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The Epitaxy and
Physics of Nanostructures laboratory investigates the epitaxial growth
mechanism and the physics of a variety of semiconductor structures. In particular,
we undertake fundamental studies of the growth mechanism and the optical
properties of site controlled quantum dots (QDs) obtained by growing in
pre-patterned GaAs substrates. Our field of interest spans as far as
optoelectronic and electronic devices, with special attention to light
emitting sources at telecom wavelengths.
The group at the
moment comprises three PhD students and a postdoctoral fellow
Recent publications
01.
Q. Zhu, K. F. Karlsson, M. Byszewski, A. Rudra, E. Pelucchi, Z. B. He and E. Kapon. "Hybridization of Electron and Hole States in Semiconductor Quantum
Dot Molecules", Small 5,
329 (2009).
02.
L.O. Mereni, V. Dimastrodonato,
R.J. Young and E. Pelucchi, “A site-controlled quantum dot system
offering both high uniformity and spectral purity” Appl. Phys. Lett. 94, 223121 (2009).
03.
D. Y. Oberli, M. Byszewski, B. Chalupar, E. Pelucchi, A. Rudra and E. Kapon, “Coulomb correlations evidenced in the
magneto-optical spectra of charged excitons in semiconductor quantum dots” Phys.
Rev. B 80, 165312 (2009)
04.
L.O. Mereni, V. Dimastrodonato,
R.J. Young and E. Pelucchi,”Pyramidal quantum dots: high uniformity and narrow
excitonic emission”, Superlattices and
Microstructures 47, 78 (2010).
05. R. J.
Young, L. O. Mereni, N. Petkov, G. R. Knight, V. Dimastrodonato, P.K. Hurley,
G. Hughes and E. Pelucchi, “Low-angle misorientation dependence of the
optical properties of InGaAs/AlInAs
quantum wells”, J. Cryst. Growth 312, 1546
(2010).
06.
K. F. Karlsson,
M. A. Dupertuis, D.Y. Oberli, E. Pelucchi, A. Rudra, P. O. Holtz, E. Kapon,” Fine structure of exciton
complexes in high-symmetry quantum dots: effects of symmetry breaking and
symmetry elevation”, Phys. Rev. B
81, 161307(R) (2010).
07.
V. Dimastrodonato, L.
O. Mereni, R. J. Young and E. Pelucchi
”Growth and structural characterization
of pyramidal site-controlled quantum dots with high uniformity and spectral
purity”, Phys. Status Solidi B, 247, 1862 (2010)
08.
V. Dimastrodonato,
L.O. Mereni, G. Juska, and E. Pelucchi , Impact of Nitrogen
incorporation on the excitonic properties of site-controlled, pseudomorphic InGaAsN QDs grown by MetalOrganic
Vapour Phase Epitaxy, Appl. Phys. Lett 97, 072115 (2010)
09.
L.O. Mereni, V. Dimastrodonato,
G. Juska, and E. Pelucchi, “Physical properties of highly uniform InGaAs Pyramidal Quantum Dots with GaAs barriers: fine
structure splitting in pre-patterned substrates”, Superlattices
and Microstructures (2010), 10.1016/j.spmi.2010.06.011.
10.
V. Dimastrodonato,
L.O. Mereni, R. J. Young and E.
Pelucchi, “AlGaAs/GaAs/AlGaAs
quantum wells as a sensitive tool for the MOVPE reactor environment”, Journal
Crystal Growth (2010), doi:10.1016/j.jcrysgro.2010.07.021
11.
S.B. Healy, R.J. Young, L.O.
Mereni, V. Dimastrodonato, E.
Pelucchi, E.P. O’Reilly, “Physics
of novel site controlled InGaAs quantum dots on (111)
oriented substrates”, Physica E
(2009),doi:10.1016/j.physe.2009.11.099
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