Recherche

Afficher tous les résultats pour

Accueil

Personne

Eleonora Russo

Cette personne a quitté l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (28)

Page 1 sur 2

Growth mechanisms of III-V semiconductor nanostructures on silicon

Eleonora Russo

The aim of this thesis is to understand the dynamics of the growth of catalyst-free III-V semiconductor nanostructures on silicon substrates, focusing the attention mainly on the early stages of growths. A detailed understanding of this first phase of the ...

EPFL2015

III-V nanowire arrays: growth and light interaction

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin Heiss, Federico Matteini, Eleonora Russo, Sonia Conesa Boj, Esther Alarcon Llado, Anna Dalmau Mallorquí

Semiconductor nanowire arrays are reproducible and rational platforms for the realization of high performing designs of light emitting diodes and photovoltaic devices. In this paper we present an overview of the growth challenges of III-V nanowire arrays o ...

Institute of Physics2014

Polarization response of nanowires a la carte

Anna Fontcuberta i Morral, Eleonora Russo, Esther Alarcon Llado, Martin Heiss, Francesca Amaduzzi, Alberto Casadei

Thanks to their special interaction with light, semiconductor nanowires have opened new avenues in photonics, quantum optics and solar energy harvesting. One of the major challenges for their full technological deployment has been their strong polarization ...

Nature Publishing Group2015

Photonic-Plasmonic Coupling of GaAs Single Nanowires to Optical Nanoantennas

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Eleonora Russo, Federico Matteini, Martin Heiss, Alberto Casadei

We successfully demonstrate the plasmonic coupling between metal nanoantennas and individual GaAs nanowires (NWs). In particular, by using dark-field scattering and second harmonic excitation spectroscopy in partnership with analytical and full-vector FDTD ...

American Chemical Society2014

Cantilever Magnetometry of Individual Ni Nanotubes

Anna Fontcuberta i Morral, Dirk Grundler, Eleonora Russo

Recent experimental and theoretical work has focused on ferromagnetic nanotubes due to their potential applications as magnetic sensors or as elements in high-density magnetic memory. The possible presence of magnetic vortex states-states which produce no ...

Amer Chemical Soc2012

Tuning the g-factor of neutral and charged excitons confined to self-assembled (Al,Ga)As shell quantum dots

Anna Fontcuberta i Morral, Martin Heiss, Eleonora Russo, Pierre Michel Corfdir, Yannik Fontana

We study the neutral exciton (X) and charged exciton (CX) transitions from (Al,Ga) As shell quantum dots located in core-shell nanowires, in the presence of a magnetic field. The g-factors and the diamagnetic coefficients of both the X and the CX depend on ...

American Institute of Physics2014

Self-assembled quantum dots in a nanowire system for quantum photonics

Nicola Marzari, Anna Fontcuberta i Morral, Marco Cantoni, Martin Heiss, Eleonora Russo, Sonia Conesa Boj, Yannik Fontana, Bernt Ketterer

Quantum dots embedded within nanowires represent one of the most promising technologies for applications in quantum photonics. Whereas the top-down fabrication of such structures remains a technological challenge, their bottom-up fabrication through self-a ...

Nature Publishing Group2013

Nanoskiving Core-Shell Nanowires: A New Fabrication Method for Nano-optics

Anna Fontcuberta i Morral, Eleonora Russo, Martin Heiss, Yannik Fontana

This paper describes the fabrication of functional optical devices by sectioning quantum-dot-in-nanowires systems with predefined lengths and orientations. This fabrication process requires only two steps, embedding the nanowires in epoxy and using an ultr ...

Amer Chemical Soc2014

High Yield of GaAs Nanowire Arrays on Si Mediated by the Pinning and Contact Angle of Ga

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Eleonora Russo, Heidi Andrea Potts, Federico Matteini, Sonia Conesa Boj, Jelena Vukajlovic Plestina, Anna Dalmau Mallorquí

GaAs nanowire arrays on Silicon offer great perspectives in the :optoeleetronics and solar cell industry. To fulfill this potential, gold-free growth in predetermined positions should be achieved. Ga-assisted growth of GaAs nano-wires in the form of array ...

American Chemical Society2015

Plastic and Elastic Strain Fields in GaAs/Si Core-Shell Nanowires

Christophe Ballif, Anna Fontcuberta i Morral, Martin Heiss, Sylvain Dunand, Eleonora Russo, Sonia Conesa Boj

Thanks to their unique morphology, nanowires have enabled integration of materials in a way that was not possible before with thin film technology. In turn, this opens new avenues for applications in the areas of energy harvesting, electronics, and optoele ...

American Chemical Society2014

Growth mechanisms and process window for InAs V-shaped nanoscale membranes on Si[001]

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin Heiss, Eleonora Russo, Sonia Conesa Boj, Esther Alarcon Llado, Anna Dalmau Mallorquí

Organized growth of high aspect-ratio nanostructures such as membranes is interesting for opto-electronic and energy harvesting applications. Recently, we reported a new form of InAs nano-membranes grown on Si substrates with enhanced light scattering prop ...

Institute of Physics2013

Reversal Mechanism of an Individual Ni Nanotube Simultaneously Studied by Torque and SQUID Magnetometry

Anna Fontcuberta i Morral, Dirk Grundler, Eleonora Russo

Using an optimally coupled nanometer-scale SQUID, we measure the magnetic flux originating from an individual ferromagnetic Ni nanotube attached to a Si cantilever. At the same time, we detect the nanotube's volume magnetization using torque magnetometry. ...

American Physical Society2013

Electrical transport in C-doped GaAs nanowires: surface effects

Anna Fontcuberta i Morral, Eleonora Russo, Martin Heiss, Esther Alarcon Llado, Alberto Casadei, Fauzia Jabeen

The resistivity and mobility of carbon-doped GaAs nanowires have been studied for different doping concentrations. Surface effects have been evaluated by comparing unpassivated with passivated nanowires. We directly see the influence of the surface: the pi ...

Wiley-Blackwell2013

Anisotropic magnetoresistance of individual CoFeB and Ni nanotubes with values of up to 1.4% at room temperature

Anna Fontcuberta i Morral, Dirk Grundler, Gözde Tütüncüoglu, Eleonora Russo, Federico Matteini, Reza Zamani

Magnetic nanotubes (NTs) are interesting for magnetic memory and magnonic applications. We report magnetotransport experiments on individual 10 to 20 mu m long Ni and CoFeB NTs with outer diameters ranging from 160 to 390 nm and film thicknesses of 20 to 4 ...

Amer Inst Physics2014

Three-Dimensional Multiple-Order Twinning of Self-Catalyzed GaAs Nanowires on Si Substrates

Anna Fontcuberta i Morral, François Morier-Genoud, Eleonora Russo, Martin Heiss, Emanuele Uccelli

In this paper we introduce a new paradigm for nanowire growth that explains the unwanted appearance of parasitic nonvertical nanowires. With a crystal structure polarization analysis of the initial stages of GaAs nanowire growth on Si substrates, we demons ...

American Chemical Society2011

Hybrid axial and radial Si-GaAs heterostructures in nanowires

Christophe Ballif, Anna Fontcuberta i Morral, Martin Heiss, Sylvain Dunand, Eleonora Russo, Sonia Conesa Boj, Daniel Rüffer

Hybrid structures are formed from materials of different families. Traditionally, group IV and III-V semiconductors have not been integrated together in the same device or application. In this work we present a new approach for obtaining Si-GaAs hybrid het ...

Royal Society of Chemistry2013

Bottom-up engineering of InAs at the nanoscale: From V-shaped nanomembranes to nanowires

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Eleonora Russo, Sonia Conesa Boj, Anna Dalmau Mallorquí

The ability to rationally tune the morphology of nanostructures is a fundamental milestone in nanoscale engineering. In particular, the possibility to switch between different shapes within the same material system represents a further step in the developm ...

Elsevier2015

Probing inhomogeneous composition in core/shell nanowires by Raman spectroscopy

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin Heiss, Federico Matteini, Eleonora Russo, Sonia Conesa Boj, Esther Alarcon Llado, Francesca Amaduzzi

Due to its non-destructive and its micro-spatial resolution, Raman spectroscopy is a powerful tool for a rapid structural and compositional characterization of nanoscale materials. Here, by combining the compositional dependence of the Raman peaks with the ...

American Institute of Physics2014

Nanoscale multifunctional sensor formed by a Ni nanotube and a scanning Nb nanoSQUID

Anna Fontcuberta i Morral, Dirk Grundler, Eleonora Russo, Daniel Rüffer

Nanoscale magnets might form the building blocks of next generation memories. To explore their functionality, magnetic sensing at the nanoscale is key. We present a multifunctional combination of a nanometer-sized superconducting quantum interference devic ...

American Physical Society2013

Characterization and analysis of InAs/p-Si heterojunction nanowire-based solar cell

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Eleonora Russo, Federico Matteini, Esther Alarcon Llado, Anna Dalmau Mallorquí

The growth of compound semiconductor nanowires on the silicon platform has opened many new perspectives in the area of electronics, optoelectronics and photovoltaics. We have grown a 1 x 1 mm(2) array of InAs nanowires on p-type silicon for the fabrication ...

Institute of Physics2014