248 citations · 526 across the 20 of their papers we have counts for
20 papers
Self-aligned pillar arrays embedding site-controlled single quantum dots for enhanced non-classical light emission
Gediminas Juska, Simone Varo, Nicola Maraviglia +8
This work presents a foundational approach for fabricating arrays of self-aligned micro- and nanopillar structures incorporating individual site-controlled quantum dots (QDs) for e…
Evaluating the local bandgap across InxGa1-xAs multiple quantum wells in a metamorphic laser via low-loss EELS
Nicholas Stephen, Ivan Pinto-Huguet, Robert Lawrence +8
Using high resolution scanning transmission electron microscopy and low-loss electron energy loss spectroscopy, we correlate the local bandgap (Eg), indium concentration, and strai…
The importance of overcoming MOVPE surface evolution instabilities for >1.3 m metamorphic lasers on GaAs
Enrica E. Mura, Agnieszka M. Gocalinska, Megan O'Brien +7
We investigated and demonstrated a 1.3 m-band laser grown by metalorganic vapour phase epitaxy (MOVPE) on a specially engineered metamorphic parabolic graded InGaAs…
Micro-transfer printing high-efficiency GaAs photovoltaic cells onto silicon for wireless power applications
Ian Mathews, David Quinn, John Justice +5
Here we report the development of high-efficiency microscale GaAs laser power converters, and their successful transfer printing onto silicon substrates, presenting a unique, high…
Vanishing biexciton binding energy from stacked, MOVPE grown, site-controlled pyramidal quantum dots for twin photon generation
Stefano T. Moroni, Simone Varo, Gediminas Juska +3
We characterized stacked double-pyramidal quantum dots which showed biexciton binding energies close to zero by means of photoluminescence and cross-correlation measurements. It wa…
Three-dimensional Self-assembled Columnar Arrays of AlInP Quantum Wires for Polarized Micron-sized Amber Light Emitting Diodes
Andrea Pescaglini, Agnieszka Gocalinska, Silviu Bogusevschi +7
A three-dimensional ordered and self-organized semiconductor system emitting highly-polarized light in the yellow-orange visible range (580-650 nm) is presented, comprising self-as…
Statistical study of stacked/coupled site-controlled pyramidal quantum dots and their excitonic properties
S. T. Moroni, T. H. Chung, G. Juska +2
We report on stacked multiple quantum dots (QDs) formed inside inverted pyramidal recesses, which allow for the precise positioning of the QDs themselves. Specifically we fabricate…
Engineering of selective carrier injection in patterned arrays of single-quantum-dot entangled photon light-emitting diodes
T-H. Chung, G. Juska, S. T. Moroni +3
Scalability and foundry compatibility (as for example in conventional silicon based integrated computer processors) in developing quantum technologies are exceptional challenges fa…
Excitonic lasing of strain-free InP(As) quantum dots in AlInAs microdisk
D. V. Lebedev, M. M. Kulagina, S. I. Troshkov +13
Formation, emission and lasing properties of strain-free InP(As)/AlInAs quantum dots (QDs) embedded in AlInAs microdisk (MD) cavity were investigated using transmission electron mi…
Tuning InP self-assembled quantum structures to telecom wavelength: a versatile original InP(As) nanostructure "workshop"
E. E. Mura, A. Gocalinska, G. Juska +3
The influence of hydride exposure on previously unreported self-assembled InP(As) nanostructures is investigated, showing an unexpected morphological variability with growth parame…
Lithographyically defined, room temperature low threshold subwavelength red-emitting hybrid plasmonic lasers
Ning Liu, Agnieszka Gocalinska, John Justice +9
Hybrid plasmonic lasers provide deep subwavelength optical confinement, strongly enhanced light-matter interaction and together with nanoscale footprint promise new applications in…
Issues related to the usage of nitrogen as carrier gas for the MOVPE growth of GaSb/InAs heterostructures on InAs pseudosubstrates
Hanno Kroencke, Agnieszka Gocalinska, Valeria Dimastrodonato +2
GaSb/InAs/GaSb layer stacks have been grown on InAs metamorphic substrates (pseudosubstrates) by MOVPE, using nitrogen as major carrier gas. We demonstrate that GaSb growth by nitr…
Unexpected aspects of strain relaxation and compensation in InGaAs metamorphic structures grown by MOVPE
A. Gocalinska, M. Manganaro, E. Pelucchi
We present a selection of stack designs for MOVPE grown InxGa1-xAs metamorphic buffer layers following various convex-down compositional continuous gradients of the In content, sho…
Indium segregation during III-V quantum wire and quantum dot formation on patterned substrates
Stefano T. Moroni, Valeria Dimastrodonato, Tung-Hsun Chung +4
We report a model for metalorganic vapor-phase epitaxy on non-planar substrates, specifically V-grooves and pyramidal recesses, which we apply to the growth of InGaAs nanostructure…
Single pairs of time-bin entangled photons
Marijn A. M. Versteegh, Michael E. Reimer, Aafke A. van den Berg +5
Time-bin entangled photons are ideal for long-distance quantum communication via optical fibers. Here we present a source where, even at high creation rates, each excitation pulse…
Evaluation of defect density by top-view large scale AFM on metamorphic structures grown by MOVPE
Agnieszka Gocalinska, Marina Manganaro, Valeria Dimastrodonato +1
We demonstrate an atomic force microscopy based method for estimation of defect density by identification of threading dislocations on a non-flat surface resulting from metamorphic…
Conditions for entangled photon emission from (111)B site-controlled Pyramidal quantum dots
G. Juska, E. Murray, V. Dimastrodonato +4
A study of highly symmetric site-controlled Pyramidal In0.25Ga0.75As quantum dots (QDs) is presented. It is discussed that polarization-entangled photons can be also obtained from…
Unusual nanostructures of "lattice matched" InP on AlInAs
A. Gocalinska, M. Manganaro, G. Juska +6
We show that the morphology of the initial monolayers of InP on Al0.48In0.52As grown by metalorganic vapor-phase epitaxy does not follow the expected layer-by-layer growth mode of…
Towards quantum dot arrays of entangled photon emitters
Gediminas Juska, Valeria Dimastrodonato, Lorenzo O. Mereni +2
We show that with a new family of pyramidal site-controlled InGaAsN quantum dots it is possible to obtain areas containing as much as 15% of polarization-entangled photon emitters…
Surface organization of homoepitaxial InP films grown by metalorganic vapor-phase epitaxy
A. Gocalinska, M. Manganaro, D. D. VVedensky +1
We present a systematic study of the morphology of homoepitaxial InP films grown by metalorganic vapor-phase epitaxy which are imaged with ex situ atomic force microscopy. These fi…