicolas Grandjean, Raphaël Butté, Dobri Simeonov

We report on the dependence on temperature of the homogeneous and inhomogeneous broadening of the fundamental transition of single polar GaN/AlN quantum dots (QDs). Stranski-Krastanov QDs have been grown by molecular beam epitaxy using NH3 as a nitrogen so ...

V C H Publishers, Suite 909, 220 E 23Rd St, New York, Ny 10010 Usa2009

Bound-to-continuum terahertz quantum cascade laser with a single-quantum-well phonon extraction injection stage

Elyahou Kapon, Alok Rudra, Pascal Gallo, Jérôme Faist

A terahertz quantum cascade laser design that combines a wide gain bandwidth, large photon-driven transport and good high-temperature characteristics is presented. It relies on a diagonal transition between a bound state and doublet of states tunnel couple ...

2009

Investigation of a contacting scheme for self-assembled cleaved edge overgrown InAs nanowires and quantum dot arrays

Anna Fontcuberta i Morral, Emanuele Uccelli

A contacting scheme to measure the transport properties into self-assembled InAs Quantum Wires (QWRs) or Quantum Dots (QDs) is presented. The nanostructures are formed on the (110) cleaved edge of a AlAs/AlGaAs heterostructure substrate by means of the Cle ...

2009

Long range epitaxial growth of prismatic heterostructures on the facets of catalyst-free GaAs nanowires

Anna Fontcuberta i Morral, Sonia Conesa Boj

Molecular beam epitaxy is used for the synthesis of catalyst-free GaAs nanowires and related quantum heterostructures. After growth of the nanowire GaAs core, the conditions are changed in situ towards standard MBE planar growth in order to obtain quantum ...

Royal Society of Chemistry2009

Characterization of a-plane grown GaN on sapphire substrates by electron microscopy

Yadira Arroyo Rojas Dasilva

Gallium nitride (GaN) is one of the most interesting materials for devices applications such as blue light emitting diodes, laser diodes and high power and high temperature electronic applications, because of its large band gap (3.39 eV). Several growth te ...

EPFL2009

Non-polar GaN epilayers and heterostructures for photonic applications

Tiankai Zhu

This PhD thesis describes the experimental study of wurtzite III-nitride semiconductors grown on non-polar crystal orientations, namely (1120) a- and (1010) m-planes. Hindered by poor material quality, they were not as extensively investigated as the polar ...

EPFL2009

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