Home

Person

Anna Fontcuberta i Morral

About
Privacy
Disclaimer

Graph Chatbot

Related publications (286)

Probing inhomogeneous composition in core/shell nanowires by Raman spectroscopy

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

Three-dimensional nanoscale study of Al segregation and quantum dot formation in GaAs/AlGaAs core-shell nanowires

Yannik Fontana, Anna Fontcuberta i Morral, Martin Heiss, Sonia Conesa Boj, Eleonora Russo, Luca Francaviglia

GaAs/Al-GaAs core-shell nanowires fabricated by molecular beam epitaxy contain quantum confining structures susceptible of producing narrow photoluminescence (PL) and single photons. The nanoscale chemical mapping of these structures is analyzed in 3D by a ...

American Institute of Physics2014

Semiconductor Nanowires for Next Generation Solar Cells

Anna Fontcuberta i Morral

Nanowires are filamentary crystals with a tailored diameter in the submicron range. This particular morphology has improved existing and inspired many novel applications such as biosensors 1, high mobility transistors, lasers 2,3 and solar cells 4. The one ...

IEEE2014

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

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

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

III-V nanowire arrays: growth and light interaction

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

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

Exciton footprint of self-assembled AlGaAs quantum dots in core-shell nanowires

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

Quantum-dot-in-nanowire systems constitute building blocks for advanced photonics and sensing applications. The electronic symmetry of the emitters impacts their function capabilities. Here we study the fine structure of gallium-rich quantum dots nested in ...

American Physical Society2014

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

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Eleonora Russo, Dirk Grundler, 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

Ga-assisted growth of GaAs nanowires on silicon, comparison of surface SiOx of different nature

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Esther Alarcon Llado, Federico Matteini

Physical properties of surfaces are extremely important for initiation and nucleation of crystal growth, including nanowires. In recent years, fluctuations in surface characteristics have often been related to unreproducible growth of GaAs nanowires on Si ...

Elsevier2014

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

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

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

Quantum Dot Opto-Mechanics in a Fully Self-Assembled Nanowire

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

We show that optically active quantum dots (QDs) embedded in MBE-grown GaAs/AlGaAs core-shell nanowires (NWs) are coupled to the NW mechanical motion. Oscillations of the NW modulate the QD emission energy in a broad range exceeding 14 meV. Furthermore, th ...

American Chemical Society2014

Photonic-Plasmonic Coupling of GaAs Single Nanowires to Optical Nanoantennas

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

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

Functional carbon nanosheets prepared from hexayne amphiphile monolayers at room temperature

Guillaume Pasche, Yannik Fontana, Anne-Clémence Corminboeuf, Anna Fontcuberta i Morral, Holger Frauenrath, Emad Oveisi, Stephen Schrettl, Javier Reguera Gomez, Riccardo Petraglia

Carbon nanostructures that feature two-dimensional extended nanosheets are important components for technological applications such as high-performance composites, lithium-ion storage, photovoltaics and nanoelectronics. Chemical functionalization would ren ...

Nature Publishing Group2014

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

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

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

Nonlinear motion and mechanical mixing in as-grown GaAs nanowires

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Federico Matteini

We report nonlinear behavior in the motion of driven nanowire cantilevers. The nonlinearity can be described by the Duffing equation and is used to demonstrate mechanical mixing of two distinct excitation frequencies. Furthermore, we demonstrate that the n ...

American Institute of Physics2014

Semiconductor nanowires for efficient, sustainable solar energy harvesting

Anna Fontcuberta i Morral, Martin Heiss, Anna Dalmau Mallorquí

SPIE-Intl Soc Optical Eng2013

Hartree simulations of coupled quantum Hall edge states in corner-overgrown heterostructures

Anna Fontcuberta i Morral

The electronic states in a corner-overgrown bent GaAs/AlGaAs quantum well heterostructure are studied with numerical Hartree simulations. Transmission electron microscope pictures of the junction sharpness are shown to justify the sharp-corner potential as ...

American Physical Society2013

Hybrid axial and radial Si-GaAs heterostructures in nanowires

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

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

A review of MBE grown 0D, 1D and 2D quantum structures in a nanowire

Silvija Gradecak, Anna Fontcuberta i Morral, Xin Zhou

We review different strategies to achieve a three-dimensional energy bandgap modulation in a nanowire (NW) by the introduction of self-assembled 0D, 1D and 2D quantum structures, quantum dots (QDs), quantum wires (QWRs) and quantum wells (QWs). Starting wi ...

Royal Society of Chemistry2013

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

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

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

Electrical transport in C-doped GaAs nanowires: surface effects

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

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

Page 10 of 15