Pascal Gallo

Cette personne n’est plus à l’EPFL

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Publications associées (33)

Investigation of coherent acoustic phonons in terahertz quantum cascade laser structures using femtosecond pump-probe spectroscopy

Elyahou Kapon, Alok Rudra, Jérôme Faist, Pascal Gallo

The dynamics of acoustic vibrations in terahertz quantum cascade laser structures (THz-QCLs) is studied by means of femtosecond pump-probe spectroscopy. The phonon modes are characterized by the folding of the acoustic dispersion into an effective reduced ...

Amer Inst Physics2012

Lennard-Jones binary mixture in disordered matrices: exploring the mode coupling scenario at increasing confinement

Pascal Gallo

We present results of molecular dynamics simulations performed on a Lennard-Jones liquid binary mixture confined in matrices of soft spheres at increasing packing fraction. We study the dynamical properties of the liquid at a given density upon supercoolin ...

2011

Phonon-Mediated Coupling of InGaAs/GaAs Quantum-Dot Excitons to Photonic Crystal Cavities

Vincenzo Savona, Benjamin Dwir, Elyahou Kapon, Alok Rudra, Kirill Atlasov, Guillaume Jean Tarel, Pascal Gallo, Milan Calic

We demonstrate that the emission characteristics of site-controlled InGaAs/GaAs single quantum dots embedded in photonic crystal slab cavities correspond to single confined excitons coupled to cavity modes, unlike previous reports of similar systems based ...

2011

Ordered systems of site-controlled pyramidal quantum dots incorporated in photonic crystal cavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessandro Surrente, Pascal Gallo, Marco Felici

The coupling of a prescribed number of site-controlled pyramidal quantum dots (QDs) with photonic crystal (PhC) cavities was studied by polarization and power-dependent photoluminescence measurements. The energy of the cavity mode could be readily tuned, m ...

Institute of Physics2011

RETRACTED: Polarization-entangled photons produced with high-symmetry site-controlled quantum dots

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Jérôme Faist, Pascal Gallo, Arun Mohan, Marco Felici

Nature Publishing Group2010

Record-Low Inhomogeneous Broadening of Site-Controlled Quantum Dots for Nanophotonics

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Jérôme Faist, Pascal Gallo, Arun Mohan, Marco Felici

Wiley-Blackwell2010

1D photonic band formation and photon localization in finite-size photonic-crystal waveguides

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Kirill Atlasov, Pascal Gallo, Marco Felici

2010

Dense arrays of pyramidal quantum dots with narrow linewidth photoluminescence spectra

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessandro Surrente, Pascal Gallo, Marco Felici

Arrays of site-controlled, pyramidal InGaAs/GaAs quantum dots (QDs) grown by organo-metallic chemical vapour deposition with densities comparable to those of self-assembled QDs (5 x 109 cm(-2)) are demonstrated. The QDs exhibit high quality photoluminescen ...

2009

Photonic-crystal microcavity laser with site-controlled quantum-wire active medium

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Kirill Atlasov, Pascal Gallo, Milan Calic

Site-controlled quantum-wire photonic-crystal microcavity laser is experimentally demonstrated using optical pumping. The single-mode lasing and threshold are established based on the transient laser response, linewidth narrowing, and the details of the no ...

2009

Effect of sidewall passivation in BCl3/N2 inductively coupled plasma etching of two-dimensional GaAs photonic crystals

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Kirill Atlasov, Pascal Gallo

The effect of surface passivation in BCl3/N-2 inductively coupled plasma reactive-ion etching of GaAs-based photonic crystals (PhCs) was investigated. It is shown that sidewall passivation is crucial for achieving cylindrical, vertical PhC holes, where the ...

2009

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

Elyahou Kapon, Alok Rudra, Jérôme Faist, Pascal Gallo

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

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

Integration of site-controlled pyramidal quantum dots and photonic crystal membrane cavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Kirill Atlasov, Pascal Gallo, Arun Mohan, Marco Felici

AIP American Institute of Physics2008

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