446 citations · 5.1k across the 97 of their papers we have counts for
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Cross-plane thermal conductivity of GaN/AlN superlattices
Anna Spindlberger, Dmytro Kysylychyn, Lukas Thumfart +3
Heterostructures consisting of alternating GaN/AlN epitaxial layers represent the building-blocks of state-of-the-art devices employed for active cooling and energy-saving lightnin…
Predictive design and experimental realization of InAs/GaAs superlattices with tailored thermal conductivity
J. Carrete, B. Vermeersch, L. Thumfart +7
We demonstrate an ab-initio predictive approach to computing the thermal conductivity () of InAs/GaAs superlattices (SLs) of varying period, thickness, and composition. Our new…
Comparison of different bonding techniques for efficient strain transfer using piezoelectric actuators
Dorian Ziss, Javier Martín-Sánchez, Thomas Lettner +5
In this paper strain transfer efficiencies from single crystalline piezoelectric lead magnesium niobate-lead titanate (PMN-PT) substrate to a GaAs semiconductor membrane bonded on…
Reversible Control of In-plane Elastic Stress Tensor in Nanomembranes
Javier Martín-Sánchez, Rinaldo Trotta, Giovanni Piredda +10
Strain engineering allows the physical properties of materials and devices to be widely tailored, as paradigmatically demonstrated by strained transistors and semiconductor lasers…
Energy-tunable sources of entangled photons: a viable concept for solid-state-based quantum relays
Rinaldo Trotta, Javier Martín-Sánchez, Istvan Daruka +2
We propose a new method of generating triggered entangled photon pairs with wavelength on demand. The method uses a micro-structured semiconductor-piezoelectric device capable of d…
Compositionally-modulated Si1-xGex multilayers with cross-plane thermal conductivity below the thin-film alloy limit
Peixuan Chen, N. A. Katcho, J. P. Feser +6
We describe epitaxial Ge/Si multilayers with cross-plane thermal conductivities which can be systematically reduced to exceptionally low values, as compared both with bulk and thin…
Universal recovery of the bright-exciton level-degeneracy in quantum dots without structural symmetry
R. Trotta, E. Zallo, C. Ortix +5
The lack of structural symmetry which usually characterizes semiconductor quantum dots lifts the energetic degeneracy of the bright excitonic states and hampers severely their use…
Strain selectivity of SiGe wet chemical etchants
M. Stoffel, A. Malachias, T. Merdzhanova +6
We investigate the effect of strain on the etching rate of two SiGe wet etchants, namely NH4OH:H2O2 and H2O2. For both etchants, we found that there is no appreciable strain select…
Experimental Observation of Electronic Coupling in GaAs Lateral Quantum Dot Molecules
L. Wang, A. Rastelli, S. Kirawittaya +2
We report the fabrication and photoluminescence properties of laterally-coupled GaAs/AlGaAs quantum dots. The coupling in the quantum dot molecules is tuned by an external electric…
SiOx/Si radial superlattices and microtube optical ring resonators
R. Songmuang, A. Rastelli, S. Mendach +1
Scanning and transmission electron microscopy reveal that SiOx/Si layers can roll-up into microtubes and radial superlattices on a Si substrate. These hybrid objects are thermally…
{\it In-situ} Laser Microprocessing at the Quantum Level
Armando Rastelli, Ata Ulhaq, Suwit Kiravittaya +3
One of the biggest challenges of nanotechnology is the fabrication of nano-objects with perfectly controlled properties. Here we employ a focused laser beam both to characterize an…