Publications de Emanuele Pelucchi

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Quantum dots (QDs) of high symmetry (e.g., C3v) have degenerate bright exciton states, unlike QDs of C2v symmetry, making them intrinsically suitable for the generation of entangled photon pairs. Deviations from C3v symmetry are detected in real QDs by pol ...

Negatively and positively charged excitons are identified in the spatially resolved photoluminescence spectra of quantum wires. We demonstrate that charged excitons are weakly localized in disordered quantum wires. As a consequence, the enhancement of the ...

High symmetry epitaxial quantum dots (QDs) with three or more symmetry planes provide a very promising route for the generation of entangled photons for quantum information applications. The great challenge to fabricate nanoscopic high symmetry QDs is furt ...

A novel technique for tuning the strength of quantum confinement in site-controlled semiconductor quantum dots (QDs) is introduced and investigated theoretically and experimentally. The method makes use of controlled local growth rates during metalorganic ...

We report on the observation of negatively- and positively-charged excitons in the photoluminescence spectra of V-groove quantum wires. The. charged exciton binding energy increases with the strength of the quantum confinement. We demonstrate that fluctuat ...

We investigate the embedded interfaces of GaAs/AlGaAs quantum wells grown by metal organic vapor phase epitaxy on slightly (< 1 degrees)-misoriented (001) substrates using selective etching and atomic force microscopy. Depending on the substrate misorienta ...

The emission pattern of charged excitons in a semiconductor quantum dot (QD) is composed of a quadruplet of linearly polarized lines when a magnetic field is applied in a Voigt configuration. The orientation of the linear polarization of exciton emission i ...

We present a model for the interplay between the fundamental phenomena responsible for the formation of nanostructures by metalorganic vapor phase epitaxy on patterned (001)/(111)B GaAs substrates. Experiments have demonstrated that V-groove quantum wires ...

We demonstrate efficient, regulated single-photon operation from site-controlled InGaAs quantum dots (QDs) grown on a prepatterned substrate. Under nonresonant optical excitation, carriers trapped at structural or compositional defects of the adjacent nano ...

The results of a group theoretical analysis of the excitonic fine structure are presented and compared with spectroscopic data on single quantum dots. The spectral features reveal the signatures of a symmetry higher than the crystal symmetry (C-3v). A cons ...

We present results on the polarization-resolved photoluminescence emitted from InGaAs/AlGaAs single quantum dots (QDs) grown in inverted tetrahedral pyramids. The emitted light was detected for two mutually perpendicular linear polarization directions in t ...

A systematic and simple theoretical approach is proposed to analyze true degeneracies and polarized decay patterns of exciton complexes in semiconductor quantum dots. The results provide reliable spectral signatures for efficient symmetry characterization, ...

The dynamics of charging and recombination of photoexcited, site-controlled semiconductor quantum dots (QDs) are investigated using microphotoluminescence (PL) and photon-correlation spectroscopy combined with rate equation modeling. Several species of neu ...

The structural and optical properties of controlled-heterostructure-potential, low-dimensional GaAs/AlGaAs nanostructures self-formed during organometallic chemical vapor deposition in tetrahedral pyramids etched in (111) B-GaAs substrates, are investigate ...

Emanuele Pelucchi

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Fine structure of exciton complexes in high-symmetry quantum dots: Effects of symmetry breaking and symmetry elevation

Enhancement of the binding energy of charged excitons in disordered quantum wires

Spectral signatures of high-symmetry quantum dots and effects of symmetry breaking

Mechanisms of Quantum Dot Energy Engineering by Metalorganic Vapor Phase Epitaxy on Patterned Nonplanar Substrates

Charged excitons in modulation-doped quantum wires

Correlation between optical properties and interfaces morphology of GaAs/AlGaAs quantum wells

Coulomb correlations of charged excitons in semiconductor quantum dots

Decomposition, diffusion, and growth rate anisotropies in self-limited profiles during metalorganic vapor-phase epitaxy of seeded nanostructures

Optimization of the efficiency of single photon sources based on quantum dots under optical excitation

Symmetry Elevation and Symmetry Breaking: Keys to Describe and Explain Excitonic Complexes in Semiconductor Quantum Dots

Excited excitonic states observed in semiconductor quantum dots using polarization resolved optical spectroscopy

Single-photon emission from pyramidal quantum dots: The impact of hole thermalization on photon emission statistics

Symmetries and the Polarized Optical Spectra of Exciton Complexes in Quantum Dots

Quantum Dot Exciton Dynamics Probed by Photon-Correlation Spectroscopy

Sub-meV Photoluminescence Linewidth and >106 cm2/Vs Electron Mobility in AlGaAs/GaAs Quantum Wells Grown by Metallorganic Vapor Phase Epitaxy on Slightly Misoriented Substrates

Pyramidal GaAs/AlzGa1-zAs quantum wire/dot systems with controlled heterostructure potential

Narrow (~4meV) inhomogeneous broadening and its correlation with confinement potential of pyramidal quantum dot arrays

Transition from Two-Dimensional to Three-Dimensional Quantum Confinement in Semiconductor Quantum Wires/Quantum Dots

Alloy Segregation, Quantum Confinement and Carrier Capture in Self-Ordered Pyramidal Quantum Wires

Patterning of Confined-State Energies in Site-Controlled Semiconductor Quantum Dots